Broadcast signal transmission device using layered division multiplexing and channel bonding, and method using same

Abstract

A broadcast signal transmission device according to an embodiment of the present invention comprises: a first RF BICM unit for generating at least one first RF core layer BICM signal and at least one first RF enhanced layer BICM signal; a second RF BICM unit for generating at least one second RF core layer BICM signal; a layered division modulation unit for generating at least one layered division multiplexed signal by performing layered division multiplexing corresponding to at least a part of the at least one first RF core layer BICM signal and at least a part of the at least one first RF enhanced layer BICM signal; and a transmission signal generation unit for generating, among a first RF channel and a second RF channel which are to be channel-bonded, at least one first RF transmission signal corresponding to the first RF channel and at least one second RF transmission signal corresponding to the second RF channel.

Description

Broadcast signal transmission device using hierarchical division multiplexing and channel bonding and method using the same

[0001] The present invention relates to a channel bonding technology of a broadcasting system, and more particularly, to a broadcasting signal transmission / reception system that simultaneously supports channel bonding technology and layered division multiplexing (LDM) and / or MIMO (Multiple-Input Multiple-Output) technology.

[0002] To address the growing demand for ultra-high-definition broadcasting services, efficient use of frequency resources, and the integration of services requiring diverse regions and reception environments, technologies and standards for next-generation terrestrial broadcasting systems have recently been introduced. However, the growing demand for higher resolutions, hyper-realistic media such as AR (Artificial Reality) and VR (Virtual Reality), and additional data for enhanced user experiences, coupled with the lack of idle frequency resources due to the simultaneous provision of existing broadcasting services, necessitates further improvements in the transmission rates of terrestrial broadcasting systems.

[0003] The latest terrestrial digital broadcasting standards, such as ATSC 3.0, attempt to overcome the transmission capacity limitations of a single broadcast frequency by applying multiple antenna technologies such as MIMO (Multiple-Input Multiple-Output) or the limitations of a single channel by applying channel bonding technology. Multiple antenna technology secures spatial physical resources by using two or more antennas for transmission, reception, or both, while channel bonding combines two or more unit channels and treats them as a single channel. Therefore, both technologies can be seen as methods to overcome the limitations of the transmission capacity of generally provided terrestrial broadcasting, and can be applied to service ultra-high definition images exceeding 4K resolution or multiple 4K resolution images.

[0004] Korean Patent Publication Nos. 10-2023-0130517 and 10-2023-0130532 propose a structure for combining MIMO technology and channel bonding technology for transmitting / receiving broadcast signals.

[0005] An object of the present invention is to provide a novel transmitter / receiver structure that operates efficiently even when channel bonding technology and hierarchical division multiplexing are combined.

[0006] Furthermore, it is an object of the present invention to propose a novel transmitter / receiver structure that operates efficiently even when channel bonding, hierarchical division multiplexing, and MIMO technologies are all applied together.

[0007] Additionally, it is an object of the present invention to optimize broadcast signal scheduling parameters when channel bonding, layered division multiplexing and MIMO technologies are all applied together.

[0008] In addition, it is an object of the present invention to optimize the subframe parameters of each channel to be channel-bonded and the signaling parameters of the channel-bonded physical layer pipes when channel bonding, layered division multiplexing and MIMO technologies in SNR averaging mode are applied together.

[0009] In order to achieve the above object, a broadcast signal transmission device according to the present invention includes: a first RF BICM unit that generates at least one first RF core layer BICM signal and at least one first RF enhanced layer BICM signal; a second RF BICM unit that generates at least one second RF core layer BICM signal; a layered division modulation unit that performs layered division multiplexing corresponding to at least a portion of the at least one first RF core layer BICM signal and at least a portion of the at least one first RF enhanced layer BICM signal to generate at least one layered division multiplexed signal; and a transmission signal generation unit that generates at least one first RF transmission signal corresponding to the first RF channel and at least one second RF transmission signal corresponding to the second RF channel among channel-bonded first RF channels and second RF channels. At this time, at least one of the at least one first RF transmission signal and the at least one second RF transmission signal may include a preamble that signals a channel bonding mode of at least one channel-bonded physical layer pipe.

[0010] At this time, for at least one channel bonded physical layer pipe, all data packets engaged may pass through a common input formatting unit.

[0011] At this time, when SNR averaging channel bonding is performed, after the at least one first RF core layer BICM signal, the at least one first RF enhanced layer BICM signal, and the at least one second RF core layer BICM signal are generated, but before the at least one layered division multiplexed signal is generated, a cell exchange corresponding to the SNR averaging channel bonding may be performed.

[0012] At this time, when the above SNR averaging channel bonding is performed, bonded streams originating in the same input formatting unit can be contained in the same LDM (Layered Division Multiplexing) layer.

[0013] At this time, the at least one first RF enhanced layer BICM signal is an enhanced layer MIMO signal corresponding to MIMO (Multiple-Input Multiple-Output), and when MIMO precoding corresponding to the MIMO is performed, the MIMO precoding may be performed before the cell exchange.

[0014] At this time, the at least one first RF core layer BICM signal is a core layer SISO signal corresponding to SISO (Single-Input Single-Output), and the at least one hierarchical division multiplexed signal may include a first polarization signal and a second polarization signal. At this time, the first polarization signal is generated by superposing a power-controlled signal generated by controlling the power of one of the enhanced layer MIMO signals onto the core layer SISO signal, and the second polarization signal may be another one of the enhanced layer MIMO signals.

[0015] At this time, when a channel-bonded physical layer pipe with the SNR averaging channel bonding is included, layered MIMO configurations for the first RF channel and the second RF channel can be identical between the corresponding subframes.

[0016] At this time, when the SNR averaging channel bonding is performed, the type and injection level of layered MIMO may be the same between the corresponding subframes.

[0017] At this time, when the above SNR averaging channel bonding is performed, the MIMO parameters and layer indices may be the same between the physical layer pipes that are channel bonded to each other.

[0018] In addition, a broadcast signal transmission method according to an embodiment of the present invention includes the steps of: generating at least one first RF core layer BICM signal, at least one first RF enhanced layer BICM signal, and at least one second RF core layer BICM signal; performing layer division multiplexing corresponding to at least a portion of the at least one first RF core layer BICM signal and at least a portion of the at least one first RF enhanced layer BICM signal to generate at least one layer division multiplexed signal; and generating at least one first RF transmission signal corresponding to the first RF channel and at least one second RF transmission signal corresponding to the second RF channel among the first RF channel and the second RF channel that are channel-bonded. At this time, at least one of the at least one first RF transmission signal and the at least one second RF transmission signal may include a preamble signaling a channel bonding mode of at least one channel-bonded physical layer pipe.

[0019] At this time, for at least one channel bonded physical layer pipe, all data packets engaged may pass through a common input formatting unit.

[0020] At this time, when SNR averaging channel bonding is performed, after the at least one first RF core layer BICM signal, the at least one first RF enhanced layer BICM signal, and the at least one second RF core layer BICM signal are generated, but before the at least one layered division multiplexed signal is generated, a cell exchange corresponding to the SNR averaging channel bonding may be performed.

[0021] At this time, when the above SNR averaging channel bonding is performed, bonded streams originating in the same input formatting unit can be contained in the same LDM (Layered Division Multiplexing) layer.

[0022] At this time, the at least one first RF enhanced layer BICM signal is an enhanced layer MIMO signal corresponding to MIMO (Multiple-Input Multiple-Output), and when MIMO precoding corresponding to the MIMO is performed, the MIMO precoding may be performed before the cell exchange.

[0023] At this time, the at least one first RF core layer BICM signal is a core layer SISO signal corresponding to SISO (Single-Input Single-Output), and the at least one hierarchical division multiplexed signal may include a first polarization signal and a second polarization signal. At this time, the first polarization signal is generated by superposing a power-controlled signal generated by controlling the power of one of the enhanced layer MIMO signals onto the core layer SISO signal, and the second polarization signal may be another one of the enhanced layer MIMO signals.

[0024] At this time, when a channel-bonded physical layer pipe with the SNR averaging channel bonding is included, layered MIMO configurations for the first RF channel and the second RF channel can be identical between the corresponding subframes.

[0025] At this time, when the SNR averaging channel bonding is performed, the type and injection level of layered MIMO may be the same between the corresponding subframes.

[0026] At this time, when the above SNR averaging channel bonding is performed, the MIMO parameters and layer indices may be the same between the physical layer pipes that are channel bonded to each other.

[0027] In addition, in one embodiment of the present invention, a broadcast signal receiving method includes the steps of: receiving at least one first RF transmission signal corresponding to a first RF channel and at least one second RF transmission signal corresponding to the second RF channel among a first RF channel and a second RF channel that are channel-bonded; restoring a preamble using at least one or more of the at least one first RF transmission signal and the at least one second RF transmission signal; and performing a reverse process of channel bonding corresponding to a channel bonding format field included in the preamble. At this time, the channel bonding format field can signal a channel bonding mode of at least one channel-bonded physical layer pipe.

[0028] At this time, the at least one first RF transmission signal may correspond to at least one hierarchical division multiplexed signal generated by performing hierarchical division multiplexing corresponding to at least a portion of at least one first RF core layer BICM signal and at least a portion of at least one first RF enhanced layer BICM signal.

[0029] At this time, when the channel bonding format field corresponds to SNR averaging channel bonding, after the at least one first RF core layer BICM signal, the at least one first RF enhanced layer BICM signal, and the at least one second RF core layer BICM signal are generated, and before the at least one layered division multiplexed signal is generated, a cell exchange corresponding to the SNR averaging channel bonding may be performed to generate the at least one first RF transmission signal.

[0030] At this time, the at least one first RF enhanced layer BICM signal is an enhanced layer MIMO signal corresponding to MIMO (Multiple-Input Multiple-Output), and when MIMO precoding corresponding to the MIMO is performed, the MIMO precoding may be performed before the cell exchange.

[0031] According to the present invention, a new transmitter / receiver structure that operates efficiently even when channel bonding technology and hierarchical division multiplexing are combined can be provided.

[0032] Additionally, the present invention can provide a novel transmitter / receiver structure that operates efficiently even when channel bonding, hierarchical division multiplexing, and MIMO technologies are all applied together.

[0033] Additionally, the present invention can optimize broadcast signal scheduling parameters when channel bonding, layered division multiplexing, and MIMO technologies are all applied together.

[0034] In addition, the present invention can optimize the subframe parameters of each channel to be channel-bonded and the signaling parameters of the channel-bonded physical layer pipes when channel bonding, layered division multiplexing, and MIMO technologies in SNR averaging mode are applied together.

[0035] Figure 1 is a block diagram showing an example of a broadcast signal transmission device using multiple transmission antennas and channel bonding.

[0036] Fig. 2 is a block diagram showing an example of the MIMO precoding unit illustrated in Fig. 1.

[0037] FIG. 3 is a block diagram showing an example of the first cell exchanger illustrated in FIG. 1.

[0038] FIG. 4 is a block diagram showing an example of the second cell exchanger illustrated in FIG. 1.

[0039] Fig. 5 is a block diagram showing another example of a broadcast signal transmission device using multiple transmission antennas and channel bonding.

[0040] FIG. 6 is a flowchart illustrating a broadcast signal generation method for generating a broadcast signal when the channel bonding mode according to one embodiment of the present invention is an SNR averaging mode.

[0041] Figure 7 is a flowchart illustrating a broadcast signal receiving method according to one embodiment of the present invention.

[0042] FIG. 8 is a diagram showing another example of a broadcast signal transmission device using multiple transmission antennas and channel bonding.

[0043] FIG. 9 is a block diagram showing an example of a broadcast signal transmission device illustrated in FIG. 8 when plain channel bonding is applied.

[0044] FIG. 10 is a block diagram showing an example of a broadcast signal transmission device illustrated in FIG. 8 when SNR averaging channel bonding is applied.

[0045] FIG. 11 is a block diagram showing another example of a broadcast signal transmission device illustrated in FIG. 8 when SNR averaging channel bonding is applied.

[0046] Fig. 12 is a block diagram showing another example of a broadcast signal transmission device using multiple transmission antennas and channel bonding.

[0047] Fig. 13 is a block diagram showing an example of a broadcast signal transmission device according to one embodiment of the present invention.

[0048] Fig. 14 is a block diagram showing an example of the LDM coupling unit illustrated in Fig. 13.

[0049] Figure 15 is a diagram showing an example of a SISO distributed pilot pattern corresponding to SP3_2.

[0050] Fig. 16 is a diagram showing an example of a Walsh-Hadamard encoded MIMO distributed pilot pattern corresponding to MP3_2.

[0051] FIG. 17 is a diagram showing an example of a null pilot encoded MIMO distributed pilot pattern corresponding to MP3_2.

[0052] FIG. 18 is a diagram showing an example of a transmission signal configuration when a SISO signal is transmitted through only one of two MIMO antennas.

[0053] FIG. 19 is a diagram showing an example of a transmission signal configuration when a SISO signal is transmitted through both MIMO antennas.

[0054] Figure 20 is a diagram comparing a SISO distributed pilot pattern and a MIMO distributed pilot pattern.

[0055] Fig. 21 is a block diagram showing an example of a broadcast signal transmission device using multiple transmission antennas and hierarchical division multiplexing.

[0056] FIG. 22 is a diagram showing a physical layer frame of a broadcast signal according to an embodiment of the present invention.

[0057] FIG. 23 is a diagram illustrating broadcast signal frames transmitted through two MIMO antennas according to one embodiment of the present invention.

[0058] Figure 24 is a block diagram showing an example of a broadcast signal transmission device in which channel bonding and hierarchical division multiplexing are used together.

[0059] Figure 25 is a block diagram showing an example of a broadcast signal transmission device in which MIMO, channel bonding, and hierarchical division multiplexing are used together.

[0060] Figures 26 to 28 are block diagrams showing other examples of broadcast signal transmission devices in which MIMO, channel bonding, and hierarchical division multiplexing are used together.

[0061] Figure 29 is a flowchart illustrating a broadcast signal transmission method according to one embodiment of the present invention.

[0062] Figure 30 is a flowchart illustrating a broadcast signal receiving method according to one embodiment of the present invention.

[0063] Figure 31 is a block diagram showing a computer system configuration according to one embodiment of the present invention.

[0064] The present invention will be described in detail with reference to the attached drawings. Herein, repetitive descriptions, well-known functions that may unnecessarily obscure the gist of the present invention, and detailed descriptions of configurations are omitted. The embodiments of the present invention are provided to more fully explain the present invention to those of ordinary skill in the art. Accordingly, the shapes and sizes of elements in the drawings may be exaggerated for clarity.

[0065] Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the attached drawings.

[0066] Figure 1 is a block diagram showing an example of a broadcast signal transmission device using multiple transmission antennas and channel bonding.

[0067] Referring to FIG. 1, a broadcast signal transmission device using multiple transmission antennas and channel bonding according to an embodiment of the present invention includes an input formatting unit (110), a stream distributor (120), a first BICM unit (131), a second BICM unit (132), a first MIMO precoding unit (141), a second MIMO precoding unit (142), a first cell exchanger (151), a second cell exchanger (152), framing & interleaving units (161, 162, 163, 164), waveform generators (171, 172, 173, 174), and antenna units (181, 182).

[0068] The structure and operation of each component illustrated in Fig. 1 are disclosed in detail in Korean Patent Publication Nos. 10-2023-0130517 and 10-2023-0130532, etc.

[0069] The input formatting unit (110) generates packetized data (baseband packets) in units of processing blocks of the transmission system. At this time, the transmission system can classify packets to which the same BICM (Bit Interleaved Coded Modulation) and transmission signal generation parameters are applied and define them as the same PLP (Physical Layer Pipe).

[0070] The stream distributor (120) separates the input bit stream into two different channels (RF 1, RF 2).

[0071] That is, baseband packets, which are packetized data in units of processing blocks of a transmission system using channel bonding, are generated through the input formatting unit (110) and the stream distributor (120). At this time, the stream distributor (120) can separate the bit string entering the input formatting unit (110) so that it is transmitted to two different channels. Through this, two different baseband packet strings are input to the first BICM unit (131) and the second BICM unit (132), which are BICM blocks located in the signal generation path of RF 1 and the signal generation path of RF 2, respectively.

[0072] The two data columns packetized into block units are processed in the first BICM unit (131) and the second BICM unit (132), respectively.

[0073] The first BICM unit (131) and the second BICM unit (132) may each include an FEC (Forward Error Correction) unit, a BIL (Bit Interleaver) unit, and a MIMO (Multiple-Input Multiple-Output) MAP (mapping) unit. At this time, the FEC unit may apply channel coding to baseband packets to generate FEC frames, which are groups of bits. At this time, the channel coding may be a single-structure method, or may be a method composed of multiple stages, such as inner and outer coding. At this time, the BIL unit may perform bit interleaving on the FEC frames output from the FEC unit. At this time, the MIMO MAP unit may generate data cells for transmitting output to each of the multiple antennas with respect to the output bit string of the BIL unit. To this end, the MIMO MAP unit can be composed of two sub-blocks: a demultiplexer unit and a bit-to-IQ mapping unit. At this time, the demultiplexer unit can group input bit streams according to the modulation order and the number of multiple antennas in order to convert them into data cells. At this time, the bit stream corresponding to each group can be different depending on the modulation order and the number of multiple antennas. The bit-to-IQ mapping unit maps the output of the demultiplexer unit to constellations corresponding to groups of bits corresponding to each antenna output, and generates data cells corresponding to each antenna output. In one embodiment, even-numbered bit groups (or vectors) can be mapped to data cells for the first antenna (ANTENNA 1), and odd-numbered bit groups (or vectors) can be mapped to data cells for the second antenna (ANTENNA 2). At this time, grouping of each bit in the MIMO MAP section or constellation mapping of bits using this can be performed using various methods not illustrated.

[0074] The first antenna (ANTENNA 1) and the second antenna (ANTENNA 2) may correspond to a first polarization and a second polarization, respectively. That is, the first antenna (ANTENNA 1) may correspond to a first polarization, and the second antenna (ANTENNA 2) may correspond to a second polarization. For example, the first polarization may be vertical polarization, and the second polarization may be horizontal polarization.

[0075] Here, polarization can be the orientation of the electric field vector of a radiated electromagnetic wave with respect to the horizon as seen from the antenna. In other words, polarization can describe the orientation of the wave emitted from. This orientation can be planar or circular.

[0076] Hereinafter, the first antenna may be replaced with the first polarization and the second antenna may be replaced with the second polarization.

[0077] Groups of two different data cells are input to the MIMO precoding units (141, 142).

[0078] At this time, the MIMO precoding units (141, 142) may include a streaming combiner, an IQ polarization interleaving unit, and a phase hopping unit, respectively. At this time, the stream combiner may combine two data cells inputted and output them. At this time, the IQ polarization interleaving unit may exchange the quadrature components of the two data cells inputted and output them. At this time, the phase hopping unit may change the phase of the data cells inputted and output them. At this time, all three sub-blocks may be activated and operated, all may be deactivated and operated, or only some of the blocks may be activated and operated. In addition, each sub-block may output a different signal or the same signal depending on the channel coding rate and modulation order applied to the data cells inputted to each sub-block. The MIMO precoding units (141, 142) illustrated in FIG. 1 can output two data cells to be output through the first antenna (ANTENNA 1) and the second antenna (ANTENNA 2).

[0079] The first cell exchanger (151) and the second cell exchanger (152) illustrated in FIG. 1 can be activated / deactivated, respectively, depending on the channel bonding mode. When the first cell exchanger (151) is deactivated, the input and output of the first cell exchanger (151) can be the same without exchange. When the second cell exchanger (152) is deactivated, the input and output of the second cell exchanger (152) can be the same without exchange.

[0080] For example, when the first cell exchanger (151) is deactivated, the data cell corresponding to the first antenna (ANTENNA 1) in the output of the MIMO precoding unit (141) input to the first cell exchanger (151) is output to the framing & interleaving unit (161) that generates a signal output through the first antenna (ANTENNA 1) corresponding to RF 1, and the data cell corresponding to the first antenna (ANTENNA 1) in the output of the MIMO precoding unit (142) is output to the framing & interleaving unit (163) that generates a signal output through the first antenna (ANTENNA 1) corresponding to RF 2. And, when the second cell exchanger (152) is deactivated, the data cell corresponding to the second antenna (ANTENNA 2) in the output of the MIMO precoding unit (141) input to the second cell exchanger (152) is output to the framing & interleaving unit (162) which generates a signal output through the second antenna (ANTENNA 2) corresponding to RF 1, and the data cell corresponding to the second antenna (ANTENNA 2) in the output of the MIMO precoding unit (142) is output to the framing & interleaving unit (164) which generates a signal output through the second antenna (ANTENNA 2) corresponding to RF 2.

[0081] When the first cell exchanger (151) is activated, the first cell exchanger (151) can exchange data between channels (RF 1, RF 2), so that baseband packets and FEC blocks to be transmitted can be transmitted through both RF channels (RF 1, RF 2). When the second cell exchanger (152) is activated, the second cell exchanger (152) can exchange data between channels (RF 1, RF 2), so that baseband packets and FEC blocks to be transmitted can be transmitted through both RF channels (RF 1, RF 2). However, even when the first cell exchanger (151) and the second cell exchanger (152) are activated, cell exchange can be performed only for some inputs (e.g., odd-numbered inputs).

[0082] In this way, when channel bonding (SNR averaging channel bonding) using crossover between channels of data cells is applied, the first cell exchanger (151) and / or the second cell exchanger (152) are activated.

[0083] At this time, when a channel bonding technology using multi-antenna technology and channel-to-channel crossing is applied in combination, the activated cell exchanger operates by considering both multi-antenna and channel.

[0084] For example, the first cell exchanger (151) can output the input data as is without crossing if the data cell output order pair corresponding to each of the first antenna (ANTENNA 1) and the second antenna (ANTENNA 2) in the output of the MIMO precoding unit (141) is an even number. At this time, the second cell exchanger (152) can output the input data as is without crossing if the data cell output order pair corresponding to each of the first antenna (ANTENNA 1) and the second antenna (ANTENNA 2) in the output of the MIMO precoding unit (141) is an even number. The first antenna (ANTENNA 1) and second antenna (ANTENNA 2) data cell order pair corresponding to RF 1 from the output of the first cell exchanger (151) and the second cell exchanger (152) can be output through the RF 1 antenna unit (181) via the framing & interleaving units (161, 162) and waveform generators (171, 172) of RF 1, and the first antenna (ANTENNA 1) and second antenna (ANTENNA 2) data cell order pair corresponding to RF 2 can be output through the RF 2 antenna unit (182) via the framing & interleaving units (163, 164) and waveform generators (173, 174) of RF 2.

[0085] On the other hand, if the data cell output order pair corresponding to each of the first antenna (ANTENNA 1) and the second antenna (ANTENNA 2) of the MIMO precoding unit (141) corresponding to the RF 1 transmission signal generation path and the data cell output order pair corresponding to each of the first antenna (ANTENNA 1) and the second antenna (ANTENNA 2) of the MIMO precoding unit (142) corresponding to the RF 2 transmission signal generation path are odd-numbered, the data cell output order pair corresponding to RF 1 is output through the RF 2 antenna unit (182) via the framing & interleaving units (163, 164) and waveform generators (173, 174) corresponding to the transmission signal generation path corresponding to RF 2 before the first cell exchanger (151) and the second cell exchanger (152), and the data cell output corresponding to RF 2 is output The ordered pair can be output through the RF 1 antenna unit (181) via the framing & interleaving units (161, 162) and waveform generators (171, 172) corresponding to the transmission signal generation path corresponding to RF 1.

[0086] That is, when it is an even-numbered data cell order pair, the data cell corresponding to the first antenna (ANTENNA 1) in the output of the MIMO precoding unit (141) input to the first cell exchanger (151) is output to the framing & interleaving unit (161) which generates a signal output through the first antenna (ANTENNA 1) corresponding to RF 1, and the data cell corresponding to the first antenna in the output of the MIMO precoding unit (142) is output to the framing & interleaving unit (163) which generates a signal output through the first antenna (ANTENNA 1) corresponding to RF 2. At this time, the data cell corresponding to the second antenna (ANTENNA 2) in the output of the MIMO precoding unit (141) input to the second cell exchanger (152) may be output to the framing & interleaving unit (162) that generates a signal output through the second antenna (ANTENNA 2) corresponding to RF 1, and the data cell corresponding to the second antenna in the output of the MIMO precoding unit (142) may be output to the framing & interleaving unit (164) that generates a signal output through the second antenna (ANTENNA 2) corresponding to RF 2.

[0087] In addition, when it is an odd-numbered data cell order pair, the data cell corresponding to the first antenna (ANTENNA 1) in the output of the MIMO precoding unit (141) input to the first cell exchanger (151) is output to the framing & interleaving unit (163) that generates a signal output through the first antenna (ANTENNA 1) corresponding to RF 2, and the data cell corresponding to the first antenna in the output of the MIMO precoding unit (142) is output to the framing & interleaving unit (161) that generates a signal output through the first antenna (ANTENNA 1) corresponding to RF 1. At this time, the data cell corresponding to the second antenna (ANTENNA 2) in the output of the MIMO precoding unit (141) input to the second cell exchanger (152) may be output to the framing & interleaving unit (164) that generates a signal output through the second antenna (ANTENNA 2) corresponding to RF 2, and the data cell corresponding to the second antenna in the output of the MIMO precoding unit (142) may be output to the framing & interleaving unit (162) that generates a signal output through the second antenna (ANTENNA 2) corresponding to RF 1.

[0088] At this time, the input of the first cell exchanger (151) is a precoded first polarization input pair (s 2i,1 , s 2i,2 )(i is an integer greater than or equal to 0), and the input of the second cell exchanger (152) may be a precoded second polarization input pair (s 2i+1,1 , s 2i+1,2 ) may be. At this time, the first cell exchanger (151) may be a MIMO precoded first polarization input pair (s 2i,1 , s 2i,2 )(i is an integer greater than or equal to 0) to perform a cell exchange to obtain the first exchange output pair (g 2i,1 , g 2i,2 ) and the second cell exchanger (152) generates a MIMO precoded second polarization input pair (s 2i+1,1 , s 2i+1,2) to perform a cell exchange on the second exchange output pair (g 2i+1,1 , g 2i+1,2 ) can be created.

[0089] At this time, the first cell exchanger (151) can output the precoded first polarization input pair as the first exchange output pair if the precoded first polarization input pair is an even number (i is 0 or an even number), and the second cell exchanger (152) can output the precoded second polarization input pair as the second exchange output pair if the precoded second polarization input pair is an even number (i is 0 or an even number). At this time, the first cell exchanger (151) can output the first exchange output pair by crossing the first precoded polarization input pair when the first precoded polarization input pair is odd (i is odd), and the second cell exchanger (152) can output the second exchange output pair by crossing the second precoded polarization input pair when the second precoded polarization input pair is odd (i is odd).

[0090] At this time, the first cell exchanger (151) and the second cell exchanger (152) each correspond to a cell exchange matrix, and the cell exchange matrix corresponding to the first cell exchanger (151) and the cell exchange matrix corresponding to the second cell exchanger (152) may be the same.

[0091] At this time, the first cell exchanger (151) and the second cell exchanger (152) operate based on at least one of a channel bonding format field included in the L1 signaling information for the first RF and a channel bonding format field included in the L1 signaling information for the second RF, respectively, and the channel bonding format field may indicate one of a plain channel bonding mode and an SNR averaging channel bonding mode with 2 bits. At this time, the first cell exchanger (151) and the second cell exchanger (152) may confirm that the channel bonding format field corresponding to the first RF and the channel bonding format field corresponding to the second RF are the same, and may operate based on the 2-bit channel bonding format field that is set to be the same.

[0092] At this time, the channel bonding format field included in the L1 signaling information for the first RF and the channel bonding format field included in the L1 signaling information for the second RF may be set to be the same. Depending on the embodiment, the channel bonding format field included in the L1 signaling information for the first RF and the channel bonding format field included in the L1 signaling information for the second RF may be set to be different from each other.

[0093] At this time, the first cell exchanger (151) and the second cell exchanger (152) may be activated when the SNR averaging channel bonding mode is applied. At this time, when the SNR averaging channel bonding mode is applied, the MIMO precoding unit (141) and the MIMO precoding unit (142) may correspond to the same MIMO setting. That is, when the SNR averaging channel bonding mode is applied, the MIMO setting of the MIMO precoding unit (141) and the MIMO setting of the MIMO precoding unit (142) may be the same.

[0094] When the SNR averaging channel bonding mode is applied, the MIMO precoded first polarization input pair (s2i,1 , s 2i,2 )'s first input (s) 2i,1 ) and MIMO precoded second polarization input pair (s 2i+1,1 , s 2i+1,2 )'s first input (s) 2i+1,1 ) and a MIMO setup that generates a MIMO precoded first polarization input pair (s 2i,1 , s 2i,2 ) second input (s) 2i,2 ) and MIMO precoded second polarization input pair (s 2i+1,1 , s 2i+1,2 ) second input (s) 2i+1,2 ) can be the same MIMO settings.

[0095] At this time, channel bonding can set whether to enable cell exchange block operation for each physical layer pipe. At this time, the cell exchange block can also select whether to enable operation for each polarization. That is, cell exchange can be applied to both polarizations, to only some polarizations, or to none of the polarizations.

[0096] At this time, the MIMO setting may correspond to the first field (L1D_plp_mimo_stream_combining), the second field (L1D_plp_mimo_IQ_interleaving), and the third field (L1D_plp_mimo_PH) corresponding to MIMO precoding. At this time, the first field, the second field, and the third field may all be 1-bit fields. At this time, the first field may be a field corresponding to activation / deactivation of the stream combining unit of FIG. 2, which will be described later, the second field may be a field corresponding to activation / deactivation of the IQ polarization interleaving unit, and the third field may be a field corresponding to activation / deactivation of the phase hopping unit.

[0097] MIMO transmission and reception can be performed even when all of the first, second, and third fields are set to disabled (when MIMO precoding is not performed).

[0098] The first RF section (191) is the first output (g) of the first exchange output pair. 2i,1 ) and the first output (g) of the second exchange output pair 2i+1,1 ) is used to generate first RF MIMO signals corresponding to the first RF (Radio Frequency). At this time, the first RF unit (191) may include framing & interleaving units (161, 162), waveform generators (171, 172), and an antenna unit (181).

[0099] The second RF section (192) is the second output (g) of the first cell exchanger. 2i,2 ) and the second output (g) of the second cell exchanger 2i+1,2 ) to generate second RF MIMO signals corresponding to the second RF. At this time, the second RF unit (192) may include framing & interleaving units (163, 164), waveform generators (173, 174), and an antenna unit (182).

[0100] The first RF unit (191) and the second RF unit (192) can form a signal generation unit.

[0101] The framing & interleaving units (161, 162, 163, 164) illustrated in FIG. 1 can each generate a signal corresponding to a frame to be transmitted via an antenna using data cells input as input. At this time, the framing & interleaving units (161, 162, 163, 164) may or may not activate and perform time interleaving for each input data cell. At this time, the framing & interleaving units (161, 162, 163, 164) may each perform framing for configuring a preamble symbol and a subframe for each data cell. At this time, the preamble symbol may not include a data cell. At this time, frequency interleaving may or may not be activated and applied.

[0102] At this time, the time interleavers corresponding to the first exchange output pair and the second exchange output pair can correspond to a total memory requirement that is twice the total memory requirement for MIMO applied to a single RF channel and four times the total memory requirement of SISO (Single-Input Single-Output) applied to a single RF channel.

[0103] The grouped data cells, which are the outputs of the framing & interleaving units (161, 162, 163, 164), are input to the waveform generators (171, 172, 173, 174). At this time, the waveform generators (171, 172, 173, 174) may each perform an IFFT (Inverse Fast Fourier Transform) after pilot insertion and insert a guard interval symbol. In addition, the waveform generators (171, 172, 173, 174) may each generate a bootstrap symbol and output it by positioning it at the very beginning of the transmission frame. At this time, each of the waveform generators (171, 172, 173, 174) may activate and apply the MISO (Multiple-Input Single-Output) signal processing function or may deactivate and not apply it.

[0104] Using the broadcast signal transmitter exemplified in Figure 1, one can enjoy the increased transmission rate within a single frequency achieved by multiple antennas, and utilize multiple single frequencies as if they were a single frequency. Furthermore, in addition to the multiplexing effect achieved through multiple antennas, additional channel multiplexing effects can be achieved by crossing multiple broadcast channels. Therefore, the present invention overcomes the limitations of existing broadcast transmission methods, enabling the provision of hyper-realistic media services and the full utilization of scarce frequency resources.

[0105] Fig. 2 is a block diagram showing an example of the MIMO precoding unit illustrated in Fig. 1.

[0106] Referring to FIG. 2, the MIMO precoding unit (141 or 142) illustrated in FIG. 1 includes a stream combining unit (210), an IQ polarization interleaving unit (220), and a phase hopping unit (230).

[0107] The stream combining unit (210) can combine two data cells coming in as input and output them.

[0108] The IQ polarization interleaving unit (220) can output the quadrature components of two data cells input by exchanging them with each other.

[0109] The phase hopping unit (230) can change the phase of data cells coming in as input and output them.

[0110] At this time, the stream combining unit (210), the IQ polarization interleaving unit (220), and the phase hopping unit (230) may all be activated, all may be deactivated, or only some of them may be activated and operate. In addition, depending on the channel coding rate and modulation order applied to the data cells input to each of the stream combining unit (210), the IQ polarization interleaving unit (220), and the phase hopping unit (230), the stream combining unit (210), the IQ polarization interleaving unit (220), and the phase hopping unit (230) may output different signals or the same signals, respectively.

[0111] The first cell exchanger (151) and the second cell exchanger (152) illustrated in FIG. 1 may exist independently and operate independently for the first antenna / first polarization and the second antenna / second polarization, respectively, or may operate identically for simplicity of implementation.

[0112] FIG. 3 is a block diagram showing an example of the first cell exchanger illustrated in FIG. 1.

[0113] Referring to FIG. 3, the first cell exchanger illustrated in FIG. 1 includes a MIMO precoded first polarization input pair (s 2i,1 , s 2i,2 )(i is an integer greater than or equal to 0) to perform a cell exchange to obtain the first exchange output pair (g 2i,1 , g 2i,2 ) is created.

[0114] The first polarization input pair (s) 2i,1 , s 2i,2) may be cells corresponding to RF channel 1 and RF channel 2 transmitted to the first polarization / first antenna.

[0115] First exchange output pair (g 2i,1 , g 2i,2 ) may be cells corresponding to RF channel 1 and RF channel 2 transmitted to the first polarization / first antenna.

[0116] At this time, the first exchange output pair (g 2i,1 , g 2i,2 ) may be output cells output to time interleavers of RF 1 and RF 2 via the first antenna / first polarization, and may be provided to time interleavers corresponding to the framing & interleaving units illustrated in FIG. 1.

[0117] When SNR averaging channel bonding is applied, the first cell exchanger may be applied for the first antenna / first polarization.

[0118] At this time, as in the following mathematical expression 1, the cell exchange matrix defined for the first antenna / first polarization is index i (i = 0 ... ┕N cells / 2┙ -1) must be multiplied by the vector including both cells for each input path at index i.

[0119] [Mathematical Formula 1]

[0120]

[0121] In the above mathematical expression 1, the input cells s input to the cell exchanger 2i,1 and s 2i,2 are associated with RF channels RF 1 and RF 2 respectively. Output cells g output from the cell exchanger 2i,1 and g 2i,2 are associated with RF 1 and RF 2 respectively.

[0122] In FIG. 3, TI represents a time interleaver, Tx1 represents a first antenna or a first polarization, and Tx2 represents a second antenna or a second polarization.

[0123] FIG. 4 is a block diagram showing an example of the second cell exchanger illustrated in FIG. 1.

[0124] Referring to FIG. 4, the second cell exchanger illustrated in FIG. 1 includes a MIMO precoded second polarization input pair (s 2i+1,1 , s 2i+1,2 )(i is an integer greater than or equal to 0) to perform a cell exchange to obtain the second exchange output pair (g 2i+1,1 , g 2i+1,2 ) is created.

[0125] Second polarization input pair (s 2i+1,1 , s 2i+1,2 ) may be cells corresponding to RF channel 1 and RF channel 2 transmitted to the second polarization / second antenna.

[0126] Second exchange output pair (g 2i+1,1 , g 2i+1,2 ) may be cells corresponding to RF channel 1 and RF channel 2 transmitted to the second polarization / second antenna.

[0127] At this time, the second exchange output pair (g 2i+1,1 , g 2i+1,2 ) may be output cells output to time interleavers of RF 1 and RF 2 via the second antenna / second polarization, and may be provided to time interleavers corresponding to the framing & interleaving units illustrated in FIG. 1.

[0128] When SNR averaging channel bonding is applied, a second cell exchanger may be applied for the second antenna / second polarization.

[0129] At this time, as in the following mathematical expression 2, the cell exchange matrix defined for the second antenna / second polarization is index i (i = 0 ... ┕N cells / 2┙ -1) must be multiplied by the vector including both cells for each input path at index i.

[0130] [Equation 2]

[0131]

[0132] In the above mathematical expression 2, the input cells s input to the cell exchanger 2i+1,1 and s 2i+1,2 are associated with RF channels RF 1 and RF 2 respectively. Output cells g output from the cell exchanger 2i+1,1 and g 2i+1,2 are associated with RF 1 and RF 2 respectively.

[0133] In Fig. 4, TI represents a time interleaver, Tx1 represents a first antenna or a first polarization, and Tx2 represents a second antenna or a second polarization.

[0134] In the examples shown in FIGS. 3 and 4, the first cell exchanger (151) and the second cell exchanger (152) are described as being provided separately and their operations are determined independently. However, depending on the embodiment, the first cell exchanger (151) and the second cell exchanger (152) may be implemented as one device, or may operate identically to simplify the operation.

[0135] The embodiments illustrated in FIGS. 3 and 4 can also be applied to a broadcast signal transmission device to which layered division multiplexing is applied. According to an embodiment, the cell switching block can receive an LDM combined signal as input, and the output of the cell switching block can be transmitted to the framing & interleaving unit. According to an embodiment, the cell switching block can receive a MIMO signal processed signal as input, and the output of the cell switching block can also be provided to the LDM combining unit.

[0136] The first cell exchanger (151) and the second cell exchanger (152) illustrated in FIG. 1 may both be activated, both may be deactivated, or only one of them may be activated.

[0137] Therefore, when channel bonding technology and MIMO technology are applied together, the receiver must obtain information on whether the first cell exchanger (151) and the second cell exchanger (152) of the transmitter are activated.

[0138] In particular, the preamble of an ATSC 3.0 broadcast signal frame may include L1-detail signaling fields as L1 signaling information, and the L1-detail signaling fields may include a 2-bit L1D_plp_channel_bonding_format field.

[0139] For example, the 2-bit L1D_plp_channel_bonding_format field can be set as shown in Table 1 below.

[0140] ValueMeaning00Plain channel bonding01SNR averaged channel bonding10Reserved for future use11Reserved for future use

[0141] In the example described in Table 1, plane channel bonding may refer to a channel bonding mode in which the cell exchange unit is deactivated and no cell exchange occurs, and SNR averaging channel bonding may refer to a channel bonding mode in which the cell exchange unit is activated and cell exchange occurs.

[0142] Fig. 5 is a block diagram showing another example of a broadcast signal transmission device using multiple transmission antennas and channel bonding.

[0143] Referring to FIG. 5, a broadcast signal transmission device using multiple transmission antennas and channel bonding according to an embodiment of the present invention includes an input formatting unit (110), a stream distributor (120), a first BICM unit (131), a second BICM unit (132), a first MIMO precoding unit (141), a second MIMO precoding unit (142), a first cell exchanger (151), a second cell exchanger (152), framing & interleaving units (161, 162, 163, 164), waveform generators (171, 172, 173, 174), antenna units (181, 182), and an L1 (Layer 1) signaling generator (510).

[0144] Among the components illustrated in FIG. 5, components other than the L1 signaling generator (510) have already been sufficiently explained in the description through FIG. 1, so a repeated explanation will be omitted.

[0145] Since the broadcast signal transmission device illustrated in FIG. 5 includes a first cell exchanger (151) and a second cell exchanger (152), information on whether these two components are activated must be transmitted to the receiver.

[0146] Accordingly, information regarding whether the first cell exchanger (151) is activated and information regarding whether the second cell exchanger (152) is activated are provided to the L1 signaling generator (510).

[0147] The L1 signaling generator (510) receives information regarding whether the first cell exchanger (151) is activated and information regarding whether the second cell exchanger (152) is activated, and generates L1 signaling information for RF 1 and L1 signaling information for RF 2 based on the information. At this time, the L1 signaling information for RF 1 may be provided to the framing & interleaving units (161, 162), and the L1 signaling information for RF 2 may be provided to the framing & interleaving units (163, 164).

[0148] At this time, the L1 signaling information for RF 1 and the L1 signaling information for RF 2 may include a channel bonding format field. At this time, the channel bonding format field may be an L1D_plp_channel_bonding_format field.

[0149] At this time, the L1D_plp_channel_bonding_format field included in the L1 signaling information for RF 1 and the L1D_plp_channel_bonding_format field included in the L1 signaling information for RF 2 may be set to be the same. At this time, the L1D_plp_channel_bonding_format field included in the L1 signaling information for RF 1 and the L1D_plp_channel_bonding_format field included in the L1 signaling information for RF 2 may be set to be different from each other.

[0150] At this time, the framing & interleaving units (161, 162, 163, 164) can generate a preamble based on the L1 signaling information provided from the L1 signaling generator (510). At this time, the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (161, 162) can be set to be identical to the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (163, 164). At this time, the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (161, 162) may be set differently from the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (163, 164).

[0151] At this time, the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (161, 162) can be set in the same manner as Table 1 above, and the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (163, 164) can also be set in the same manner as Table 1 above. At this time, the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (161, 162) can be set to be identical to the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (163, 164).

[0152] If the L1D_plp_channel_bonding_format field is set in the same manner as Table 1, and the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (161, 162) is set to be identical to the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (163, 164), both the first cell exchanger and the second cell exchanger of the broadcast signal transmission device may be deactivated or both may be activated.

[0153] To cover the case where only one of the first cell exchanger and the second cell exchanger is disabled, a 2-bit L1D_plp_channel_bonding_format field as shown in Table 2 below may be used.

[0154] ValueMeaning00Plain channel bonding01SNR averaged channel bonding for both antenna 1 and 210SNR averaged channel bonding for antenna 1 only(Plain channel bonding for antenna 2)11SNR averaged channel bonding for antenna 2 only(Plain channel bonding for antenna 1)

[0155] When the L1D_plp_channel_bonding_format field as described in Table 2 is used, the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (161, 162) may be set identically to the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (163, 164). That is, in this case, for Physical Layer Pipes (PLPs) to which both channel bonding technology and MIMO technology are applied, the L1D_plp_channel_bonding_format field may be set identically for both RF 1 and RF 2.

[0156] At this time, if L1D_plp_channel_bonding_format is set to 01, 10, or 11, the modulation chains for RF 1 and RF 2 can have the same BICM configuration.

[0157] Table 3 below may be for a case where the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (161, 162) is set differently from the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (163, 164).

[0158] ValueMeaningL1D_plp_channel_bonding_format(RF 1: L1D_rf_id = 0)L1D_plp_channel_bonding_format(RF 2: L1D_rf_id = 1)0000Fully plain channel bonding0001SNR averaged channel bonding for antenna 2 only(Plain channel bonding for antenna 1)0100SNR averaged channel bonding for antenna 1 only(Plain channel bonding for antenna 2)0101SNR averaged channel bonding for both antenna 1 and 20010N / A0011N / A0110N / A0111N / A1000N / A1001N / A1010N / A1011N / A1100N / A1101N / A1110N / A1111N / A

[0159] That is, in the example of Table 3, L1D_plp_channel_bonding_format for RF 1 and L1D_plp_channel_bonding_format for RF 2 can be assigned differently. In this case, L1D_plp_channel_bonding_format for RF 1 and L1D_plp_channel_bonding_format for RF 2 can be used in combination.

[0160] FIG. 6 is a flowchart illustrating a broadcast signal generation method for generating a broadcast signal when the channel bonding mode according to one embodiment of the present invention is an SNR averaging mode.

[0161] Referring to FIG. 6, a broadcast signal generation method for generating a broadcast signal when a channel bonding mode according to an embodiment of the present invention is an SNR averaging mode, comprises a MIMO (Multiple-Input Multiple-Output) precoded first polarization input pair (s 2i,1 , s2i,2 )(i is an integer greater than or equal to 0) to perform a cell exchange for the first exchange output pair (g 2i,1 , g 2i,2 ) is created (S610).

[0162] In addition, a broadcast signal generation method for generating a broadcast signal when the channel bonding mode according to one embodiment of the present invention is an SNR averaging mode, comprises a MIMO precoded second polarization input pair (s 2i+1,1 , s 2i+1,2 ) to perform a cell exchange for the second exchange output pair (g 2i+1,1 , g 2i+1,2 ) is created (S620).

[0163] At this time, the first exchange output pair may be set to be identical to the precoded first polarization input pair when the precoded first polarization input pair is an even number (i is 0 or even), and the second exchange output pair may be set to be identical to the precoded second polarization input pair when the precoded second polarization input pair is an even number (i is 0 or even).

[0164] At this time, the first exchange output pair may be set by crossing the first precoded polarization input pair when the first precoded polarization input pair is odd (i is odd), and the second exchange output pair may be set by crossing the second precoded polarization input pair when the second precoded polarization input pair is odd (i is odd).

[0165] At this time, step (S610) and step (S620) each correspond to a cell exchange matrix, and the cell exchange matrix corresponding to step (S610) and the cell exchange matrix corresponding to step (S620) may be the same.

[0166] At this time, step (S610) and step (S620) operate based on at least one of a channel bonding format field included in the L1 signaling information for the first RF and a channel bonding format field included in the L1 signaling information for the second RF, respectively, and the channel bonding format field can indicate one of a plain channel bonding mode and an SNR averaging channel bonding mode with 2 bits.

[0167] At this time, the channel bonding format field included in the L1 signaling information for the first RF and the channel bonding format field included in the L1 signaling information for the second RF may be set to be the same.

[0168] At this time, the time interleavers corresponding to the first exchange output pair and the second exchange output pair can correspond to a total memory requirement that is twice the total memory requirement for MIMO applied to a single RF channel and four times the total memory requirement of SISO (Single-Input Single-Output) applied to a single RF channel.

[0169] At this time, when the SNR averaging channel bonding mode is applied, the MIMO precoded first polarization input pair (s 2i,1 , s 2i,2 )'s first input (s) 2i,1 ) and the MIMO precoded second polarization input pair (s 2i+1,1 , s 2i+1,2 )'s first input (s) 2i+1,1 ) and the MIMO setting (same MIMO setting) that generates the first polarization input pair (s) of the MIMO precoded 2i,1 , s 2i,2 ) second input (s) 2i,2 ) and the MIMO precoded second polarization input pair (s 2i+1,1 , s 2i+1,2 ) second input (s)2i+1,2 ) can be the same MIMO settings.

[0170] In addition, a broadcast signal generation method for generating a broadcast signal when the channel bonding mode according to one embodiment of the present invention is an SNR averaging mode generates first RF MIMO signals and second RF MIMO signals transmitted through a first antenna unit and a second antenna unit using the first exchange output pair and the second exchange output pair (S630).

[0171] At this time, the first RF MIMO signals may correspond to the first RF, and the second RF MIMO signals may correspond to the second RF.

[0172] Figure 7 is a flowchart illustrating a broadcast signal receiving method according to one embodiment of the present invention.

[0173] Referring to FIG. 7, a broadcast signal receiving method according to an embodiment of the present invention receives first RF MIMO (Multiple-Input Multiple-Output) signals corresponding to a first RF and second RF MIMO signals corresponding to a second RF using a first polarization and a second polarization (S710).

[0174] At this time, the time interleavers corresponding to the first RF MIMO signals and the second RF MIMO signals can correspond to a total memory requirement that is twice the total memory requirement for MIMO applied to a single RF channel and four times the total memory requirement of SISO (Single-Input Single-Output) applied to a single RF channel.

[0175] At this time, the MIMO precoded first polarization input pair (s) corresponding to the first polarization 2i,1 , s 2i,2 )'s first input (s) 2i,1) and a MIMO precoded second polarization input pair (s) corresponding to the second polarization 2i+1,1 , s 2i+1,2 )'s first input (s) 2i+1,1 ) and a MIMO precoded first polarization input pair (s) corresponding to the first polarization. 2i,1 , s 2i,2 ) second input (s) 2i,2 ) and a MIMO precoded second polarization input pair (s) corresponding to the second polarization 2i+1,1 , s 2i+1,2 ) second input (s) 2i+1,2 ) can be the same when SNR averaging channel bonding mode is applied.

[0176] In addition, a broadcast signal receiving method according to one embodiment of the present invention restores a first preamble and a second preamble using the first RF MIMO signals and the second RF MIMO signals (S710).

[0177] At this time, the first preamble and the second preamble may include the same L1D_plp_channel_bonding_format field. That is, the channel bonding format field corresponding to the first preamble (included in L1 signaling for the first RF) and the channel bonding format field corresponding to the second preamble (included in L1 signaling for the second RF) may be set identically.

[0178] At this time, the first preamble and the second preamble may include different L1D_plp_channel_bonding_format fields.

[0179] In addition, a broadcast signal receiving method according to one embodiment of the present invention performs a reverse process of cell exchange based on a channel bonding format field corresponding to the first preamble and the second preamble (S730).

[0180] A transmission method that generates a transmission signal through a single transmission chain (through a transmission signal generation process similar to single-antenna transmission) without applying the MIMO method for spatial multiplexing can be referred to as a Non-MIMO method. In this case, the Non-MIMO method may include SISO (Single-Input Single-Output) and MISO (Multiple-Input Single-Output) transmission. In the following, Non-MIMO and SISO may be used interchangeably. In other words, SISO may be a concept that includes MISO.

[0181] The two RF channels to which channel bonding is applied may be referred to as a first RF channel and a second RF channel. At this time, at least one physical layer pipe included in a transmission frame transmitted through the first RF channel and at least one physical layer pipe included in a transmission frame transmitted through the second RF channel may be in a channel bonding relationship.

[0182] Although the examples in which all channel-bonded RF channels transmit MIMO signals through FIGS. 1 to 7 have been described, the MIMO method may be applied to one of the channel-bonded RF channels and the Non-MIMO (SISO) method may be applied to the other. In this case, when the Non-MIMO and MIMO RF channels are channel-bonded, the specific operations of the transmitter / receiver may vary depending on whether cell exchange is activated / deactivated and the combination of polarizations to which cell exchange is applied.

[0183] When RF channels of the Non-MIMO mode and the MIMO mode are channel bonded, i) plain channel bonding may be applied to the Non-MIMO stream and the MIMO stream so that cell exchange may not be performed, ii) SNR averaging may be applied between the Non-MIMO stream and the MIMO stream, but a cell exchange may be applied between the Non-MIMO stream of the first RF channel and the stream of the first polarization of the second RF channel, and the stream of the second polarization of the second RF channel may be output without cell exchange, iii) SNR averaging may be applied between the Non-MIMO stream and the MIMO stream, but a cell exchange may be applied between the Non-MIMO stream of the first RF channel and the stream of the second polarization of the second RF channel, and the stream of the first polarization of the second RF channel may be output without cell exchange, and iv) SNR averaging may be applied between the Non-MIMO stream and the MIMO stream. However, cell exchange may be applied between the Non-MIMO stream of the first RF channel, the stream of the first polarization of the second RF channel, and the stream of the second polarization of the second RF channel, so that data cells of the three streams may be exchanged. In this case, some operation modes, such as the operation mode of iv), may not be considered, especially in cases where cell exchange between the three streams is not easy.

[0184] For convenience of explanation, the channel through which the Non-MIMO stream is transmitted is described as the first RF channel and the channel through which the MIMO stream is transmitted is described as the second RF channel. However, depending on the embodiment, the Non-MIMO stream may be transmitted through the second RF channel and the MIMO stream may be transmitted through the first RF channel.

[0185] The four operating modes of i), ii), iii) and iv) described above may be signaled from the transmitter to the receiver via signaling information, or the operating modes of the transmitter / receiver may be specified so that the system operates in a fixed mode.

[0186] FIG. 8 is a diagram showing another example of a broadcast signal transmission device using multiple transmission antennas and channel bonding.

[0187] Referring to FIG. 8, a broadcast signal transmission device using multiple transmission antennas and channel bonding according to an embodiment of the present invention includes an input formatting unit (110), a stream distributor (120), a SISO signal generation unit (831), a second BICM unit (132), a second MIMO precoding unit (142), a cell exchanger (850), framing & interleaving units (163, 164, 861), and waveform generators (173, 174, 871).

[0188] Among the components illustrated in FIG. 8, the input formatting unit (110), the stream distributor (120), the second BICM unit (132), the second MIMO precoding unit (142), the framing & interleaving units (163, 164), and the waveform generators (173, 174) have already been sufficiently explained in the explanation through FIG. 1, so a repeated explanation will be omitted. At this time, although the MIMO demultiplexer and the constellation mapping unit of the second BICM unit (132) are illustrated separately in FIG. 8, these correspond to the MIMO MAP unit illustrated in FIG. 1.

[0189] The output of the input formatting unit (110) is separated into two streams through the stream distributor (120) and then input to the SISO signal generation unit (831) and the second BICM unit (132), respectively.

[0190] The SISO signal generation unit (831) generates a SISO (Single-Input Single-Output) signal. That is, the SISO signal generation unit (831) can perform BICM signal processing of a Non-MIMO signal (SISO signal) to be transmitted through the first RF channel.

[0191] At this time, the SISO signal generation unit (831) may include an FEC (Forward Error Correction) unit, a BIL (Bit Interleaver) unit, and a MAP (Mapping) unit. At this time, the FEC unit may apply channel coding to baseband packets to generate FEC frames, which are groups of bits. At this time, the channel coding may be a single-structure method, or may be a method composed of multiple stages, such as inner and outer coding. At this time, the BIL unit may perform bit interleaving on the FEC frames output from the FEC unit. At this time, the symbol MAP unit maps the output bits of the BIL unit to constellations corresponding to groups of bits corresponding to antenna outputs, and generates data cells (constellation signal stream) corresponding to the antenna outputs. As a result, the constellation signal stream output from the SISO signal generation unit (831) corresponds to the SISO signal.

[0192] The second BICM unit (132) corresponds to a MIMO signal generation unit and generates MIMO (Multiple-Input Multiple-Output) signals. That is, the second BICM unit (132) can perform BICM and MIMO mapping signal processing of MIMO signals to be transmitted to the second RF channel.

[0193] At this time, the two constellation signal streams output from the second BICM unit (132) correspond to MIMO signals. At this time, the two constellation signal streams correspond to the first polarization and the second polarization, respectively.

[0194] At this time, the two constellation signal streams output from the second BICM unit (132) are converted by the MIMO precoding process in the second MIMO precoding unit (142). At this time, the second MIMO precoding unit (142) outputs two output streams.

[0195] The cell exchanger (850) can be activated or deactivated depending on the channel bonding mode. In this case, when the cell exchanger (850) is deactivated, the input and output of the cell exchanger (850) can be identical without crossing.

[0196] When the cell exchanger (850) is activated, at least one of the two output streams of the second MIMO precoding unit (142) and the output stream of the SISO signal generation unit (831) are exchanged cell-by-cell in the cell exchanger (850). At this time, the cell exchanger (850) can apply cell exchange between the output stream of the SISO signal generation unit (831) and the stream of the first polarization of the second MIMO precoding unit (142). At this time, the cell exchanger (850) can apply cell exchange between the output stream of the SISO signal generation unit (831) and the stream of the second polarization of the second MIMO precoding unit (142).

[0197] The output of the cell exchanger (850) is one Non-MIMO stream and two MIMO streams, and the two MIMO streams correspond to the first polarization and the second polarization, respectively.

[0198] The Non-MIMO stream output through the cell exchanger (850) passes through the framing & interleaving unit (861) and the waveform generator (871) of the first RF channel and is output as a first RF SISO signal. At this time, the framing & interleaving unit (861) and the waveform generator (871) may form a first RF unit (881). At this time, the first RF unit (881) may generate a first RF SISO signal corresponding to the first RF channel among the first RF channel and the second RF channel that are channel bonded based on the SISO signal. The framing & interleaving unit (861) corresponds to each of the framing & interleaving units (161, 162, 163, 164) described in FIG. 1, and the waveform generator (871) corresponds to each of the waveform generators (171, 172, 173, 174) described in FIG. 1.

[0199] The two MIMO streams output through the cell exchanger (850) are output as second RF MIMO signals through the framing & interleaving units (163, 164) and waveform generators (173, 174) of the second RF channel. At this time, the framing & interleaving units (163, 164) and the waveform generators (173, 174) may form a second RF unit (882). At this time, the second RF unit (882) may generate second RF MIMO signals corresponding to the second RF channel based on the MIMO signals. At this time, the second RF MIMO signals may correspond to the first polarization and the second polarization of the second RF channel, respectively.

[0200] The first antenna (ANTENNA 1) and the second antenna (ANTENNA 2) may correspond to a first polarization and a second polarization, respectively. That is, the first antenna (ANTENNA 1) may correspond to a first polarization, and the second antenna (ANTENNA 2) may correspond to a second polarization. For example, the first polarization may be vertical polarization, and the second polarization may be horizontal polarization.

[0201] At this time, at least one of the first preamble corresponding to the first RF channel and the second preamble corresponding to the second RF channel may include a channel bonding format field corresponding to the channel bonding.

[0202] At this time, the channel bonding format field can indicate either a plain channel bonding mode or an SNR averaging channel bonding mode with 2 bits.

[0203] At this time, the physical layer pipe (PLP) (MIMO physical layer pipe) corresponding to the second RF MIMO signals and the physical layer pipe (SISO physical layer pipe) corresponding to the first RF SISO signal may be channel bonded only in the plain channel bonding mode and may not be channel bonded in the SNR averaging channel bonding mode.

[0204] At this time, the channel bonding format field may be set to “00” and may not be set to “01”.

[0205] At this time, the channel bonding format field included in the first preamble and the channel bonding format field included in the second preamble may be set identically.

[0206] At this time, when channel bonding of the SNR averaging channel bonding mode is used, the physical layer pipe corresponding to the first RF channel and the physical layer pipe corresponding to the second RF channel can use the same MIMO setting.

[0207] At this time, the MIMO settings may include not only the MIMO precoding settings but also whether or not MIMO is applied. That is, when the SNR averaging channel bonding mode is applied, MIMO may not be applied to the second RF channel when SISO is applied to the first RF channel.

[0208] At this time, when channel bonding of the SNR averaging channel bonding mode is used, the physical layer pipe (MIMO physical layer pipe) corresponding to the MIMO signals may not be channel bonded with the physical layer pipe (SISO physical layer pipe) corresponding to the SISO signal.

[0209] That is, channel bonding used with MIMO is not limited to channel bonding between MIMO PLPs, and channel bonding between SISO PLPs and MIMO PLPs is also possible. When plain channel bonding is used, the channel-bonded physical layer pipes may be composed of MIMO physical layer pipes and SISO physical layer pipes, each of which transmits on different RF channels. At this time, the BICM chain encoding the SISO PLP operates with the CONSTELLATION MAP illustrated in FIG. 8, etc., and the MIMO MAP illustrated in FIG. 1, etc. (MIMO CONSTELLATION MAP illustrated in FIG. 8, etc.) may be applied to MIMO PLPs on other RF channels. If SNR averaging channel bonding is applied, the MIMO physical layer pipe may be prohibited from being channel bonded with the SISO physical layer pipe in order to reduce the complexity of cell re-switching at the receiver.

[0210] Depending on the embodiment, the order of the second MIMO precoding unit (142) and the cell switch (850) illustrated in FIG. 8 may be changed.

[0211] FIG. 9 is a block diagram showing an example of a broadcast signal transmission device illustrated in FIG. 8 when plain channel bonding is applied.

[0212] Referring to FIG. 9, it can be seen that the cell exchanger (850) illustrated in FIG. 8 is omitted when plain channel bonding is applied.

[0213] At this time, no cell exchange occurs between the non-MIMO stream and the MIMO stream. At this time, the modulation mode of the first RF channel and the modulation mode of the second RF channel can be independently determined.

[0214] FIG. 10 is a block diagram showing an example of a broadcast signal transmission device illustrated in FIG. 8 when SNR averaging channel bonding is applied.

[0215] Referring to FIG. 10, when SNR averaging channel bonding is applied, cell exchange is performed between the Non-MIMO stream of the first RF channel and the first polarization (ANTENNA 1) stream of the second RF channel by the cell exchanger (1050).

[0216] That is, for the stream corresponding to the first polarization (ANTENNA 1) among the Non-MIMO stream (SISO signal) of the first RF channel and the MIMO streams (MIMO signals) of the second RF channel, data cells having even indices are output as is. For the stream corresponding to the first polarization (ANTENNA 1) among the Non-MIMO stream (SISO signal) of the first RF channel and the MIMO streams (MIMO signals) of the second RF channel, data cells having odd indices are output by exchanging the first RF channel and the second RF channel. That is, among the data cells having odd indices, the data cells corresponding to the output of the SISO signal generation unit (831) of the first RF channel can be input to the framing & interleaving unit (163) corresponding to the first polarization (ANTENNA 1) of the second RF channel, and the data cells corresponding to the output of the second MIMO precoding unit (142) of the second RF channel can be input to the framing & interleaving unit (861) of the first RF channel. At this time, the stream corresponding to the second polarization (ANTENNA 2) among the outputs of the second MIMO precoding unit (142) of the second RF channel can be input to the framing & interleaving unit (164) corresponding to the second polarization of the second RF channel without crossing.

[0217] In the example illustrated in FIG. 10, the constellation mapping order and coding rate of the first RF channel may be the same as the constellation mapping order and coding rate of the second RF channel.

[0218] Depending on the embodiment, the order of the second MIMO precoding unit (142) and the cell switch (1050) illustrated in FIG. 10 may be changed.

[0219] FIG. 11 is a block diagram showing another example of a broadcast signal transmission device illustrated in FIG. 8 when SNR averaging channel bonding is applied.

[0220] Referring to FIG. 11, when SNR averaging channel bonding is applied, cell exchange is performed between the Non-MIMO stream of the first RF channel and the second polarization (ANTENNA 2) stream of the second RF channel by the cell exchanger (1150).

[0221] That is, for the stream corresponding to the second polarization (ANTENNA 2) among the Non-MIMO stream (SISO signal) of the first RF channel and the MIMO streams (MIMO signals) of the second RF channel, data cells having even indices are output as is. For the stream corresponding to the second polarization (ANTENNA 2) among the Non-MIMO stream (SISO signal) of the first RF channel and the MIMO streams (MIMO signals) of the second RF channel, data cells having odd indices are output by exchanging the first RF channel and the second RF channel. That is, among the data cells having odd indices, the data cells corresponding to the output of the SISO signal generation unit (831) of the first RF channel can be input to the framing & interleaving unit (164) corresponding to the second polarization (ANTENNA 2) of the second RF channel, and the data cells corresponding to the output of the second MIMO precoding unit (142) of the second RF channel can be input to the framing & interleaving unit (861) of the first RF channel. At this time, the stream corresponding to the first polarization (ANTENNA 1) among the outputs of the second MIMO precoding unit (142) of the second RF channel can be input to the framing & interleaving unit (163) corresponding to the first polarization of the second RF channel without crossing.

[0222] In the example illustrated in FIG. 11, the constellation mapping order and coding rate of the first RF channel may be the same as the constellation mapping order and coding rate of the second RF channel.

[0223] Depending on the embodiment, the order of the second MIMO precoding unit (142) and the cell switch (1150) illustrated in FIG. 11 may be changed.

[0224] Fig. 12 is a block diagram showing another example of a broadcast signal transmission device using multiple transmission antennas and channel bonding.

[0225] Referring to FIG. 12, a broadcast signal transmission device using multiple transmission antennas and channel bonding according to an embodiment of the present invention includes an input formatting unit (110), a stream distributor (120), a SISO signal generation unit (831), a second BICM unit (132), a second MIMO precoding unit (142), a cell exchanger (850), framing & interleaving units (163, 164, 861), waveform generators (173, 174, 871), and an L1 (Layer 1) signaling generator (1210).

[0226] Among the components illustrated in FIG. 12, components other than the L1 signaling generator (1210) have already been sufficiently explained in the description through FIG. 8, so a repeated explanation will be omitted.

[0227] Since the broadcast signal transmission device illustrated in FIG. 12 includes a cell exchanger (850), information on whether this component is activated and / or information on cell exchange operation must be transmitted to the receiver.

[0228] That is, a receiver receiving a signal from a broadcast signal transmitting device as illustrated in FIG. 12 must obtain information about whether a cell exchanger (850) is activated in order to demodulate the received signal, and which of the first polarization stream and the second polarization stream of the second RF channel (RF 2) the activated cell exchanger (850) will be exchanged with.

[0229] Accordingly, information regarding whether the cell exchanger (850) is activated and / or information regarding cell exchange operation is provided to the L1 signaling generator (1210).

[0230] The L1 signaling generator (1210) receives information regarding whether the cell exchanger (850) is activated and / or information regarding a cell exchange operation, and based on the information, generates L1 signaling information for a first RF channel (RF 1) and L1 signaling information for a second RF channel (RF 2). At this time, the L1 signaling information for the first RF channel (RF 1) may be provided to the framing & interleaving unit (861), and the L1 signaling information for the second RF channel (RF 2) may be provided to the framing & interleaving units (163, 164).

[0231] At this time, the L1 signaling information for RF 1 and the L1 signaling information for RF 2 may include a channel bonding format field. At this time, the channel bonding format field may be an L1D_plp_channel_bonding_format field.

[0232] At this time, the channel bonding format field (L1D_plp_channel_bonding_format) included in the L1 signaling information for the first RF channel (RF 1) and the channel bonding format field (L1D_plp_channel_bonding_format) included in the L1 signaling information for the second RF channel (RF 2) may be set to be the same. At this time, the channel bonding format field (L1D_plp_channel_bonding_format) included in the L1 signaling information for the first RF channel (RF 1) and the channel bonding format field (L1D_plp_channel_bonding_format) included in the L1 signaling information for the second RF channel (RF 2) may be set to be different from each other.

[0233] At this time, the framing & interleaving units (861, 163, 164) can generate a preamble based on the L1 signaling information provided from the L1 signaling generator (1210). At this time, the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving unit (861) can be set to be the same as the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (163, 164). At this time, the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving unit (861) can also be set differently from the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (163, 164).

[0234] At this time, the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving unit (861) can be set in the same manner as Table 1 above, and the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (163, 164) can also be set in the same manner as Table 1 above. At this time, the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving unit (861) can be set to be identical to the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (163, 164).

[0235] If the L1D_plp_channel_bonding_format field is set in the same manner as Table 1, and the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving unit (861) is set to be the same as the L1D_plp_channel_bonding_format field included in the preamble generated by the framing & interleaving units (163, 164), the cell exchanger of the broadcast signal transmission device can be deactivated or activated.

[0236] In the example in Table 1, the channel bonding format field (L1D_plp_channel_bonding_format) is allocated 2 bits, but only two of the four available values ​​are used.

[0237] Information regarding the activation of the cell exchanger (850) and / or information regarding cell exchange operations must be transmitted to the receiver via L1 signaling. At this time, the reserved values ​​of L1D_plp_channel_bonding_format shown in Table 1 may be utilized.

[0238] The MIMO precoding unit(s) illustrated in FIG. 1, FIG. 5, FIG. 8 to FIG. 12, etc., may be activated or deactivated.

[0239] Channel bonding and MIMO can be independently applied to each physical layer pipe of each RF channel.

[0240] In order to signal information about whether a cell exchanger is activated and / or information about a cell exchange operation in the transmitter structure illustrated in FIG. 12, the channel bonding format field (L1D_plp_channel_bonding_format) of the first RF channel and the second RF channel may be used for each of the channel-bonded physical layer pipes, and the L1D_plp_channel_bonding_format for the first RF channel and the L1D_plp_channel_bonding_format for the second RF channel may be set to be identical.

[0241] At this time, by using the 2-bit L1D_plp_channel_bonding_format field as shown in Table 4 below, information on whether the cell exchanger is activated and / or information on the cell exchange operation can be derived with only one piece of L1D_plp_channel_bonding_format information.

[0242] ValueMeaning00Plain channel bonding01SNR averaged channel bonding between non-MIMO stream and MIMO polarization 1 stream10SNR averaged channel bonding between non-MIMO stream and MIMO polarization 2 stream11reserved

[0243] At this time, the same L1D_plp_channel_bonding_format value can be assigned to both the first RF channel and the second RF channel for the channel-bonded physical layer pipes.

[0244] At this time, if the syntax table of Table 4 is used and 00 is assigned to L1D_plp_channel_bonding_format, the cell exchanger (850) may be omitted in the example shown in FIG. 12.

[0245] At this time, by using the 2-bit L1D_plp_channel_bonding_format field as shown in Table 5 below, information on whether the cell exchanger is activated and / or information on the cell exchange operation can be derived using only one piece of L1D_plp_channel_bonding_format information.

[0246] ValueMeaning00Plain channel bonding01SNR averaged channel bonding between non-MIMO stream and MIMO polarization 1 stream10SNR averaged channel bonding between non-MIMO stream and MIMO polarization 2 stream11SNR averaged channel bonding among non-MIMO stream, MIMO polarization 1 stream, and MIMO polarization 2 stream

[0247] In the example of Table 5, when 11 is assigned to L1D_plp_channel_bonding_format, cell exchange may be applied to the Non-MIMO stream of the first RF channel and the first polarization stream and the second polarization stream of the second RF channel, and data cell exchange may occur between the three streams.

[0248] At this time, by using the 2-bit L1D_plp_channel_bonding_format field as shown in Table 6 below, information on whether the cell exchanger is activated and / or information on the cell exchange operation can be derived using only one piece of L1D_plp_channel_bonding_format information.

[0249] ValueMeaning00Plain channel bonding01SNR averaged channel bonding between non-MIMO stream and MIMO polarization 1 stream10reserved11reserved

[0250] In the example of Table 6, it can be seen that when SNR averaging channel bonding is used, only the Non-MIMO stream of the first RF channel and the first polarization stream of the second RF channel can be cell-switched.

[0251] At this time, by using the 2-bit L1D_plp_channel_bonding_format field as shown in Table 7 below, information on whether the cell exchanger is activated and / or information on the cell exchange operation can be derived using only one piece of L1D_plp_channel_bonding_format information.

[0252] ValueMeaning00Plain channel bonding01SNR averaged channel bonding between non-MIMO stream and MIMO polarization 2 stream10reserved11reserved

[0253] In the example of Table 7, it can be seen that when SNR averaging channel bonding is used, only the Non-MIMO stream of the first RF channel and the second polarization stream of the second RF channel can be cell-switched.

[0254] At this time, by using the 2-bit L1D_plp_channel_bonding_format field as shown in Table 8 below, information on whether the cell exchanger is activated and / or information on the cell exchange operation can be derived using only one piece of L1D_plp_channel_bonding_format information.

[0255] ValueMeaning00Plain channel bonding01SNR averaged channel bonding among non-MIMO stream, MIMO polarization 1 stream, and MIMO polarization 2 stream10reserved11reserved

[0256] In the example of Table 8, it can be seen that when SNR averaging channel bonding is used, the Non-MIMO stream of the first RF channel, the first polarization stream of the second RF channel, and the second polarization stream of the second RF channel can be cell-switched.

[0257] The first RF channel and the second RF channel that are channel bonded can each transmit a preamble signal, and the L1 signaling information included in the preamble of the first RF channel and the L1 signaling information included in the preamble of the second RF channel may be the same or different.

[0258] Therefore, by combining the L1D_plp_channel_bonding_format of the L1 signaling information included in the preamble of the first RF channel and the L1D_plp_channel_bonding_format of the L1 signaling information included in the preamble of the second RF channel, information on whether the cell switch is activated and / or information on the cell switching operation can be derived. That is, in this case, the receiver must check both the L1D_plp_channel_bonding_format included in the preamble of the first RF channel and the L1D_plp_channel_bonding_format included in the preamble of the second RF channel.

[0259] At this time, L1D_plp_channel_bonding_format included in the preamble of the first RF channel and L1D_plp_channel_bonding_format included in the preamble of the second RF channel may be set to different values.

[0260] At this time, by using the 2-bit L1D_plp_channel_bonding_format field as shown in Table 9 below, information on whether the cell exchanger is activated and / or information on the cell exchange operation can be derived by combining two L1D_plp_channel_bonding_format values.

[0261] ValueMeaningL1D_plp_channel_bonding_format(RF 1: L1D_rf_id = 0)L1D_plp_channel_bonding_format(RF 2: L1D_rf_id = 1)0000Fully plain channel bonding0001SNR averaged channel bonding between non-MIMO stream and MIMO polarization 1 stream0010SNR averaged channel bonding between non-MIMO stream and MIMO polarization 2 stream0011SNR averaged channel bonding among non-MIMO stream, MIMO polarization 1 stream, and MIMO polarization 2 stream0100N / A0101N / A0110N / A0111N / A1000N / A1001N / A1010N / A1011N / A1100N / A1101N / A1110N / A1111N / A

[0262] At this time, by using the 2-bit L1D_plp_channel_bonding_format field as shown in Table 10 below, information on whether the cell exchanger is activated and / or information on the cell exchange operation can be derived by combining two L1D_plp_channel_bonding_format values.

[0263] ValueMeaningL1D_plp_channel_bonding_format(RF 1: L1D_rf_id = 0)L1D_plp_channel_bonding_format(RF 2: L1D_rf_id = 1)0000Fully plain channel bonding0001SNR averaged channel bonding between non-MIMO stream and MIMO polarization 1 stream0010SNR averaged channel bonding between non-MIMO stream and MIMO polarization 2 stream0011N / A0100N / A0101N / A0110N / A0111N / A1000N / A1001N / A1010N / A1011N / A1100N / A1101N / A1110N / A1111N / A

[0264] At this time, by using the 2-bit L1D_plp_channel_bonding_format field as shown in Table 11 below, information on whether the cell exchanger is activated and / or information on the cell exchange operation can be derived by combining two L1D_plp_channel_bonding_format values.

[0265] ValueMeaningL1D_plp_channel_bonding_format(RF 1: L1D_rf_id = 0)L1D_plp_channel_bonding_format(RF 2: L1D_rf_id = 1)0000Fully plain channel bonding0001SNR averaged channel bonding between non-MIMO stream and MIMO polarization 1 stream0010N / A0011N / A0100N / A0101N / A0110N / A0111N / A1000N / A1001N / A1010N / A1011N / A1100N / A1101N / A1110N / A1111N / A

[0266] At this time, by using the 2-bit L1D_plp_channel_bonding_format field as shown in Table 12 below, information on whether the cell exchanger is activated and / or information on the cell exchange operation can be derived by combining two L1D_plp_channel_bonding_format values.

[0267] ValueMeaningL1D_plp_channel_bonding_format(RF 1: L1D_rf_id = 0)L1D_plp_channel_bonding_format(RF 2: L1D_rf_id = 1)0000Fully plain channel bonding0001SNR averaged channel bonding between non-MIMO stream and MIMO polarization 2 stream0010N / A0011N / A0100N / A0101N / A0110N / A0111N / A1000N / A1001N / A1010N / A1011N / A1100N / A1101N / A1110N / A1111N / A

[0268] At this time, by using the 2-bit L1D_plp_channel_bonding_format field as shown in Table 13 below, information on whether the cell exchanger is activated and / or information on the cell exchange operation can be derived by combining two L1D_plp_channel_bonding_format values.

[0269] ValueMeaningL1D_plp_channel_bonding_format(RF 1: L1D_rf_id = 0)L1D_plp_channel_bonding_format(RF 2: L1D_rf_id = 1)0000Fully plain channel bonding0001SNR averaged channel bonding among non-MIMO stream, MIMO polarization 1 stream, and MIMO polarization 2 stream0010N / A0011N / A0100N / A0101N / A0110N / A0111N / A1000N / A1001N / A1010N / A1011N / A1100N / A1101N / A1110N / A1111N / A

[0270] The order of the L1D_plp_channel_bonding_format values ​​and meanings in Tables 1 to 13 described above may change.

[0271] In some embodiments, when a broadcast signal transmission device having the structure illustrated in FIG. 12 is used to perform channel bonding between a non-MIMO signal and a MIMO signal, the use of cell switching may be disallowed. That is, when channel bonding is performed between a non-MIMO signal and a MIMO signal, the use of the SNR averaging channel bonding mode may be disallowed. This may mean that, when multiple antenna transmission and SNR averaging channel bonding are used together, the same MIMO settings (parameters) must be applied to the first RF channel and the second RF channel that are coupled together.

[0272] When channel bonding is applied with multi-antenna transmission, the receiver can derive information from L1 signaling information about whether the physical layer pipe received on each RF channel or the subframe containing that physical layer pipe uses MIMO.

[0273] Therefore, it is possible to derive whether the physical layer pipes combined through channel bonding are a combination of non-MIMO and MIMO or a combination of MIMO and MIMO.

[0274] By combining this derived information with the L1D_plp_channel_bonding_format (and L1D_rf_id, if required) values, we can accurately determine the operating mode of channel bonding used with multi-antenna transmission.

[0275] In particular, when a broadcast signal transmission device having the structure illustrated in FIG. 12 is used, there may be difficulties in performing cell exchange evenly since there are a total of three related transmission streams. For example, it may be avoided that only a specific antenna stream utilizes cell exchange. That is, when the first polarization stream or the second polarization stream among the non-MIMO stream and the MIMO stream is cell-exchanged, one stream to which cell exchange is not applied is generated, so the actual effect of SNR averaging may not be significant.

[0276] Considering this, the use of SNR averaging may be prohibited when channel bonding is performed between non-MIMO and MIMO streams. This may mean that when multi-antenna transmission and SNR averaging channel bonding are used together, the same MIMO parameter(s) must be applied to the first and second RF channels being channel bonded.

[0277] When configuring LDM multiplexing including MIMO transmission signals, the SISO method can be applied to the core layer and MIMO can be applied only to the enhanced layer, considering compatibility with existing single-antenna receivers.

[0278] At this time, the SISO signal of the core layer is transmitted only through one of the two MIMO antennas, and the other MIMO antenna may not transmit the core layer signal.

[0279] At this time, two MIMO antennas may transmit the SISO signal of the same core layer in the core layer and may transmit two MIMO signals each in the enhanced layer.

[0280] That is, the SISO signal transmitted to the core layer may be transmitted through only one antenna, or the SISO signal transmitted to the core layer may be transmitted through both antennas.

[0281] When LDM and MIMO technologies are used together in this combined form of SISO and MIMO, backward compatibility with existing SISO receivers must be guaranteed, so L1 signaling must be applicable to both SISO and MIMO receivers. Therefore, from the perspective of existing SISO receivers, L1 signaling fields must be transmitted in the same manner as in the existing SISO transmission method to ensure normal operation of the SISO receiver.

[0282] Fig. 13 is a block diagram showing an example of a broadcast signal transmission device according to one embodiment of the present invention.

[0283] Figure 13 shows an example of a transmitter configuration in which a SISO signal is transmitted through a core layer and a MIMO signal is transmitted through an enhanced layer.

[0284] Referring to FIG. 13, a broadcast signal transmission device according to an embodiment of the present invention includes a core layer signal generation unit (1310), an enhanced layer MIMO signal generation unit (1320), an LDM combining unit (1330), and a transmission signal generation unit (1340).

[0285] The core layer signal generation unit (1310) generates a core layer signal (SISO signal).

[0286] The core layer signal generation unit (1310) includes an input formatting unit (1311) and a core layer BICM (Bit-Interleaved Coded Modulation) unit (1312).

[0287] The input formatting unit (1311) generates packetized data (baseband packets) in units of processing blocks of the transmitting system. At this time, the transmitting system can classify packets to which the same BICM (Bit Interleaved Coded Modulation) and transmission signal generation parameters are applied and define them as the same PLP (Physical Layer Pipe).

[0288] The core layer BICM unit (1312) may include an FEC (Forward Error Correction) unit, a BIL (Bit Interleaver) unit, and a symbol mapping unit. At this time, the FEC unit may apply channel coding to baseband packets to generate FEC frames (FEC packets), which are groups of bits. At this time, the channel coding may be a single-structure method, or may be a method composed of multiple stages, such as inner and outer coding. At this time, the BIL unit may perform bit interleaving on the FEC frames output from the FEC unit. At this time, the symbol mapping unit may generate data cells for transmitting the output to be transmitted through the antenna for the output bit string of the BIL unit, and output them as core layer signals.

[0289] The enhanced layer MIMO signal generation unit (1320) generates enhanced layer MIMO (Multiple Input Multiple Output) signals.

[0290] The enhanced layer MIMO signal generation unit (1320) includes an input formatting unit (1321), an enhanced layer BICM unit (1322), and a MIMO precoder (1323).

[0291] The input formatting unit (1321) generates packetized data (baseband packets) in units of processing blocks of the transmitting system. At this time, the transmitting system can classify packets to which the same BICM (Bit Interleaved Coded Modulation) and transmission signal generation parameters are applied and define them as the same PLP (Physical Layer Pipe).

[0292] The enhanced layer BICM unit (1322) may include an FEC (Forward Error Correction) unit, a BIL (Bit Interleaver) unit, and a MIMO (Multi-Input Multi-Output) MAP (mapping) unit. At this time, the FEC unit may apply channel coding to baseband packets to generate FEC frames, which are groups of bits. At this time, the channel coding may be a single-structure method, or may be a method composed of multiple stages, such as inner and outer coding. At this time, the BIL unit may perform bit interleaving on the FEC frames output from the FEC unit. At this time, the MIMO MAP unit may generate data cells for transmitting the output to each of the multiple antennas for the output bit string of the BIL unit. For this purpose, the MIMO MAP unit may be composed of two detailed blocks: a demultiplexer unit and a bit to IQ mapping unit. At this time, the demultiplexer unit can group the input bit stream according to the modulation order and the number of multiple antennas in order to convert the input bit stream into data cells. At this time, the bit stream corresponding to each group may be different depending on the modulation order and the number of multiple antennas. The bit-to-IQ mapping unit maps the output of the demultiplexer unit to constellations corresponding to groups of bits corresponding to each antenna output, and generates data cells corresponding to each antenna output. In one embodiment, even-numbered bits in a bit group can be mapped to data cells for the first antenna (first polarization), and odd-numbered bits can be mapped to data cells for the second antenna (second polarization). At this time, the grouping of each bit in the MIMO MAP unit or the constellation mapping of the bits using the same can be performed using various methods not illustrated. At this time, the first polarization can be vertical polarization, and the second polarization can be horizontal polarization.

[0293] Here, polarization can be the orientation of the electric field vector of a radiated electromagnetic wave with respect to the horizon as seen from the antenna. In other words, polarization can describe the orientation of the wave emitted from. This orientation can be planar or circular.

[0294] Hereinafter, the first antenna may be replaced with the first polarization and the second antenna may be replaced with the second polarization.

[0295] Two groups of data cells are input to the MIMO precoder (1323).

[0296] At this time, the MIMO precoder (1323) may include a streaming combiner, an IQ polarization interleaving unit, and a phase hopping unit. At this time, the stream combiner may combine two data cells inputted and output them. At this time, the IQ polarization interleaving unit may exchange the quadrature components of the two data cells inputted and output them. At this time, the phase hopping unit may change the phase of the data cells inputted and output them. At this time, all three sub-blocks may be activated and operated, all may be deactivated and operated, or only some of the blocks may be activated and operated. In addition, each sub-block may output a different signal or the same signal depending on the channel coding rate and modulation order applied to the data cells inputted to each sub-block. The MIMO precoder (1323) illustrated in FIG. 13 can output two data cells to be output through the first antenna (first polarization) and the second antenna (second polarization).

[0297] The LDM combiner (1330) hierarchically multiplexes one of the core layer signal and the enhanced layer MIMO signals to output a first polarization signal corresponding to the first polarization (first antenna), and outputs the other one of the enhanced layer MIMO signals as a second polarization signal corresponding to the second polarization (second antenna).

[0298] At this time, the LDM coupling unit (1330) can output the second polarization signal with unity power.

[0299] The transmission signal generation unit (1340) generates a first polarization transmission signal using the first polarization signal, and generates a second polarization transmission signal using the second polarization signal.

[0300] The transmission signal generation unit (1340) includes framing & interleaving units (1341, 1342) and waveform generators (1345, 1346).

[0301] Time interleaving, frame generation (including preamble), and frequency interleaving can be performed in the framing & interleaving unit (1341) on the first polarization signal output through the LDM combining unit (1330). The output of the framing & interleaving unit (1341) is input to the waveform generator (1345) and output to the first antenna as the first polarization transmission signal.

[0302] Time interleaving, frame generation (including preamble), and frequency interleaving can be performed in the framing & interleaving unit (1342) on the second polarization signal output through the LDM combining unit (1330). The output of the framing & interleaving unit (1342) is input to the waveform generator (1346) and output to the second antenna as the second polarization transmission signal.

[0303] The framing & interleaving units (1341, 1342) illustrated in FIG. 13 can generate signals corresponding to frames to be transmitted via antennas using data cells inputted as inputs. At this time, the framing & interleaving units (1341, 1342) may or may not activate and perform time interleaving for each input data cell. At this time, the framing & interleaving units (1341, 1342) may perform framing for configuring preamble symbols and subframes for each data cell. At this time, the preamble symbol may not include a data cell. At this time, frequency interleaving may or may not be activated and applied.

[0304] Depending on the embodiment, the first polarization transmission signal and the second polarization transmission signal may each include a preamble, but only one of them may include a preamble.

[0305] If the first polarization transmission signal includes a first preamble and the second polarization transmission signal includes a second preamble, the first preamble and the second preamble may each include a 1-bit L1B_mimo_scattered_pilot_encoding field set to 0. Furthermore, the first preamble and the second preamble may include the same L1 signaling information.

[0306] If only one of the first polarization transmission signal and the second polarization transmission signal includes a preamble, this preamble can be applied not only to the polarization (antenna) transmitting the preamble but also to the other polarization (antenna). For example, if only the first polarization transmission signal includes a preamble, the signaling fields included in this preamble can be used by both the first polarization and the second polarization.

[0307] The grouped data cells, which are outputs of the framing & interleaving units (1341, 1342), are input to the waveform generators (1345, 1346). At this time, the waveform generators (1345, 1346) may each perform an inverse fast Fourier transform (IFFT) after pilot insertion and insert a guard interval symbol. In addition, the waveform generators (1345, 1346) may each generate a bootstrap symbol and output it by positioning it at the very beginning of the transmission frame.

[0308] In particular, the waveform generator (1346) may apply power scaling for the second polarization in the IFFT stage according to an injection level corresponding to the second polarization (which may be the same as the injection level corresponding to the first polarization). At this time, the power of the second polarization transmission signal may be lower than the power of the first polarization transmission signal.

[0309] Information about the scattered pilots inserted through the waveform generators (1345, 1346) may be included in the preamble generated by the framing & interleaving units (1341, 1342).

[0310] FIG. 14 is a block diagram showing an example of the LDM coupling unit (1330) illustrated in FIG. 13.

[0311] Referring to FIG. 14, the LDM coupling unit (1330) includes an injection level controller (1410), a coupler (1420), and a power normalizer (1430).

[0312] The LDM coupling unit (1330) is a core layer signal (S C ) and enhanced layer MIMO signals (S E,1 , S E,2 ) one of (S E,1 ) is hierarchically divided into multiplexes to generate the first polarization signal (β(S) corresponding to the first polarization (POLARIZATION #1). C + αSE,1 )) and output enhanced layer MIMO signals (S E,1 , S E,2 ) another one (S) E,2 ) is output as a second polarization signal corresponding to the second polarization.

[0313] The injection level controller (1410) provides enhanced layer MIMO signals (S) for hierarchical division multiplexing. E,1 , S E,2 ) one of (S E,1 ) to control the power.

[0314] The coupler (1420) is a core layer signal (S C ) and one of the enhanced layer signals (αS) whose power is controlled by the injection level controller (1410). E,1 ) are combined.

[0315] The power normalizer (1430) performs transmission power normalization and outputs a first polarization signal.

[0316] In this way, the LDM combining unit illustrated in Fig. 14 combines the core layer signal and the enhanced layer signal through hierarchical division multiplexing for the first polarization, but for the second polarization, the combination of the two layer signals through hierarchical division multiplexing is not performed and the input MIMO signal (S E,2 ) is output as is. That is, in the structure illustrated in FIG. 14, constellation-superposed signals are transmitted only in the first polarization (POLARIZATION #1), and the second polarization (POLARIZATION #2) can transmit a dedicated MIMO stream composed solely of enhanced layer cells.

[0317] At this time, in the first polarization, at least one SISO (Single Input Single Output) PLP (Physical Layer Pipe) and at least one MIMO PLP superposed with the at least one SISO PLP can share pilot cells. That is, the SISO PLP(s) and MIMO PLP(s) superposed by the broadcast signal transmission apparatus illustrated in FIGS. 13 and 14 can share pilot cells transmitted through the first polarization (first antenna). This can be viewed as the pilot cells transmitted through the first polarization (first antenna) of the broadcast signal transmission apparatus illustrated in FIGS. 13 and 14 are shared by the core layer used for SISO transmission and the enhanced layer used for MIMO transmission.

[0318] At this time, the first polarization transmission signal and the second polarization transmission signal may be generated using only the first MIMO distributed pilot encoding among the first MIMO distributed pilot encoding that transmits pilots to the same OFDM cell positions for the first polarization and the second polarization, and the second MIMO distributed pilot encoding that transmits pilots to different OFDM cell positions for the first polarization and the second polarization.

[0319] At this time, the first MIMO distributed pilot encoding may correspond to a first group in which identical pilots are transmitted for the first polarization and the second polarization, and a second group in which pilots with opposite phases are transmitted for the first polarization and the second polarization.

[0320] At this time, the second MIMO distributed pilot encoding may correspond to a first group in which only pilots for the first polarization are transmitted with valid power and pilots for the second polarization are transmitted with null power, and a second group in which only pilots for the second polarization are transmitted with valid power and pilots for the first polarization are transmitted with null power.

[0321] At this time, the first MIMO distributed pilot encoding may be Walsh-Hadamard encoding, and the second MIMO distributed pilot encoding may be null pilot encoding.

[0322] At this time, at least one of the first polarization transmission signal and the second polarization transmission signal may include a preamble. At this time, the preamble may include a 1-bit L1B_mimo_scattered_pilot_encoding field set to 0.

[0323] At this time, the 1-bit L1B_mimo_scattered_pilot_encoding field set to 0 can indicate both a MIMO pilot pattern with Walsh-Hadamard encoding and the SISO pilot pattern simultaneously.

[0324] In this way, when considering a conventional single-antenna receiver in a broadcast signal transmitter that uses LDM and MIMO together, a collision may occur between the pilot pattern for the MIMO terminal and the pilot pattern for the SISO terminal (between the signaling information of the pilot pattern for the MIMO terminal and the signaling information of the pilot pattern for the SISO terminal).

[0325] In the ATSC 3.0 broadcast system, L1B_first_sub_scattered_pilot_pattern (for the first subframe) and L1D_scattered_pilot_pattern (for other subframes) are used as scattered pilot pattern identification fields, and the scattered pilot pattern is signaled through these fields.

[0326] These fields are signaling fields commonly used for SISO transmission and MIMO transmission, and the receiver can distinguish whether it is a SISO distributed pilot pattern or a MIMO distributed pilot pattern by combining these fields with other MIMO-related fields (e.g., L1B_first_sub_mimo (for the first subframe) and L1D_mimo (for other subframes)) and then find out the exact distributed pilot pattern.

[0327] At this time, L1B_first_sub_mimo and L1D_mimo can indicate whether MIMO transmission is applied to the corresponding subframe.

[0328] That is, even if L1B_first_sub_scattered_pilot_pattern or L1D_scattered_pilot_pattern has the same value, depending on whether it is SISO transmission or MIMO transmission, the scattered pilot pattern may be interpreted as a SISO pattern as in Table 14 below, or as a MIMO pattern as in Table 15 below.

[0329] ValueSP patternValueSP patternValueSP pattern00000SP3_201000SP12_210000Reserved00001SP3_401001SP12_4......00010SP4_201010SP16_2......00011SP4_401011SP16_4.. ....00100SP6_201100SP24_2......00101SP6_401101SP24_4......00110SP8_201110SP32_2......00111SP8_401111SP32_411111Reserved

[0330] Table 14 shows the signaling formats of L1D_scattered_pilot_pattern and L1B_first_sub_scattered_pilot_pattern for SISO.

[0331] ValueSP patternValueSP patternValueSP pattern00000MP3_201000MP12_210000Reserved00001MP3_401001MP12_4......00010MP4_201010MP16_2......00011MP4_401011MP16_4.. ....00100MP6_201100MP24_2......00101MP6_401101MP24_4......00110MP8_201110MP32_2......00111MP8_401111MP32_411111Reserved

[0332] Table 15 shows the signaling formats of L1D_scattered_pilot_pattern and L1B_first_sub_scattered_pilot_pattern for MIMO.

[0333] In Tables 14 and 15, SP represents SISO Pilot, and MP represents MIMO Pilot.

[0334] Ultimately, when combining LDM and MIMO technologies to transmit SISO and MIMO signals in the same subframe, considering the existing SISO receiver, both the SISO receiver and the MIMO receiver must be able to simultaneously receive accurate scattered pilot pattern information through a common signaling field, L1B_first_sub_scattered_pilot_pattern or L1D_scattered_pilot_pattern. This means that L1B_first_sub_scattered_pilot_pattern or L1D_scattered_pilot_pattern must be compatible with both SISO and MIMO.

[0335] For example, if L1B_first_sub_scattered_pilot_pattern or L1D_scattered_pilot_pattern is 00000, the SISO receiver must perform channel estimation through SP3_2 in Table 14, and the MIMO receiver must perform channel estimation through MP3_2 in Table 15.

[0336] In order to receive a MIMO transmission signal, it is necessary to estimate the first polarization channel and the second polarization channel separately, and therefore, distinguishable pilot signals are transmitted to both the first polarization (first antenna) and the second polarization (second antenna).

[0337] The MIMO distributed pilot pattern used in ATSC 3.0 systems is defined using either Walsh-Hadamard encoding or null-pilot encoding.

[0338] The pilot pattern corresponding to Walsh-Hadamard encoding is such that both the first polarization and the second polarization transmit their respective pilots at the same OFDM cell locations. That is, Walsh-Hadamard encoding designs the sequences corresponding to the pilots for the first polarization and the sequences corresponding to the pilots for the second polarization to be orthogonal, so that only the corresponding pilots can be extracted from each transmission channel.

[0339] The pilot pattern corresponding to the null pilot encoding is such that the second polarization is muted at the position where the first polarization transmits the pilot, and the first polarization is muted at the position where the second polarization transmits the pilot.

[0340] Comparing the SISO distributed pilot pattern, the MIMO Walsh-Hadamard distributed pilot pattern, and the MIMO null-pilot distributed pilot pattern signaled with the same 5-bit value in Tables 14 and 15 above, the following relationship can be confirmed.

[0341] The first polarization (first antenna) portion of the MIMO Walsh-Hadamard distributed pilot pattern transmits pilot signals identical to the SISO distributed pilot pattern to the same OFDM cell location.

[0342] The first polarization (first antenna) portion of the MIMO null-pilot distributed pilot pattern transmits pilot signals at only half of the pilot positions of the SISO distributed pilot pattern.

[0343] This relationship can be summarized as shown in Table 16 below.

[0344] Pilot EncodingAlgorithmAntennaScatteredPilotSubframeBoundaryPilotCommonContinualPilotAdditionalContinualPilotEdgePilotWalsh-Hadamard#1SISOSISOSISOSISOSISO#2WHWHSISOSISO / WHWHNull Pilot#1NPSISOSISOSISO / NPSISO#2NPWHSISOSISO / NPWH

[0345] In Table 16, WH represents Walsh-Hadamard and NP represents Null Pilot.

[0346] Figures 15, 16 and 17 illustrate SISO scattered pilot patterns, MIMO Walsh-Hadamard scattered pilot patterns and MIMO null-pilot scattered pilot patterns when 5-bit L1B_first_sub_scattered_pilot_pattern or L1D_scattered_pilot_pattern is 00000.

[0347] Figure 15 is a diagram showing an example of a SISO distributed pilot pattern corresponding to SP3_2.

[0348] Referring to Figure 15, D for SISO X = 3 and D Y = You can find out the pilot positions in case 2.

[0349] Fig. 16 is a diagram showing an example of a Walsh-Hadamard encoded MIMO distributed pilot pattern corresponding to MP3_2.

[0350] Referring to FIG. 16, it can be seen that the OFDM cell locations of the SISO distributed pilot pattern corresponding to SP3_2 and the OFDM cell locations of the Walsh-Hadamard encoded MIMO distributed pilot pattern corresponding to MP3_2 are basically the same.

[0351] The Walsh-Hadamard encoded MIMO distributed pilot pattern illustrated in FIG. 16 transmits the same pilots as illustrated in FIG. 15 in both group 1 positions and group 2 positions for the first polarization. At this time, for the second polarization, the same pilots as those for the first polarization are transmitted in group 1 positions, and pilots that are opposite in phase to the pilots for the first polarization are transmitted in group 2 positions.

[0352] That is, in the Walsh-Hadamard encoded MIMO distributed pilot pattern illustrated in FIG. 16, the same pilots as the SISO distributed pilot pattern illustrated in FIG. 15 are transmitted in the first polarization, and in the second polarization, only some pilots are transmitted with their phases reversed at the same positions as the SISO distributed pilot pattern illustrated in FIG. 15.

[0353] FIG. 17 is a diagram showing an example of a null pilot encoded MIMO distributed pilot pattern corresponding to MP3_2.

[0354] Referring to FIG. 17, it can be seen that the OFDM cell locations of the Walsh-Hadamard encoded MIMO distributed pilot pattern corresponding to MP3_2 are basically the same as the OFDM cell locations of the null-pilot encoded MIMO distributed pilot pattern corresponding to MP3_2, except that the grouping is different.

[0355] However, the null-pilot encoded MIMO distributed pilot pattern illustrated in FIG. 17 transmits pilots only at group 1 positions for the first polarization, and transmits pilots only at group 2 positions for the second polarization.

[0356] That is, the null-pilot encoded MIMO distributed pilot pattern illustrated in FIG. 17 transmits pilot signals only at half of the pilot positions (group 1 positions) of the SISO distributed pilot pattern distributed pilot pattern illustrated in FIG. 15 in the first polarization. Similarly, the null-pilot encoded MIMO distributed pilot pattern transmits pilot signals only at the other half of the pilot positions (group 2 positions) of the SISO distributed pilot pattern distributed pilot pattern illustrated in FIG. 15 in the second polarization.

[0357] In a broadcast signal transmission / reception system combining LDM and MIMO, the core layer and the enhanced layer may need to use the same pilot signal to prevent increased receiver complexity and reduce the burden of receiver memory usage.

[0358] The broadcast signal transmitter having the structure described through FIGS. 13 and 14 transmits a broadcast signal combining SISO and MIMO, taking into account a conventional single-antenna receiver, and the single-antenna receiver can only receive the first polarization signal. In such an environment, if a null pilot pattern is applied as a distributed pilot pattern, the SISO receiver will use the interference signal transmitted in the second polarization for pilot-based channel estimation using the corresponding PLP (Physical Layer Pipe), which may result in misestimation.

[0359] Meanwhile, when transmitting a broadcast signal combining SISO and MIMO by combining LDM and MIMO technologies, if a null-pilot pattern is applied, a conflict may occur with the L1-basic and L1-detail signaling for the existing SISO service.

[0360] The existing ATSC 3.0 broadcast system sets the L1B_mimo_scattered_pilot_encoding field (L1-Basic signaling field) to 0 in the following two cases.

[0361] - When the Walsh-Hadamard pilot pattern is used

[0362] - If there is no subframe with MIMO applied within the transmission frame

[0363] When receiving a subframe that combines SISO and MIMO by combining LDM and MIMO technologies, it may be desirable for the SISO receiver to be unaware of the presence of the enhanced layer transmitted in the form of MIMO. Therefore, in this case, L1B_first_sub_mimo (for the first subframe) or L1D_mimo (for other subframes) should be set to 0. In this case, L1B_first_sub_mimo and L1D_mimo may be fields indicating whether MIMO is applied to the corresponding subframe (in principle, they are set to 1 if MIMO is applied). In this way, even though MIMO is applied to the enhanced layer, if L1B_first_sub_mimo (for the first subframe) or L1D_mimo (for other subframes) is set to 0, the MIMO receiver may operate based on other MIMO-related fields other than these fields to identify the MIMO pilot pattern.

[0364] When the core layer transmits a SISO signal and only the enhanced layer applies MIMO, there may be no MIMO subframes in the transmission frame other than the subframes in which SISO and MIMO are combined with LDM, and there may be MIMO subframes in the transmission frame other than the subframes in which SISO and MIMO are combined with LDM.

[0365] If there are no MIMO subframes in a transmission frame other than the subframes in which SISO and MIMO are combined with LDM, and a null-pilot pattern is applied to the subframes in which SISO and MIMO are combined with LDM, and L1B_mimo_scattered_pilot_encoding must be set to 1, then this is not desirable because it causes a conflict with L1B_first_sub_mimo or L1D_mimo set to 0 in the received preamble from the perspective of the existing SISO receiver.

[0366] In the case where a MIMO subframe exists in a transmission frame other than the subframes in which SISO and MIMO are LDM-combined, a signaling collision may not occur if other MIMO subframes in the transmission frame apply the null pilot pattern. However, even in this case, considering the situation where a single scattered pilot pattern identification field (L1B_first_sub_scattered_pilot_pattern or L1D_scattered_pilot_pattern) is shared by the SISO receiver and the MIMO receiver, it is desirable to prohibit the use of the null pilot pattern and use only the Walsh-Hadamard pilot pattern. In this case, the Walsh-Hadamard pilot pattern may be applied to the enhanced layer of the broadcast signal transmission device of FIGS. 13 and 14 regardless of the value signaled in L1B_mimo_scattered_pilot_encoding.

[0367] Ultimately, when transmitting a broadcast signal combining SISO and MIMO by combining LDM and MIMO technologies, only Walsh-Hadamard encoding among null-pilot encoding and Walsh-Hadamard encoding can be allowed as pilot encoding.

[0368] At this time, the 1-bit signaling field L1B_mimo_scattered_pilot_encoding can be set to 0, which can indicate both a MIMO pilot pattern with Walsh-Hadamard encoding and the SISO pilot pattern simultaneously.

[0369] The core layer and the enhanced layer can share pilots not only when MIMO is applied to both the core layer and the enhanced layer, but also when SISO is applied to the core layer and MIMO is applied only to the enhanced layer.

[0370] FIG. 18 is a diagram showing an example of a transmission signal configuration when a SISO signal is transmitted through only one of two MIMO antennas.

[0371] Referring to FIG. 18, it can be seen that in the first polarization (V-POL), the core layer signal and the enhanced layer signal are transmitted together, and in the second polarization (H-POL), only the enhanced layer signal is transmitted.

[0372] The example illustrated in Fig. 18 is an example in which the Walsh-Hadamard pilot pattern is applied, and it can be seen that the distributed pilot pattern is applied equally to the core layer and the enhanced layer in the first polarization (V-POL). In the example illustrated in Fig. 18, the phases of the pilots of some cell positions in the second polarization (H-POL) are opposite to those of the pilots in the first polarization.

[0373] FIG. 19 is a diagram showing an example of a transmission signal configuration when a SISO signal is transmitted through both MIMO antennas.

[0374] Referring to FIG. 19, it can be seen that the core layer signal and the enhanced layer signal are transmitted together in the first polarization (V-POL) and the second polarization (H-POL).

[0375] The example illustrated in Fig. 19 is an example in which the Walsh-Hadamard pilot pattern is applied. It can be seen that the distributed pilot pattern is applied equally to the core layer and the enhanced layer in the first polarization (V-POL) and the second polarization (H-POL). In the example illustrated in Fig. 19, the phases of the pilots of some cell positions in the second polarization (H-POL) are opposite to those of the pilots in the first polarization.

[0376] Figure 20 is a diagram comparing a SISO distributed pilot pattern and a MIMO distributed pilot pattern.

[0377] Referring to Fig. 20, it can be seen that in the first polarization (V-POL), the Walsh-Hadamard encoded MP3_2 MIMO distributed pilot pattern is completely identical to the SISO SP3_2 distributed pilot pattern. In the second polarization (H-POL), the phases of the pilots at the pilot positions corresponding to the second group are inverted.

[0378] Fig. 21 is a block diagram showing an example of a broadcast signal transmission device using multiple transmission antennas and hierarchical division multiplexing.

[0379] Referring to FIG. 21, a broadcast signal transmission device using multiple transmission antennas and layered division multiplexing according to one embodiment of the present invention includes a core layer MIMO signal generation unit (2110), an enhanced layer MIMO signal generation unit (2120), an LDM combining unit (2130), an L1 signaling generation unit (2140), and a transmission signal generation unit (2150).

[0380] The core layer MIMO signal generation unit (2110) generates core layer MIMO signals.

[0381] At this time, the core layer MIMO signal generation unit (2110) may include a core layer FEC (Forward Error Correction) encoder (2111), a core layer bit-interleaver (2112), a core layer MIMO demux (DEMUX; Demultiplexer) (2113), core layer symbol mappers (2114, 2115), and a core layer MIMO precoder (2116).

[0382] The core layer FEC encoder (2111) can apply channel coding to baseband packets corresponding to the core layer to generate FEC frames (FEC packets), which are groups of bits. At this time, the channel coding may be a single-structure method or a method composed of multiple stages, such as inner and outer coding.

[0383] The core layer bit interleaver (2112) can perform bit interleaving on FEC frames output from the core layer FEC encoder (2111).

[0384] The core layer MIMO demux (2113) and core layer symbol mappers (2114, 2115) can generate data cells for transmitting output to each of the multiple antennas for the output bit stream of the core layer bit-interleaver (2112). That is, the core layer MIMO demux (2113) can group the input bit stream according to the modulation order and the number of multiple antennas in order to convert it into data cells. At this time, the core layer MIMO demux (2113) can map even index bits in the FEC-encoded bit stream that has undergone bit interleaving to the first antenna (polarization) and odd index bits to the second antenna (polarization). At this time, the bit stream corresponding to each group can be different depending on the modulation order and the number of multiple antennas. The core layer symbol mappers (2114, 2115) map the output of the core layer MIMO demux (2113) to constellations corresponding to groups of bits corresponding to each antenna (polarization) output, and generate data cells corresponding to each antenna output. In one embodiment, even-numbered bits in a bit group may be mapped to data cells for a first antenna (ANTENNA 1), and odd-numbered bits may be mapped to data cells for a second antenna (ANTENNA 2). At this time, the grouping of each bit or the constellation mapping of the bits using the same in the core layer symbol mappers (2114, 2115) may be performed using various methods not illustrated.

[0385] Groups of two different data cells are input to a core layer MIMO precoder (2116). At this time, the core layer MIMO precoder (2116) can perform signal processing for spatial multiplexing and can adjust the first antenna (polarization) signal and the second antenna (polarization) signal in units of OFDM cells (constellation symbols).

[0386] At this time, the core layer MIMO precoder (2116) may include a streaming combiner, an IQ polarization interleaving unit, and a phase hopping unit. At this time, the stream combiner may combine two data cells inputted and output them. At this time, the IQ polarization interleaving unit may exchange the quadrature components of the two data cells inputted and output them. At this time, the phase hopping unit may change the phase of the data cells inputted and output them. At this time, all three sub-blocks may be activated and operated, all may be deactivated and operated, or only some of the blocks may be activated and operated. In addition, each sub-block may output a different signal or the same signal depending on the channel coding rate and modulation order applied to the data cells inputted to each sub-block. The core layer MIMO precoder (2116) illustrated in FIG. 21 can output two data cells to be output through the first antenna (ANTENNA 1) and the second antenna (ANTENNA 2). That is, two output signals are generated from the core layer MIMO signal generation unit (2110), one of which is a signal for transmission using the first antenna (ANTENNA 1), and the other is a signal for transmission using the second antenna (ANTENNA).

[0387] The first antenna (ANTENNA 1) and the second antenna (ANTENNA 2) may correspond to a first polarization and a second polarization, respectively. That is, the first antenna (ANTENNA 1) may correspond to a first polarization, and the second antenna (ANTENNA 2) may correspond to a second polarization. For example, the first polarization may be vertical polarization, and the second polarization may be horizontal polarization.

[0388] Here, polarization can be the orientation of the electric field vector of a radiated electromagnetic wave with respect to the horizon as seen from the antenna. In other words, polarization can describe the orientation of the wave emitted from. This orientation can be planar or circular.

[0389] Hereinafter, the first antenna may be replaced with the first polarization and the second antenna may be replaced with the second polarization.

[0390] The enhanced layer MIMO signal generation unit (2120) generates enhanced layer MIMO signals.

[0391] At this time, the enhanced layer MIMO signal generation unit (2120) may include an enhanced layer FEC (Forward Error Correction) encoder (2121), an enhanced layer bit-interleaver (2122), an enhanced layer MIMO demux (DEMUX; Demultiplexer) (2123), enhanced layer symbol mappers (2124, 2125), and an enhanced layer MIMO precoder (2126).

[0392] The enhanced layer FEC encoder (2121) can apply channel coding to baseband packets corresponding to the enhanced layer to generate FEC frames (FEC packets), which are groups of bits. At this time, the channel coding may be a single-structure method or a method composed of multiple stages, such as inner and outer coding.

[0393] The enhanced layer bit-interleaver (2122) can perform bit interleaving on FEC frames output from the enhanced layer FEC encoder (2121).

[0394] The enhanced layer MIMO demux (2123) and the enhanced layer symbol mappers (2124, 2125) can generate data cells for transmitting output to each of the multiple antennas for the output bit stream of the enhanced layer bit-interleaver (2122). That is, the enhanced layer MIMO demux (2123) can group the input bit stream according to the modulation order and the number of multiple antennas in order to convert it into data cells. At this time, the enhanced layer MIMO demux (2123) can map even index bits in the FEC-encoded bit stream that has undergone bit interleaving to the first antenna (polarization) and odd index bits to the second antenna (polarization). At this time, the bit stream corresponding to each group can be different depending on the modulation order and the number of multiple antennas. Enhanced layer symbol mappers (2124, 2125) map the output of the enhanced layer MIMO demux (2123) to constellations corresponding to groups of bits corresponding to each antenna (polarization) output, and generate data cells corresponding to each antenna output. In one embodiment, even-numbered bits in a bit group may be mapped to data cells for a first antenna (ANTENNA 1), and odd-numbered bits may be mapped to data cells for a second antenna (ANTENNA 2). At this time, the grouping of each bit or the constellation mapping of the bits using the same in the enhanced layer symbol mappers (2124, 2125) may be performed using various methods not illustrated.

[0395] Groups of two different data cells are input to an enhanced layer MIMO precoder (2126). At this time, the enhanced layer MIMO precoder (2126) can perform signal processing for spatial multiplexing and can adjust the first antenna (polarization) signal and the second antenna (polarization) signal in units of OFDM cells (constellation symbols).

[0396] At this time, the enhanced layer MIMO precoder (2126) may include a streaming combiner, an IQ polarization interleaving unit, and a phase hopping unit. At this time, the stream combiner may combine two data cells inputted and output them. At this time, the IQ polarization interleaving unit may exchange the quadrature components of the two data cells inputted and output them. At this time, the phase hopping unit may change the phase of the data cells inputted and output them. At this time, all three sub-blocks may be activated and operated, all may be deactivated and operated, or only some of the blocks may be activated and operated. In addition, each sub-block may output a different signal or the same signal depending on the channel coding rate and modulation order applied to the data cells inputted to each sub-block. The enhanced layer MIMO precoder (2126) illustrated in FIG. 21 can output two data cells to be output through the first antenna (ANTENNA 1) and the second antenna (ANTENNA 2). That is, two output signals are generated from the enhanced layer MIMO signal generation unit (2120), one of which is a signal for transmission using the first antenna (ANTENNA 1), and the other is a signal for transmission using the second antenna (ANTENNA).

[0397] At this time, the core layer MIMO signals may be generated based on core layer MIMO precoding, and the enhanced layer MIMO signals may be generated based on enhanced layer MIMO precoding.

[0398] At this time, the core layer MIMO precoding and the enhanced layer MIMO precoding may be performed using at least one of stream combining, IQ polarization interleaving, and phase hopping, respectively.

[0399] At this time, if the IQ polarization interleaving corresponding to the core layer is activated, the IQ polarization interleaving corresponding to the enhanced layer can be activated.

[0400] At this time, if phase hopping corresponding to the core layer is activated, phase hopping corresponding to the enhanced layer can be activated.

[0401] At this time, the stream combining, the IQ polarization interleaving and the phase hopping may correspond to the first MIMO field, the second MIMO field and the third MIMO field, respectively.

[0402] At this time, the second MIMO field corresponding to the core layer and the second MIMO field corresponding to the enhanced layer may be set identically, and the third MIMO field corresponding to the core layer and the third MIMO field corresponding to the enhanced layer may be set identically.

[0403] The LDM combiner (2130) performs layered division multiplexing on the core layer MIMO signals and the enhanced layer MIMO signals to generate a first superposition signal (first polarization signal) corresponding to the first polarization and a second superposition signal (second polarization signal) corresponding to the second polarization.

[0404] At this time, the LDM coupling unit (2130) may include injection level controllers (2131, 2132), couplers (2133, 2134) and power normalizers (2135, 2136).

[0405] That is, through the LDM coupling unit, the transmission power of the enhanced layer MIMO signals for the first antenna (ANTENNA 1) and the second antenna (ANTENNA 2) is adjusted by the injection level controllers (2131, 2132) according to a predetermined power injection level (IL). At this time, the power of the enhanced layer MIMO signal for the first antenna (ANTENNA 1) is adjusted through the injection level controller (2131), and the power of the enhanced layer MIMO signal for the second antenna (ANTENNA 2) is adjusted through the injection level controller (2132).

[0406] Therefore, two injection levels are used in the LDM coupling unit (2130) illustrated in FIG. 21.

[0407] At this time, the injection levels can each represent a power ratio of the enhanced layer to the core layer, and information for signaling the injection level can be included in the L1 signaling fields.

[0408] The enhanced layer MIMO signal for the first antenna (ANTENNA 1) with adjusted power is added to the core layer MIMO signal for the first antenna (ANTENNA 1) by a combiner (2133), and the enhanced layer MIMO signal for the second antenna (ANTENNA 2) with adjusted power is added to the core layer MIMO signal for the second antenna (ANTENNA 2) by a combiner (2134).

[0409] The signal added through the coupler (2133) goes through transmission power normalization by the power normalizer (2135) and is output as a first superposition signal (first polarization signal), and the signal added through the coupler (2134) goes through transmission power normalization by the power normalizer (2136) and is output as a second superposition signal (second polarization signal).

[0410] The transmission signal generation unit (2150) generates a first polarization transmission signal including a first preamble corresponding to the first polarization and a second polarization transmission signal including a second preamble corresponding to the second polarization.

[0411] At this time, the transmission signal generation unit (2150) includes framing & interleaving units (2151, 2152) and waveform generators (2153, 2154).

[0412] Time interleaving, frame generation (including a preamble), and frequency interleaving can be performed in the framing & interleaving unit (2151) on the first superposition signal output through the power normalizer (2135). The output of the framing & interleaving unit (2151) is input to the waveform generator (2153) and output to the first antenna as the first polarization transmission signal.

[0413] Time interleaving, frame generation (including preamble), and frequency interleaving can be performed in the framing & interleaving unit (2152) on the second superposition signal output through the power normalizer (2136). The output of the framing & interleaving unit (2152) is input to the waveform generator (2154) and output to the second antenna as a second polarization transmission signal.

[0414] The framing & interleaving units (2151, 2152) illustrated in FIG. 21 can each generate a signal corresponding to a frame to be transmitted via an antenna using data cells input as input. At this time, the framing & interleaving units (2151, 2152) may or may not activate and perform time interleaving for each input data cell. At this time, the framing & interleaving units (2151, 2152) may perform framing for each data cell, configuring a preamble symbol and a subframe. At this time, the preamble symbol may not include a data cell. At this time, frequency interleaving may or may not be activated and applied.

[0415] The grouped data cells, which are the outputs of the framing & interleaving units (2151, 2152), are input to the waveform generators (2153, 2154). At this time, the waveform generators (2153, 2154) can each perform an inverse fast Fourier transform (IFFT) after pilot insertion and insert a guard interval symbol. In addition, the waveform generators (2153, 2154) can each generate a bootstrap symbol and output it by positioning it at the very beginning of the transmission frame. At this time, each of the waveform generators (2153, 2154) can activate and apply the MISO (Multiple-Input Single-Output) signal processing function or can deactivate and not apply it.

[0416] The L1 signaling generation unit (2140) can generate injection level signaling information regarding two injection levels corresponding to the enhanced layer MIMO signals.

[0417] That is, the injection level information (IL INFO) for the enhanced layer MIMO signal for the first antenna (or polarization) and the injection level information (IL INFO) for the enhanced layer MIMO signal for the second antenna (or polarization) are used by the injection level controllers (2131, 2132) and are also transmitted to and used by the power normalizers (2135, 2136). At this time, the power normalizers (2135, 2136) each multiply the size of the combined signal by a normalizing factor calculated from the injection level information to adjust the power of the input signal to an appropriate level.

[0418] At this time, the injection level information (IL INFO) for the enhanced layer MIMO signal for the first antenna (or polarization) and the injection level information (IL INFO) for the enhanced layer MIMO signal for the second antenna (or polarization) are transmitted to the L1 signaling generation unit (2140), thereby generating L1 signaling information to be included in the preamble and transmitted. That is, the injection level signaling information included in the L1 signaling information is modulated and transmitted by being included in the preamble by the framing & interleaving units (2135, 2136).

[0419] At this time, since there are two injection level controllers (2131, 2132), there are two injection levels used, and there are also two preambles generated from the framing & interleaving units (2151, 2152).

[0420] The injection levels of the injection level controllers (2131, 2132) may be set to the same injection level or may be set to different injection levels.

[0421] The first preamble generated by the framing & interleaving unit (2151) and the second preamble generated by the framing & interleaving unit (2152) may each include only the first injection level information (when the injection levels of the injection level controllers (2131, 2132) are the same) or may include both the first injection level information and the second injection level information (when the injection levels of the injection level controllers (2131, 2132) are different). In this case, the first injection level signaling information included in the first preamble and the first injection level signaling information included in the second preamble may be the same. Similarly, the second injection level signaling information included in the first preamble and the second injection level signaling information included in the second preamble may be the same. Furthermore, the entire L1 signaling information included in the first preamble may be identical to the entire L1 signaling information included in the second preamble. That is, the first preamble transmitted for the first polarization and the second preamble transmitted for the second polarization may be configured with the same modulation signals and set identically, and their transmission powers may be identical or different.

[0422] At this time, the first preamble and the second preamble may include the same 5-bit injection level signaling information corresponding to the injection levels.

[0423] The enhanced layer MIMO signal for the first antenna / polarization and the enhanced layer MIMO signal for the second antenna / polarization may be power-regulated corresponding to the same injection level or may be power-regulated corresponding to different injection levels.

[0424] At this time, the first preamble corresponding to the first antenna (polarization) and the second preamble corresponding to the second antenna (polarization) may include the same 5-bit injection level field (L1D_plp_ldm_injection_level).

[0425] At this time, the injection level controllers (2131, 2132) and power normalizers (2135, 2136) illustrated in FIG. 21 can all operate based on an injection level corresponding to the same 5-bit injection level field (L1D_plp_ldm_injection_level). That is, the same injection level value can be shared for the first antenna (polarization) and the second antenna (polarization).

[0426] Depending on the embodiment, different injection levels may be used for the first antenna / polarization and the second antenna / polarization. In this case, if the L1-Detail signaling for the first antenna / polarization and the L1-Detail signaling for the second antenna / polarization are the same, a signaling field separate from the aforementioned 5-bit injection level field (L1D_plp_ldm_injection_level) may be required. In this case, an injection level corresponding to L1D_plp_ldm_injection_level may be used for the first antenna (polarization), and an injection level corresponding to another signaling field may be used for the second antenna (polarization).

[0427] The LDM coupling unit (2130) illustrated in FIG. 21 and the LDM coupling unit (1330) illustrated in FIG. 13 can output a first polarization signal corresponding to the first polarization and a second polarization signal corresponding to the second polarization.

[0428] The transmission signal generation unit (2150) illustrated in Fig. 21 and the transmission signal generation unit (1340) illustrated in Fig. 13 are the scaling factor (K) of the first polarization. m[0]) to generate a first polarization transmission signal corresponding to the first polarization signal, and a scaling factor (K) of the second polarization m [1]) can be used to generate a second polarization transmission signal corresponding to the second polarization signal.

[0429] At this time, the scaling factor of the first polarization and the scaling factor of the second polarization may correspond to the injection level of the hierarchical division multiplexing.

[0430] At this time, the scaling factor (K) of the first polarization m [0]) corresponds to the polarization index 0, and the scaling factor (K) of the second polarization m [1]) may correspond to polarization index 1.

[0431] At this time, the scaling factor of the first polarization and the scaling factor of the second polarization may be applied to values ​​corresponding to complex modulation values ​​that are not set for each polarization for the preamble, and may be applied to values ​​corresponding to complex modulation values ​​that are set for each polarization for at least one subframe.

[0432] At this time, for the first polarization, the power of the preamble symbol corresponding to the preamble may reference the data symbol power of the first subframe that activates the first polarization.

[0433] At this time, for the second polarization, the power of the preamble symbol corresponding to the preamble may refer to the data symbol power of the first subframe that activates the second polarization.

[0434] At this time, the scaling factor of the first polarization and the scaling factor of the second polarization can be applied to power scaling performed in the IFFT (Inverse Fast Fourier Transform) stage.

[0435] At this time, the LDM coupling unit can hierarchically multiplex one of the core layer signal and the enhanced layer MIMO signals and output it as the first polarization signal, and output the other one of the enhanced layer MIMO signals as the second polarization signal.

[0436] At this time, the scaling factor of the first polarization can be maintained the same even if the injection level corresponding to the hierarchical division multiplexing changes.

[0437] At this time, the scaling factor of the second polarization may change as the injection level corresponding to the hierarchical division multiplexing changes.

[0438] At this time, the scaling factor of the second polarization may decrease as the injection level corresponding to the hierarchical division multiplexing increases.

[0439] FIG. 22 is a diagram showing a physical layer frame of a broadcast signal according to an embodiment of the present invention.

[0440] Referring to FIG. 22, it can be seen that the physical layer frame of a broadcast signal according to one embodiment of the present invention has a structure in which a bootstrap, a preamble, and a data subframe are connected in time series.

[0441] In particular, data within the physical layer frame illustrated in FIG. 22 can be transmitted using multiple data subframes.

[0442] A broadcast signal transmitter for MIMO transmission has a MIMO exciter that outputs two polarization transmission signals (a first polarization transmission signal and a second polarization transmission signal), and each polarization transmission signal can be output through a power amplifier. That is, the two polarization transmission signals can be output through two power amplifiers.

[0443] The polarization transmission signals, which are outputs of the MIMO exciter corresponding to each of the two MIMO transmit antennas (polarizations), may correspond to bootstrap and preamble signals of the same configuration, and the output powers of the polarization transmission signals may be different. Furthermore, the transmission powers of the two power amplifiers through which each of the polarization transmission signals passes may also be set differently.

[0444] At this time, setting the transmission power of the second polarization (second antenna) to a small value may be helpful in ensuring successful decoding of the core layer data (legacy service) of the first polarization (first antenna).

[0445] At this time, the data subframes of the first polarization transmission signal and the second polarization transmission signal may be composed of signals of different types. That is, the data transmitted through the first polarization and the data transmitted through the second polarization may be different from each other.

[0446] At this time, the first polarization may correspond to a typical layered division multiplexing (LDM) configuration having both a core layer and an enhanced layer, while the second polarization may have a unique configuration having only an enhanced layer without a core layer.

[0447] To support such a unique structure, appropriate power scaling for each polarization may be required in the IFFT block within the waveform generator.

[0448] FIG. 23 is a diagram illustrating broadcast signal frames transmitted through two MIMO antennas according to one embodiment of the present invention.

[0449] Referring to FIG. 23, it can be seen that the power of the enhanced layer signal (ANT1 SIG.) of the first antenna (TRANSMIT ANTENNA #1, first polarization) and the power of the enhanced layer signal (ANT2 SIG.) of the second antenna (TRANSMIT ANTENNA #2, second polarization) are the same.

[0450] At this time, in the example shown in FIG. 23, the first antenna (TRANSMIT ANTENNA #1, first polarization) and the second antenna (TRANSMIT ANTENNA #2, second polarization) can commonly use the L1D_plp_ldm_injection_level field.

[0451] For convenience of explanation, the bootstrap and preamble are illustrated together in FIG. 23, but as described above, the bootstrap and preamble may be transmitted sequentially.

[0452] As a result, the transmission power of the first polarization transmission signal and the second polarization transmission signal can be set differently.

[0453] At this time, the first polarization transmission signal and the second polarization transmission signal may pass through the first power amplifier and the second power amplifier, respectively. At this time, the first polarization transmission signal and the second polarization transmission signal that have passed through the power amplifiers may be output with different transmission powers through a transmission line physically connected to transmission antenna 1 and a transmission line physically connected to transmission antenna 2, respectively.

[0454] At this time, the ratio between the output power of the first polarization transmission signal and the output power of the second polarization transmission signal can be determined corresponding to the L1D_plp_ldm_injection_level field.

[0455] That is, when setting the transmission power of the first polarization transmission signal and the transmission power of the second polarization transmission signal in the waveform generators, the L1D_plp_ldm_injection_level field can be taken into consideration when setting the transmission power.

[0456] The waveform generators illustrated in FIG. 13 or FIG. 21 may include an IFFT block. In particular, for the IFFT block, the baseband time domain signal after the IFFT may be expressed as in Equation 3 below for each of the first and second polarizations.

[0457] [Equation 3]

[0458]

[0459] That is, the above mathematical expression 3 represents a post-IFFT signal description.

[0460] In the above mathematical expression 3, Ψ l,k (t) can be expressed as in the following mathematical formula 4, and Ψ m,l,k (t) can be expressed as in the following mathematical formula 5. In this case, Ψ l,k (t) and Ψ m,l,k (t) may be the same as the values ​​defined in the existing ATSC 3.0 A / 322 standard.

[0461] [Equation 4]

[0462]

[0463] [Equation 5]

[0464]

[0465] At this time, a can represent a polarization (antenna) index. At this time, a can be set to 0 for the first polarization, and a can be set to 1 for the second polarization.

[0466] At this time, k can represent the carrier number.

[0467] At this time, l can represent an OFDM symbol number starting from 0 for the first preamble symbol of a frame and being reset at the first OFDM symbol of each subframe.

[0468] At this time, m is 0 ≤ m < N SF It can indicate the subframe number.

[0469] At this time, c l,k may be the complex modulation value for carrier k of the preamble symbol number l.

[0470] At this time, c a,m,l,k may be the complex modulation value for carrier k of the OFDM symbol number l in subframe number m associated with polarization a.

[0471] At this time, K m[a] may be a scaling coefficient subject to subframe number m and antenna index a. That is, the scaling coefficient K m [a] may vary depending on the antenna index and may also vary depending on the subframe. In this case, the scaling factor K m [a] can remain the same within one subframe, and thus the injection level can remain the same within one subframe.

[0472] At this time, K m The value of [a] may be related to injection level information as summarized in Table 17 below.

[0473] Antenna-Specific Injection Level of EL below CL [dB]K m[a]Type AType Ba= 0, 1a= 0a= 10.01.00000001.00000000.70710680.51.00000001.00000000.68647611.01.00000001.00000000.66534831.51.00000001.00000000.64381782.01.00000001.00000000.62198322.51.00000001.0000000.59994583.01.00000001.00000000.57780673.51.00000001.00000000.55 566524.01.00000001.00000000.5336174.51.00000001.00000000.51175285.01.00000001.00000000.49015616.01.00000001.00000000.44806257.01.00000001.0000000.40784508.01.00000001.00000000.36987429.01.00000001.00000000.334388710.01.000000001.00000000 .301511411.01.00000001.00000000.271270312.01.00000001.00000000.243620413.01.00000001.00000000.218464414.01.00000001.00000000.195669315.01.00000001.00000000.175081216.01.00000001.0000000.156535517.01.00000001.00000000.139865318.01.00000 001.00000000.124906619.01.00000001.00000000.111502120.01.00000001.00000000.099503721.01.00000001.00000000.088773222.01.00000001.00000000.079183423.01.00000001.0000000.070617924.01.00000001.0000000.062970525.01.00000001.0000000.0561454

[0474] That is, Table 17 shows the scaling factor according to the injection level of the injection layer when LDM and MIMO are used together.

[0475] At this time, in the above Table 17, Type A corresponds to the transmitter structure illustrated in Fig. 21, and Type B corresponds to the transmitter structure illustrated in Figs. 13 and 14.

[0476] At this time, the IFFT output of the above mathematical expression 3 may correspond to the case where all frames use the combined technology of LDM and MIMO. If the subframe corresponding to the combination of LDM and MIMO is time-division multiplexed with a subframe to which LDM and MIMO are not applied together, the IFFT processing may need to be expressed differently.

[0477] At this time, NoC P,l is (l + 1) th The number of carriers in the preamble symbol (l + 1) th preamble symbol). The first preamble symbol (l=0) always has the minimum NoC, and the subsequent preamble symbols (0 <l< L Fp ) can share the same NoC value that is signaled in L1-Basic.

[0478] At this time, NoC m can represent the number of carriers of subframe m.

[0479] At this time, L SFm can represent the number of data and subframe boundary symbols in subframe m.

[0480] At this time, L Fp can represent the number of OFDM symbols in the preamble.

[0481] At this time, N SF can indicate the number of subframes in a frame.

[0482] At this time, P'preamble,a,l is (l + 1) derived from the input (before scaling by K0[a]) of the IFFT block associated with polarization a. th The frequency domain total power of the (l + 1) preamble symbol th A preamble symbol, derived from the input to the IFFT block (before scaling by K0[a]) associated with polarization a) can be represented. In this case, P'preamble,a,l is P defined in the existing ATSC 3.0 A / 322 standard. preamble,l can share the same value as (l + 1) for polarization a. th The power of the preamble symbol is scaled by K0[a] (K0[a]) 2 It can be adjusted to P'preamble,a,l.

[0483] At this time, P' data,a,mcan represent the frequency domain total power of each data and subframe boundary symbol in subframe m, derived from the input to the IFFT block associated with polarization a. In this case, P' data,a,m is defined in the existing ATSC 3.0 A / 322 standard. data,m can share the same value. With respect to the data and subframe boundary symbols transmitted from polarization a, the power of subframe m is scaled by K0[a] (K m [a]) 2 P' data,a,m can be adjusted to

[0484] At this time, k' can represent the carrier index relative to the center frequency. That is, k' can be k - (NoC - 1) / 2.

[0485] At this time, T sm can represent the total symbol duration of each data and subframe boundary symbol in subframe m. In this case, T Sm = T Um + T Gm It could be.

[0486] At this time, T Umcan represent the useful symbol duration for each data and subframe boundary symbol in subframe m.

[0487] At this time, T Gm may represent the duration of the guard interval for each data and subframe boundary symbol in subframe m including extra samples for each data and subframe boundary symbol.

[0488] At this time, T BS can represent the duration of the bootstrap.

[0489] At this time, T P can represent the total duration of the preamble. In this case, T P = L Fp T Sp It could be.

[0490] At this time, T Sp can represent the total symbol duration of each preamble symbol. At this time, T Sp = T Up + T Gp It could be.

[0491] At this time, T Upcan represent the useful symbol duration for each preamble symbol.

[0492] At this time, T Gp can represent the duration of the guard interval for each preamble symbol.

[0493] At this time, T SFm can represent the total duration of all data and subframe boundary symbols in subframe m.

[0494] At this time, ∑T SFm can represent the summation of the total duration of subframes from 0 to m-1.

[0495] The generation of the baseband time domain signal can be performed serially for each polarization stream. Each polarization stream can transmit different complex modulation values ​​at the same cell position. Therefore, the antenna-specific notation c a,m,l,k This can be used.

[0496] Complex modulation values ​​c obtained from previous function blocks l,k and c a,m,l,k Given this, the IFFT blocks have scalar coefficients K m Power scaling can be performed based on [a].

[0497] Allowed K m Correlation between the values ​​of [a] and the injection level (allowed values ​​of K m[a] and the correspondence to the injection level) are expressed in Table 17 above. In particular, all K except the second polarization (a = 1) of Type B in Table 17 m [a] can be given as 1 (unity).

[0498] At this time, IFFT power normalization is performed for polarization a and subframe m by normalizing the average power of the baseband time domain signal (K m [a]) 2 can be normalized. At this time, for the preamble, the average power is (K0[a]) 2 This power normalization applies an IFFT power normalization factor 1 / √P'preamble,a,l to the preamble and an IFFT power normalization factor 1 / √P' to the data and subframe boundary symbols. data,a,m This can be achieved by applying .

[0499] Frequency domain power parameters P'preamble, a, l and P' data,a,m is K m Carrier signals that are not scaled by [a] (e.g., c l,k and c a,m,l,k ) can be derived from.

[0500] Parameters not explicitly defined here may be used identically to those defined in the existing ATSC 3.0 A / 322 standard.

[0501] Figure 24 is a block diagram showing an example of a broadcast signal transmission device in which channel bonding and hierarchical division multiplexing are used together.

[0502] Referring to FIG. 24, a broadcast signal transmission device in which channel bonding and hierarchical division multiplexing are used together includes an input formatting unit (2410), a stream distributor (2420), a first RF BICM unit (2430), a second RF BICM unit (2437), a cell switching unit (2440), a hierarchical division modulation unit (2451, 2452), and a transmission signal generation unit (2460).

[0503] The input formatting unit (2410) and the stream distributor (2420) have already been described above, so further description is omitted.

[0504] At this time, hierarchical division multiplexing multiplexes different physical layer pipes corresponding to the core layer and the enhanced layer into a single transmission resource, and the input formatting unit (2410) may exist in two or more cases corresponding to the core layer physical layer pipe and the enhanced layer physical layer pipe.

[0505] The number of stream distributors (2420) may vary depending on the number of physical layer pipes to which channel bonding is applied.

[0506] If the input formatting unit for the core layer and the input formatting unit for the enhanced layer are provided separately, the stream distributors for the core layer and the enhanced layer may be provided separately.

[0507] That is, the output of the input formatting unit for the core layer may be provided to the stream distributor for the core layer, and the outputs of the stream distributor for the core layer may be provided to the core layer BICM units (2431, 2433). At this time, the output of the input formatting unit for the enhanced layer may be provided to the stream distributor for the enhanced layer, and the outputs of the stream distributor for the enhanced layer may be provided to the enhanced layer BICM units (2432, 2434). In some embodiments, when the core layer and the enhanced layer are channel bonded, a stream distributor may exist for both the core layer and the enhanced layer, and the output of this stream distributor may be provided to the core layer BICM unit (2431 or 2433) and the enhanced layer BICM unit (2432 or 2434).

[0508] The first RF BICM unit (2430) generates at least one first RF core layer BICM signal and at least one first RF enhanced layer BICM signal. At this time, the first RF BICM unit (2430) may include a core layer BICM unit (2431) and an enhanced layer BICM unit (2432). At this time, the core layer BICM unit (2431) and the enhanced layer BICM unit (2432) may have the same structure, and may be the same as the SISO signal generation unit illustrated in FIG. 8 or the core layer BICM unit illustrated in FIG. 13, respectively. In the example illustrated in FIG. 24, at least one first RF core layer BICM signal is a first RF core layer SISO BICM signal corresponding to SISO, and at least one first RF enhanced layer BICM signal is a first RF enhanced layer SISO BICM signal corresponding to SISO.

[0509] The second RF BICM unit (2437) generates at least one second RF core layer BICM signal. At this time, the second RF BICM unit (2437) may include a core layer BICM unit (2433) and an enhanced layer BICM unit (2434). At this time, the core layer BICM unit (2433) and the enhanced layer BICM unit (2434) may have the same structure, and may be the same as the SISO signal generating unit illustrated in FIG. 8 or the core layer BICM unit illustrated in FIG. 13, respectively. In the example illustrated in FIG. 24, at least one second RF core layer BICM signal is a second RF core layer SISO BICM signal corresponding to SISO, and at least one second RF enhanced layer BICM signal is a second RF enhanced layer SISO BICM signal corresponding to SISO. In the example illustrated in FIG. 24, the enhanced layer BICM unit (2434) indicated by a dotted line may or may not be provided. If the enhanced layer BICM unit (2434) is not provided, the second RF BICM unit (2437) generates only the second RF core layer SISO BICM signal, and if the enhanced layer BICM unit (2434) is provided, the second RF BICM unit (2437) can generate the second RF core layer SISO BICM signal and the second RF enhanced layer SISO BICM signal.

[0510] As described above, the cell exchange unit (2440) can be activated only when the channel bonding method is the SNR averaging channel bonding method.

[0511] When activated, the cell exchange unit (2440) performs cell exchange between some of the cells corresponding to the first RF channel and some of the cells corresponding to the second RF channel among the first RF channel and the second RF channel that are channel bonded.

[0512] At this time, the cell exchange unit (2440) may operate to exchange cells in the same layer or may operate to exchange cells between different layers.

[0513] The cell exchange unit (2440) may correspond to the cell exchanger illustrated in FIG. 1, FIG. 5, FIG. 8, FIG. 10, FIG. 11, and FIG. 12.

[0514] The cell exchange unit (2440) may include a core layer cell exchanger that performs cell exchange between outputs of core layer BICM units (2431, 2433) and an enhanced layer cell exchanger that performs cell exchange between outputs of enhanced layer BICM units (2432, 2434).

[0515] The hierarchical division modulation unit (2451, 2452) performs hierarchical division multiplexing corresponding to at least a portion of the at least one first RF core layer BICM signal and at least a portion of the at least one first RF enhanced layer BICM signal to generate at least one hierarchical division multiplexed signal. At this time, the hierarchical division modulator (2451) included in the hierarchical division modulation unit performs hierarchical division multiplexing corresponding to at least a portion of the first RF core layer SISO BICM signal and at least a portion of the first RF enhanced layer SISO BICM signal to generate a first RF hierarchical division multiplexed signal, and can output the first RF hierarchical division multiplexed signal to the framing & interleaving unit (2461) included in the transmission signal generation unit (2460). At this time, the hierarchical division modulator (2452) included in the hierarchical division modulation unit can perform hierarchical division multiplexing corresponding to at least a portion of the second RF core layer SISO BICM signal and at least a portion of the second RF enhanced layer SISO BICM signal to generate a second RF hierarchical division multiplexed signal and output it to the framing & interleaving unit (2463) included in the transmission signal generation unit (2460).

[0516] As described above, if the enhanced layer BICM unit (2434) is not provided, the layered division modulator (2452) may not be provided or may be disabled.

[0517] That is, in the case of a broadcast signal that applies both channel bonding and hierarchical division multiplexing, hierarchical division multiplexing may be applied to only one RF channel, or hierarchical division multiplexing may be applied to both RF channels that are channel bonded.

[0518] At least one of the channel-bonded RF channels may be configured with a plurality of physical layer pipes multiplexed within the RF channel by frequency division multiplexing (FDM), layered division multiplexing (LDM), time division multiplexing (TDM), or a combination thereof. In this case, the channel-bonded physical layer pipe(s) may be multiplexed with other physical layer pipes that do not use channel bonding. LDM combines two cells belonging to different physical layer pipes in the same RF channel, and the combined cells are processed and mapped as a single cell within a subframe during the framing process. In addition, channel bonding combines two physical layer pipes belonging to different RF channels (these two combinations may be referred to as a single channel-bonded physical layer pipe), and is applied independently to each physical layer pipe, so that LDM combining can be performed after cell swapping. At this time, whether to use channel bonding for the core layer physical layer pipe and whether to use channel bonding for the enhanced layer physical layer pipe can be independently determined.

[0519] In FIG. 24, the cell exchange unit (2440) is a block specialized for SNR averaging, and the blocks indicated by dotted lines of the input formatting unit (2410), stream distributor (2420), enhanced layer BICM unit (2434), and layer division modulator (2452) may be blocks activated by the inclusion of layer division multiplexed physical layer pipe(s) in the channel bonding process.

[0520] When plain channel bonding is used, two physical layer pipes of different RF channels can be bonded with different scheduling parameters. The scheduling parameters can include layer settings, multiplexing schemes, and framing information (PLP size, PLP start, PLP type, etc.).

[0521] When SNR averaging channel bonding is used, two mutually bonded physical layer pipes may need to be set to the same scheduling parameters in order to achieve low complexity. The scheduling parameters may include layer indices of the physical layer pipes. This may mean that a core layer physical layer pipe can only be channel bonded with a core layer physical layer pipe, and an enhanced layer physical layer pipe can only be channel bonded with an enhanced layer physical layer pipe.

[0522] At this time, in the case of a broadcast signal that applies both channel bonding and hierarchical division multiplexing, channel bonding may be applied to some physical layer pipe(s) of the two channel-bonded RF channels, or channel bonding may be applied to all physical layer pipe(s).

[0523] At this time, in the case of a broadcast signal to which both channel bonding and hierarchical division multiplexing are applied, channel bonding can be applied regardless of the layer to which the physical layer pipe(s) of the two RF channels to be channel-coupled are transmitted. That is, the core layer physical layer pipes of the two RF channels may be channel bonded together, the enhanced layer physical layer pipes of the two RF channels may be channel bonded together, or the core layer physical layer pipe of one RF channel and the enhanced layer physical layer pipe of another RF channel may be channel bonded.

[0524] At this time, in the case of a broadcast signal that applies both channel bonding and hierarchical division multiplexing, the two layers (core layer and enhanced layer) can independently set whether to apply channel bonding, and channel bonding can also be applied to all physical layer pipes transmitted through the two layers.

[0525] At this time, channel bonding can be independently set to apply to each physical layer pipe of each RF channel.

[0526] The framing & interleaving units (2461, 3463) and waveform generators (2462, 2464) included in the transmission signal generation unit (2460) have already been sufficiently explained.

[0527] When a broadcast system that applies both channel bonding and hierarchical division multiplexing operates in SNR averaging mode, the injection level of the enhanced layer can be determined so as to maintain the same broadcast coverage for each RF channel and provide the same robustness for each RF channel signal.

[0528] When hierarchical division multiplexing is applied, the injection level of the enhanced layer is independent of the data rate, motion processing delay, or timing. However, when SNR averaging mode is applied, robustness must be maintained to utilize the benefits of channel bonding. However, when plain channel bonding is applied, there is no crossing between the two RF channels, allowing independent signal processing, and thus signal configuration is more flexible than in the case of SNR averaging channel bonding.

[0529] When the broadcast signal transmission device illustrated in FIG. 24 is used, when it is determined whether to apply channel bonding and hierarchical division multiplexing using an SNR averaging method to each physical layer pipe, channel bonding may be applied only to the core layer physical layer pipe, channel bonding may be applied only to the enhanced layer physical layer pipe, or channel bonding may be applied to both the core layer physical layer pipe and the enhanced layer physical layer pipe.

[0530] At this time, in order to increase performance gains by utilizing the frequency diversity characteristics of SNR averaging channel bonding, the channel-bonded RF channels may need to maintain the same broadcast coverage or the same signal robustness.

[0531] Depending on the embodiment, different injection levels may be applied to the enhanced layer physical layer pipes of channel bonded RF channels, or the same injection level may be used to maintain the same broadcast coverage and provide the same robustness.

[0532] That is, when SNR averaging channel bonding is performed, a first injection level corresponding to hierarchical division multiplexing for a first RF channel corresponding to the first RF transmission signal and a second injection level corresponding to hierarchical division multiplexing for a second RF channel corresponding to the second RF transmission signal may be identical to each other.

[0533] The transmission signal generation unit (2460) generates at least one first RF transmission signal corresponding to the first RF channel and at least one second RF transmission signal corresponding to the second RF channel among the channel bonded first RF channel and second RF channel.

[0534] That is, the transmission signal generation unit (2460) generates at least one first RF transmission signal corresponding to the at least one hierarchical division multiplexed signal and at least one second RF transmission signal generated based on at least a portion of the at least one second RF core layer BICM signal.

[0535] At this time, at least one of the at least one first RF transmission signal and the at least one second RF transmission signal may include a preamble signaling a channel bonding mode of at least one channel-bonded physical layer pipe.

[0536] Figure 25 is a block diagram showing an example of a broadcast signal transmission device in which MIMO, channel bonding, and hierarchical division multiplexing are used together.

[0537] Referring to FIG. 25, a broadcast signal transmission device in which MIMO, channel bonding, and hierarchical division multiplexing are used together includes an input formatting unit (2410), a stream distributor (2420), a first RF BICM unit (2530), a second RF BICM unit (2540), MIMO precoding units (2551, 2552, 2553, 2554), a cell switching unit (2560), a hierarchical division modulation unit (2571, 2572), and a transmission signal generation unit (2580).

[0538] At this time, the broadcast signal transmission device illustrated in FIG. 25 can be used when MIMO is applied to RF channel(s), physical layer pipe(s) are multiplexed by LDM, and some or all physical layer pipe(s) of each RF channel are bonded by channel bonding.

[0539] The input formatting unit (2410) and the stream distributor (2420) have already been described in detail through Fig. 24, etc.

[0540] At this time, hierarchical division multiplexing multiplexes different physical layer pipes corresponding to the core layer and the enhanced layer into one transmission resource, and there may be two or more input formatting units (2410) corresponding to the core layer physical layer pipe and the enhanced layer physical layer pipe.

[0541] The number of stream distributors (2420) may vary depending on the number of physical layer pipes to which channel bonding is applied.

[0542] If the input formatting unit for the core layer and the input formatting unit for the enhanced layer are provided separately, the stream distributors for the core layer and the enhanced layer may be provided separately.

[0543] That is, the output of the input formatting unit for the core layer may be provided to the stream distributor for the core layer, and the outputs of the stream distributor for the core layer may be provided to the core layer BICM units (2531, 2541). At this time, the output of the input formatting unit for the enhanced layer may be provided to the stream distributor for the enhanced layer, and the outputs of the stream distributor for the enhanced layer may be provided to the enhanced layer BICM units (2533, 2543). In some embodiments, when the core layer and the enhanced layer are channel bonded, a stream distributor may exist for both the core layer and the enhanced layer, and the output of this stream distributor may be provided to the core layer BICM unit (2531 or 2541) and the enhanced layer BICM unit (2533 or 2543).

[0544] The first RF BICM unit (2530) generates at least one first RF core layer BICM signal and at least one first RF enhanced layer BICM signal. At this time, the first RF BICM unit (2530) may include a core layer BICM unit (2531) and an enhanced layer BICM unit (2533). At this time, the core layer BICM unit (2531) may be the same as the SISO signal generating unit illustrated in FIG. 8 or the core layer BICM unit illustrated in FIG. 13 in accordance with SISO, or may be the same as the first BICM unit, the second BICM unit illustrated in FIG. 1 and FIG. 5 or the enhanced layer BICM unit illustrated in FIG. 13 in accordance with MIMO. At this time, the enhanced layer BICM unit (2533) may be the same as the first BICM unit, the second BICM unit illustrated in FIGS. 1 and 5, or the enhanced layer BICM unit illustrated in FIG. 13.

[0545] In the example illustrated in FIG. 25, at least one first RF core layer BICM signal may be a first RF core layer SISO BICM signal corresponding to SISO, or may be first RF core layer MIMO BICM signals corresponding to MIMO. In this case, at least one first RF enhanced layer BICM signal may be a first RF enhanced layer MIMO BICM signal corresponding to MIMO. Accordingly, a MIMO precoding unit (2552) may be provided corresponding to the enhanced layer BICM unit (2533) corresponding to MIMO.

[0546] The second RF BICM unit (2540) generates at least one second RF core layer BICM signal. At this time, the second RF BICM unit (2540) may include a core layer BICM unit (2541), and the core layer BICM unit (2541) may have the same structure as the core layer BICM unit (2531). At this time, the second RF core layer BICM signal may be a second RF core layer SISO BICM signal corresponding to SISO, or may be second RF core layer MIMO BICM signals corresponding to MIMO.

[0547] In addition, the second RF BICM unit (2540) may further include an enhanced layer BICM unit (2543), and the enhanced layer BICM unit (2543) may have the same structure as the core layer BICM unit (2531) or the core layer BICM unit (2541). At this time, the enhanced layer BICM unit (2543) may generate at least one second RF enhanced layer BICM signal. At this time, the second RF enhanced layer BICM signal may be a second RF enhanced layer SISO BICM signal corresponding to SISO, or may be second RF enhanced layer MIMO BICM signals corresponding to MIMO.

[0548] If the core layer BICM units (2531, 2541) and the enhanced layer BICM unit (2543) correspond to MIMO, MIMO precoding units (2551, 2553, and 2554) may be provided. In this case, the MIMO precoding units (2551, 2552, 2553, and 2554) may be the same as the MIMO precoding units illustrated in FIG. 1, etc.

[0549] That is, when each BICM unit operates as a MIMO MAP, cell(s) corresponding to multiple antennas are output, and MIMO precoding may or may not be performed for the corresponding cell(s).

[0550] When the enhanced layer BICM unit (2543) is not provided, the second RF BICM unit (2540) generates only the second RF core layer SISO BICM signal or the second RF core layer MIMO BICM signals, and when the enhanced layer BICM unit (2543) is provided, the second RF BICM unit (2540) can generate not only the second RF core layer SISO BICM signal or the second RF core layer MIMO BICM signals, but also the second RF enhanced layer SISO BICM signal or the second RF enhanced layer MIMO BICM signals.

[0551] Channel bonding with MIMO is not limited to bonding between MIMO physical layer pipes, and bonding between SISO and MIMO physical layer pipes may also be permitted. When plain channel bonding is used, the channel-bonded physical layer pipes may consist of MIMO physical layer pipes and SISO physical layer pipes, each transmitting on different RF channels. In this case, the BICM chain encoding the relevant SISO physical layer pipe acts as a MAP, and the MIMO physical layer pipes of other RF channels can apply the MIMO MAP.

[0552] When SNR averaging channel bonding is used, MIMO physical layer pipes may be prevented from being channel bonded with SISO physical layers to enable low complexity cell re-switching at the receiver end.

[0553] The cell exchange unit (2560) can be activated only when the channel bonding method is the SNR averaging channel bonding method.

[0554] When activated, the cell exchange unit (2560) performs cell exchange between some of the cells corresponding to the first RF channel and some of the cells corresponding to the second RF channel among the first RF channel and the second RF channel that are channel bonded.

[0555] That is, when the channel bonding method is the SNR averaging channel bonding method, the cell exchange block is activated so that some of the cells corresponding to the channel bonded physical layer pipes of two RF channels can be exchanged with each other.

[0556] At this time, if the channel bonding method is an SNR averaging channel bonding method, channel bonding and MIMO can be applied in the same manner to physical layer pipes belonging to the same layer.

[0557] At this time, channel bonding and MIMO can be performed independently for each physical layer pipe of each RF channel.

[0558] At this time, the cell exchange unit (2560) may operate to exchange cells in the same layer or to exchange cells between different layers.

[0559] The cell exchange unit (2560) may correspond to the cell exchangers illustrated in FIGS. 1, 5, 8, 10, 11, and 12, etc. That is, the cell exchange unit (2560) may include one or more of the cell exchangers illustrated in FIGS. 1, 5, 8, 10, 11, and 12, etc.

[0560] The cell exchange unit (2560) may include a core layer cell exchanger that performs cell exchange between outputs of the core layer BICM units (2531, 2541) and an enhanced layer cell exchanger that performs cell exchange between outputs of the enhanced layer BICM units (2533, 2543). At this time, the core layer cell exchanger may perform cell exchange between the same layer or may perform cell exchange between different layers. Similarly, the enhanced layer cell exchanger may perform cell exchange between the same layer or may perform cell exchange between different layers.

[0561] The hierarchical division modulation unit (2571, 2572) performs hierarchical division multiplexing corresponding to at least a portion of the at least one first RF core layer BICM signal and at least a portion of the at least one first RF enhanced layer BICM signal to generate at least one hierarchical division multiplexed signal. At this time, the hierarchical division modulator (2571) included in the hierarchical division modulation unit may perform hierarchical division multiplexing corresponding to at least a portion of the first RF core layer SISO BICM signal or the first RF core layer MIMO BICM signals and at least a portion of the first RF enhanced layer MIMO BICM signal to generate first RF hierarchical division multiplexed signals and output the same to the framing & interleaving units (2581, 2583) included in the transmission signal generation unit (2580). At this time, the first RF hierarchical division multiplexed signals may correspond to the first polarization and the second polarization.

[0562] At this time, the hierarchical split modulator (2571) may correspond to the LDM combining unit illustrated in FIG. 14 (LDM of SISO and MIMO), or may correspond to the LDM combining unit illustrated in FIG. 21 (LDM of MIMO and MIMO).

[0563] Likewise, a hierarchical division modulator (2572) included in a hierarchical division modulation unit may perform hierarchical division multiplexing corresponding to at least a portion of the second RF core layer SISO BICM signal or the second RF core layer MIMO BICM signals and at least a portion of the second RF enhanced layer SISO BICM signal or the second RF enhanced layer MIMO BICM signals to generate second RF hierarchical division multiplexed signals and output the signals to the framing & interleaving units (2585, 2587) included in the transmission signal generation unit (2580). At this time, the second RF hierarchical division multiplexed signals may correspond to the first polarization and the second polarization.

[0564] At this time, the hierarchical division modulator (2572) may correspond to the LDM combination unit illustrated in FIG. 14 (LDM of SISO and MIMO), may correspond to the LDM combination unit illustrated in FIG. 21 (LDM of MIMO and MIMO), or may correspond to general LDM configurations consisting of an injection level controller, a combiner, and a power normalizer (LDM of SISO and SISO). Furthermore, if the enhanced layer BICM unit (2543) is not provided, the hierarchical division modulator (2572) may not be provided.

[0565] At this time, the injection level of the enhanced layer can be set individually for each RF channel, and can also be set individually for each polarization (antenna).

[0566] At this time, in order to increase the performance gain by utilizing the frequency diversity characteristics of channel bonding using the SNR averaging method, the two RF channels being channel bonded can use the same injection level to maintain the same broadcast coverage or provide the same signal robustness.

[0567] The transmission signal generation unit (2580) generates at least one first RF transmission signal corresponding to the first RF channel and at least one second RF transmission signal corresponding to the second RF channel among the channel bonded first RF channel and second RF channel.

[0568] That is, the transmission signal generation unit (2580) generates at least one first RF transmission signal corresponding to the at least one hierarchical division multiplexed signal and at least one second RF transmission signal generated based on at least a portion of the at least one second RF core layer BICM signal. At this time, when the enhanced layer BICM unit (2543) is provided, the at least one second RF transmission signal can be generated based on at least one hierarchical division multiplexed signal generated by hierarchically division multiplexing at least a portion of the at least one second RF core layer BICM signal and at least a portion of the at least one second RF enhanced layer BICM signal. At this time, if at least one of the core layer BICM unit (2541) and the enhanced layer BICM unit (2543) corresponds to MIMO, the outputs of the layered division modulator (2572) corresponding to the first polarization and the second polarization can be provided to the framing & interleaving units (2585, 2587), and at least one second RF transmission signal can be a second RF MIMO transmission signal.

[0569] At this time, at least one of the at least one first RF transmission signal and the at least one second RF transmission signal may include a preamble signaling a channel bonding mode of at least one channel-bonded physical layer pipe.

[0570] At this time, the framing & interleaving units (2581, 2583, 2585, 2587) and waveform generators (2582, 2584, 2586, 2588) included in the transmission signal generation unit (2580) have already been sufficiently explained.

[0571] At this time, if both the core layer BICM unit (2541) and the enhanced layer BICM unit (2543) correspond to SISO, the framing & interleaving unit (2587) and the waveform generator (2588) may not be provided, and in this case, the second RF channel may operate as SISO rather than MIMO.

[0572] At this time, for at least one channel-bonded physical layer pipe, all data packets engaged may pass through a common input formatting unit. At this time, the channel-bonded physical layer pipe may refer to two physical layer pipes that are channel-bonded to each other. That is, the two physical layer pipes that are channel-bonded to each other use the same physical layer identifier (L1D_plp_id), and thus may be treated as one channel-bonded physical layer pipe.

[0573] At this time, when SNR averaging channel bonding is performed, after the at least one first RF core layer BICM signal, the at least one first RF enhanced layer BICM signal, and the at least one second RF core layer BICM signal are generated, but before the at least one layered division multiplexed signal is generated, a cell exchange corresponding to the SNR averaging channel bonding may be performed.

[0574] At this time, the at least one first RF enhanced layer BICM signal is an enhanced layer MIMO signal corresponding to MIMO (Multiple-Input Multiple-Output), and when MIMO precoding corresponding to the MIMO is performed, the MIMO precoding may be performed before the cell exchange.

[0575] At this time, when the above SNR averaging channel bonding is performed, bonded streams originating in the same input formatting unit can be contained in the same LDM (Layered Division Multiplexing) layer.

[0576] At this time, the at least one first RF core layer BICM signal is a core layer SISO signal corresponding to SISO (Single-Input Single-Output), the at least one hierarchical division multiplexed signal includes a first polarization signal and a second polarization signal, and the first polarization signal can be generated by superposing a power-controlled signal generated by controlling the power of one of the enhanced layer MIMO signals onto the core layer SISO signal. At this time, the second polarization signal can be another one of the enhanced layer MIMO signals.

[0577] At this time, the at least one first RF transmission signal includes a first polarization transmission signal and a second polarization transmission signal corresponding to the MIMO, and the second polarization transmission signal can be generated based on power scaling applied according to an injection level corresponding to the hierarchical division multiplexing. At this time, the power scaling can be performed based on a scaling coefficient in the IFFT step.

[0578] At this time, at least one of the at least one first RF transmission signal and the at least one second RF transmission signal may include a preamble. At this time, the preamble may include a field signaling a channel bonding mode for at least some of the physical layer pipes (PLPs).

[0579] At this time, the second RF BICM unit (2540) generates at least one second RF enhanced layer BICM signal as well as at least one second RF core layer BICM signal, and the hierarchical division modulator (2572) can perform hierarchical division multiplexing corresponding to at least a portion of the at least one second RF core layer BICM signal and at least a portion of the at least one second RF enhanced layer BICM signal to generate at least one hierarchical division multiplexed signal.

[0580] At this time, when the SNR averaging channel bonding is performed, a first injection level corresponding to hierarchical division multiplexing for a first RF channel corresponding to the first RF transmission signal and a second injection level corresponding to hierarchical division multiplexing for a second RF channel corresponding to the second RF transmission signal may be identical to each other.

[0581] At this time, when a channel-bonded physical layer pipe with the SNR averaging channel bonding is included, layered MIMO configurations for the first RF channel and the second RF channel can be identical between the corresponding subframes.

[0582] At this time, when the SNR averaging channel bonding is performed, the type and injection level of layered MIMO may be the same between the corresponding subframes.

[0583] At this time, when the above SNR averaging channel bonding is performed, the MIMO parameters and layer indices may be the same between the physical layer pipes that are channel bonded to each other.

[0584] For broadcast signals where both channel bonding and layered division multiplexing and MIMO are applied, LDM may be applied to only one RF channel or to both RF channels.

[0585] At this time, for broadcast signals to which both channel bonding and hierarchical division multiplexing and MIMO are applied, MIMO may be applied to only one RF channel or to both RF channels.

[0586] At this time, for broadcast signals to which both channel bonding and hierarchical division multiplexing and MIMO are applied, channel bonding may be applied to some physical layer pipe(s) of the two RF channels, or channel bonding may be applied to all physical layer pipe(s).

[0587] At this time, for a broadcast signal to which both channel bonding and hierarchical division multiplexing and MIMO are applied, MIMO may be applied only to the enhanced layer physical layer pipe, MIMO may be applied to both the core layer physical layer pipe and the enhanced layer physical layer pipe, or MIMO may be applied only to the core layer physical layer pipe.

[0588] At this time, in the case of a broadcast signal to which both channel bonding and layered division multiplexing and MIMO are applied, the physical layer pipes of two RF channels can be channel bonded to each other regardless of the layer to which they are transmitted. That is, the core layer physical layer pipes of two RF channels can be channel bonded to each other, the enhanced layer physical layer pipes of two RF channels can be channel bonded to each other, or the core layer physical layer pipe and the enhanced layer physical layer pipe of two RF channels can be channel bonded.

[0589] At this time, for broadcast signals to which both channel bonding and layered division multiplexing and MIMO are applied, channel bonding may be applied independently to physical layer pipes transmitted through the two layers, or channel bonding may be applied to all physical layer pipes transmitted through the two layers.

[0590] For channel-bonded physical layer pipes, all related data packets may pass through a common input formatting unit. In this case, the same L1D_plp_id value may be used for all related RF channels. Baseband packets generated by an input formatting unit dedicated to a channel-bonded physical layer pipe may be split into two parallel streams by a stream splitter. In this case, baseband packets unrelated to channel bonding may bypass the stream splitter.

[0591] At this time, plain channel bonding and SNR averaging channel bonding can be used with layered MIMO.

[0592] When SNR averaging channel bonding is used, the bonded streams originating in the same input formatting unit may be required to be included in the same LDM layer.

[0593] At this time, if cell swapping is enabled, the cell swapping process may need to be applied to the cells produced at the end of the MIMO precoding stage. These cells may be cells after the MIMO precoding stage for MIMO physical layer pipe(s) and post-BICM cells for SISO physical layer pipe(s), regardless of whether MIMO precoding is enabled.

[0594] The output streams of the cell exchanger(s) may have to undergo LDM combining between each coupled stream pair of core layer cell(s) and enhanced layer cell(s) belonging to the same polarization.

[0595] When channel-bonded physical layer pipes corresponding to SNR averaging channel bonding are included, layered MIMO configurations for the bonded RF channels may be required to be identical between the corresponding subframes (each in a different RF channel). At this time, the layered MIMO types (Type A or B in Table 17) and injection levels for the two RF channels may be required to be identical between the subframes. At this time, MIMO parameters and layer indices may also be required to be identical between the channel-bonded physical layer pipes. Since individual PLPs within a combined (LDM combined) PLP corresponding to the LDM combining block output can independently configure the use and format of channel bonding, channel bonding need not necessarily be applied simultaneously.

[0596] When plain channel bonding is used, the layered MIMO types, layer indices, injection levels, and other layered MIMO parameters may differ between the engaged physical layer pipes in different RF channels. Other scheduling parameters may also differ. Therefore, plain channel bonding used with layered MIMO does not restrict channel bonding to a homogeneous PLP pair. The channel-bonded physical layer pipes may consist of SISO physical layer pipes and MIMO physical layer pipes, or some of the layered MIMO subframes may be bonded with those that do not use layered MIMO.

[0597] As described above, when MIMO is applied to an RF channel, PLPs (Physical Layer Pipes) are multiplexed by LDM, and some or all PLPs of each RF channel are combined by channel bonding, appropriate broadcast signal scheduling can be performed.

[0598] At this time, multiple broadcast signals carrying multiple broadcast services may be multiplexed onto a single RF channel. In this case, a single broadcast signal is associated with a physical layer pipe.

[0599] A broadcast signal configured by scheduling multiple physical layer pipes can be channel bonded with a broadcast signal transmitted through another RF channel.

[0600] Broadcast signals of two RF channels combined through channel bonding technology may have different physical layer pipe scheduling applied to them depending on the channel bonding method, and whether channel bonding is applied to physical layer pipes scheduled for one RF channel may be determined independently. In this case, channel bonding may be applied to all physical layer pipes scheduled for one RF channel, or only some physical layer pipe(s) may be channel bonded with physical layer pipe(s) of another channel.

[0601] At this time, physical layer pipe scheduling (PLP scheduling parameters) can be expressed by various signaling parameters such as subframe parameters, L1-Detail PLP parameters, LDM parameters, channel bonding parameters, cell multiplexing parameters, MIMO parameters, and time interleaver parameters.

[0602] In the case of plain channel bonding technology, broadcast signals of two RF channels can have different, independent physical layer pipe scheduling. For example, LDM parameters related to LDM settings, multiplexing schemes, cell multiplexing related to framing, and subframe and physical layer pipe parameters can be applied differently.

[0603] For example, physical layer pipes belonging to different layers may be scheduled to be channel bonded to each other, and even if LDM is applied to the physical layer pipes, the core physical layer pipe and the enhanced physical layer pipe do not need to be channel bonded at the same time, and the core physical layer pipe and the enhanced physical layer pipe may independently decide whether to channel bond.

[0604] For example, physical layer pipes that are channel-bonded to each other may be scheduled with different PLP start positions, PLP sizes, and PLP types on each RF channel.

[0605] When a channel bonding method using an SNR averaging method is used, a cell switch may be activated so that some of the cells corresponding to the physical layer pipes to which channel bonding of two RF channels is applied may be exchanged with each other. In this way, in the case of physical layer pipes where channel bonding is performed in a cross-channel bonding method that exchanges data of two RF channels, different physical layer pipe scheduling may be applied. At this time, when the complexity of transmission and reception is taken into consideration, the same physical layer pipe scheduling may be applied. At this time, applying the same physical layer pipe scheduling may mean that all or part of various signaling parameters, such as the scheduling of the subframe in which the corresponding physical layer pipe exists (subframe parameters), physical layer pipe parameters, LDM parameters, channel bonding parameters, cell multiplexing parameters, MIMO parameters, and time interleaver parameters, are applied identically for the two RF channels.

[0606] For example, the same PLP scheduling can be set on two RF channels because the layer indices, which are hierarchical information of the physical layer pipes being channel-coupled, are the same. That is, a core PLP can be coupled only with a core PLP, and an enhanced PLP can be coupled only with an enhanced PLP.

[0607] This scheduling method can be equally applied to physical layer pipes with MIMO. That is, the described broadcast signal scheduling method can also be applied to broadcast signals transmitted over RF channels with MIMO.

[0608] For example, if one RF channel is scheduled to multiple physical layer pipes and MIMO is applied to some or all of the physical layer pipe(s), other RF channels to which channel bonding is applied may also have MIMO applied to some or all of the physical layer pipe(s), or none of the physical layer pipes. That is, a physical layer pipe to which MIMO is applied may be channel bonded with a physical layer pipe to which MIMO is not applied, and the two physical layer pipes may be scheduled to different RF channels.

[0609] Figures 26 to 28 are block diagrams showing other examples of broadcast signal transmission devices in which MIMO, channel bonding, and hierarchical division multiplexing are used together.

[0610] Referring to FIG. 26, a broadcast signal transmission device in which MIMO, channel bonding and layered division multiplexing are used together includes input formatting units (2611, 2612), stream distributors (2621, 2622), a first RF BICM unit (2630), a second RF BICM unit (2640), MIMO precoding units (2551, 2552, 2553, 2554), cell switches (2661, 2662, 2663, 2664), a first RF layered division multiplexing unit (2671), a second RF layered division multiplexing unit (2672) and a transmission signal generation unit (2580).

[0611] The example illustrated in Fig. 26 is one in which both SNR averaging channel bonding and plain channel bonding can be applied, and corresponds to a case in which channel bonding is applied to the same layer.

[0612] In the example illustrated in FIG. 26, the output of the input formatting unit (2611) is provided to the stream distributor (2621), and the two outputs of the stream distributor (2621) are provided to the core layer BICM unit (2631) and the core layer BICM unit (2641), respectively. At this time, the output of the input formatting unit (2612) is provided to the stream distributor (2622), and the two outputs of the stream distributor (2622) are provided to the enhanced layer BICM unit (2633) and the enhanced layer BICM unit (2643), respectively.

[0613] The core layer BICM unit (2631) and the enhanced layer BICM unit (2633) included in the first RF BICM unit (2630) and the core layer BICM unit (2641) and the enhanced layer BICM unit (2643) included in the second RF BICM unit (2640) all provide outputs corresponding to MIMO.

[0614] The MIMO precoding unit (2551) can perform MIMO precoding corresponding to the core layer BICM unit (2631).

[0615] The MIMO precoding unit (2552) can perform MIMO precoding corresponding to the enhanced layer BICM unit (2633).

[0616] The MIMO precoding unit (2553) can perform MIMO precoding corresponding to the core layer BICM unit (2641).

[0617] The MIMO precoding unit (2554) can perform MIMO precoding corresponding to the core layer BICM unit (2643).

[0618] The cell exchanger (2661) performs cell exchange between one of the MIMO outputs of the core layer BICM unit (2631) corresponding to the first polarization and one of the MIMO outputs of the core layer BICM unit (2641) corresponding to the first polarization. At this time, one of the MIMO outputs of the core layer BICM unit (2631) corresponding to the first polarization and one of the MIMO outputs of the core layer BICM unit (2641) corresponding to the first polarization can be input to the cell exchanger (2661) via the MIMO precoding unit (2551) and the MIMO precoding unit (2553).

[0619] The cell exchanger (2662) performs cell exchange between one of the MIMO outputs of the enhanced layer BICM unit (2633) corresponding to the first polarization and one of the MIMO outputs of the enhanced layer BICM unit (2643) corresponding to the first polarization. At this time, one of the MIMO outputs of the enhanced layer BICM unit (2633) corresponding to the first polarization and one of the MIMO outputs of the enhanced layer BICM unit (2643) corresponding to the first polarization can be input to the cell exchanger (2662) via the MIMO precoding unit (2552) and the MIMO precoding unit (2554).

[0620] The cell exchanger (2663) performs cell exchange between one of the MIMO outputs of the core layer BICM unit (2631) corresponding to the second polarization and one of the MIMO outputs of the core layer BICM unit (2641) corresponding to the second polarization. At this time, one of the MIMO outputs of the core layer BICM unit (2631) corresponding to the second polarization and one of the MIMO outputs of the core layer BICM unit (2641) corresponding to the second polarization can be input to the cell exchanger (2663) via the MIMO precoding unit (2551) and the MIMO precoding unit (2553).

[0621] The cell exchanger (2664) performs cell exchange between one of the MIMO outputs of the enhanced layer BICM unit (2633) corresponding to the second polarization and one of the MIMO outputs of the enhanced layer BICM unit (2643) corresponding to the second polarization. At this time, one of the MIMO outputs of the enhanced layer BICM unit (2633) corresponding to the second polarization and one of the MIMO outputs of the enhanced layer BICM unit (2643) corresponding to the second polarization can be input to the cell exchanger (2664) via the MIMO precoding unit (2552) and the MIMO precoding unit (2554).

[0622] The first RF layer division multiplexer (2671) includes layer division multiplexers (2673 and 2674), and the second RF layer division multiplexer (2672) includes layer division multiplexers (2675, 2676).

[0623] The hierarchical division multiplexer (2673) hierarchically division multiplexes one of the MIMO outputs of the core layer BICM unit (2631) corresponding to the first polarization (which may be provided through one or more of the MIMO precoding unit (2551) and / or the cell switch (2661)) and one of the MIMO outputs of the enhanced layer BICM unit (2633) corresponding to the first polarization (which may be provided through one or more of the MIMO precoding unit (2552) and / or the cell switch (2662)) to generate a hierarchically division multiplexed signal and outputs the signal to the framing & interleaving unit (2581).

[0624] The hierarchical division multiplexer (2674) hierarchically division multiplexes one of the MIMO outputs of the core layer BICM unit (2631) corresponding to the second polarization (which may be provided through one or more of the MIMO precoding unit (2551) and / or the cell switch (2663)) and one of the MIMO outputs of the enhanced layer BICM unit (2633) corresponding to the second polarization (which may be provided through one or more of the MIMO precoding unit (2552) and / or the cell switch (2664)) to generate a hierarchically division multiplexed signal and outputs the signal to the framing & interleaving unit (2583).

[0625] The hierarchical division multiplexer (2675) hierarchically division multiplexes one of the MIMO outputs of the core layer BICM unit (2641) corresponding to the first polarization (which may be provided through one or more of the MIMO precoding unit (2553) and / or the cell switch (2661)) and one of the MIMO outputs of the enhanced layer BICM unit (2643) corresponding to the first polarization (which may be provided through one or more of the MIMO precoding unit (2554) and / or the cell switch (2662)) to generate a hierarchically division multiplexed signal and outputs the signal to the framing & interleaving unit (2585).

[0626] The hierarchical division multiplexer (2676) hierarchically division multiplexes one of the MIMO outputs of the core layer BICM unit (2641) corresponding to the second polarization (which may be provided through one or more of the MIMO precoding unit (2553) and / or the cell switch (2663)) and one of the MIMO outputs of the enhanced layer BICM unit (2643) corresponding to the second polarization (which may be provided through one or more of the MIMO precoding unit (2554) and / or the cell switch (2664)) to generate a hierarchically division multiplexed signal and outputs the signal to the framing & interleaving unit (2587).

[0627] The framing & interleaving units (2581, 2583, 2585, 2587) and waveform generators (2582, 2584, 2586, 2588) are as described above.

[0628] In the example illustrated in FIG. 26, the hierarchical division multiplexers (2673, 2674, 2675, 2676) may each be configured with a combiner, an injection level controller, and a power normalizer as illustrated in FIG. 14, etc., and may operate at different injection levels, or may all operate at the same injection level. In particular, when SNR averaging channel bonding is used, the hierarchical division multiplexers (2673, 2674, 2675, 2676) may all operate at the same injection level.

[0629] Referring to FIG. 27, a broadcast signal transmission device in which MIMO, channel bonding, and hierarchical division multiplexing are used together includes input formatting units (2711, 2712, 2713), a stream distributor (2720), a first RF BICM unit (2730), a second RF BICM unit (2740), MIMO precoding units (2552, 2554), cell switches (2662, 2664), and hierarchical division multiplexers (2771, 2772), and a transmission signal generation unit (2580).

[0630] The example illustrated in Fig. 27 is one in which both SNR averaging channel bonding and plain channel bonding can be applied, and corresponds to a case in which channel bonding and MIMO are applied only to the enhanced layer.

[0631] In the example illustrated in Fig. 27, the output of the input formatting unit (2711) is provided to the core layer BICM unit (2731), and the output of the input formatting unit (2713) is provided to the core layer BICM unit (2741). Therefore, channel bonding is not applied to the core layer. Furthermore, the core layer BICM units (2731, 2741) output output signals corresponding to SISO.

[0632] The output of the input formatting unit (2712) is provided to the stream distributor (2720), and the two outputs of the stream distributor (2720) are provided to the enhanced layer BICM unit (2733) and the enhanced layer BICM unit (2743), respectively.

[0633] Both the enhanced layer BICM unit (2733) and the enhanced layer BICM unit (2743) provide outputs corresponding to MIMO.

[0634] The MIMO precoding unit (2552) can perform MIMO precoding corresponding to the enhanced layer BICM unit (2733).

[0635] The MIMO precoding unit (2554) can perform MIMO precoding corresponding to the enhanced layer BICM unit (2743).

[0636] The cell exchanger (2662) performs cell exchange between one of the MIMO outputs of the enhanced layer BICM unit (2733) corresponding to the first polarization and one of the MIMO outputs of the enhanced layer BICM unit (2743) corresponding to the first polarization. At this time, one of the MIMO outputs of the enhanced layer BICM unit (2733) corresponding to the first polarization and one of the MIMO outputs of the enhanced layer BICM unit (2743) corresponding to the first polarization can be input to the cell exchanger (2662) via the MIMO precoding unit (2552) and the MIMO precoding unit (2554).

[0637] The cell exchanger (2664) performs cell exchange between one of the MIMO outputs of the enhanced layer BICM unit (2733) corresponding to the second polarization and one of the MIMO outputs of the enhanced layer BICM unit (2743) corresponding to the second polarization. At this time, one of the MIMO outputs of the enhanced layer BICM unit (2733) corresponding to the second polarization and one of the MIMO outputs of the enhanced layer BICM unit (2743) corresponding to the second polarization can be input to the cell exchanger (2664) via the MIMO precoding unit (2552) and the MIMO precoding unit (2554).

[0638] The hierarchical division multiplexer (2771) hierarchically division multiplexes one of the SISO outputs of the core layer BICM unit (2731) and the MIMO outputs of the enhanced layer BICM unit (2733) corresponding to the first polarization (which may be provided through one or more of the MIMO precoding unit (2552) and / or the cell switch (2662)) to generate a hierarchically division multiplexed signal (the first polarization) and outputs it to the framing & interleaving unit (2581). At this time, the hierarchical division multiplexer (2771) can output one of the MIMO outputs of the enhanced layer BICM unit (2733) corresponding to the second polarization (which can be provided through one or more of the MIMO precoding unit (2552) and / or the cell switch (2664)) as is to the framing & interleaving unit (2583).

[0639] The hierarchical division multiplexer (2772) hierarchically division multiplexes one of the SISO outputs of the core layer BICM unit (2741) and the MIMO outputs of the enhanced layer BICM unit (2743) corresponding to the first polarization (which may be provided through one or more of the MIMO precoding unit (2554) and / or the cell switch (2662)) to generate a hierarchically division multiplexed signal (the first polarization) and outputs it to the framing & interleaving unit (2585). At this time, the hierarchical division multiplexer (2772) can output one of the MIMO outputs of the enhanced layer BICM unit (2743) corresponding to the second polarization (which can be provided through one or more of the MIMO precoding unit (2554) and / or the cell switcher (2664)) as is to the framing & interleaving unit (2587).

[0640] At this time, the hierarchical division multiplexers (2771, 2772) may each correspond to the LDM coupling unit illustrated in FIG. 14.

[0641] The framing & interleaving units (2581, 2583, 2585, 2587) and waveform generators (2582, 2584, 2586, 2588) are as described above.

[0642] Even in the example illustrated in Fig. 27, when SNR averaging channel bonding is used, all hierarchical division multiplexers (2771, 2772) can operate at the same injection level.

[0643] Referring to FIG. 28, a broadcast signal transmission device in which MIMO, channel bonding, and layered division multiplexing are used together includes input formatting units (2811, 2812), stream distributors (2821, 2822), a first RF BICM unit (2630), a second RF BICM unit (2640), MIMO precoding units (2551, 2552, 2553, 2554), cell switches (2661, 2662, 2663, 2664), a first RF layered division multiplexing unit (2671), a second RF layered division multiplexing unit (2672), and a transmission signal generation unit (2580).

[0644] The example illustrated in Fig. 28 is applicable to both SNR averaging channel bonding and plain channel bonding, and corresponds to a case where channel bonding is applied to different layers.

[0645] In the example illustrated in FIG. 28, the output of the input formatting unit (2811) is provided to the stream distributor (2821), and the two outputs of the stream distributor (2821) are provided to the core layer BICM unit (2631) and the enhanced layer BICM unit (2643), respectively. At this time, the output of the input formatting unit (2812) is provided to the stream distributor (2822), and the two outputs of the stream distributor (2822) are provided to the enhanced layer BICM unit (2633) and the core layer BICM unit (2641), respectively.

[0646] Finally, in the example illustrated in FIG. 28, unlike the example illustrated in FIG. 26, channel bonding between the core layer of the first channel and the enhanced layer of the second channel and channel bonding between the core layer of the second channel and the enhanced layer of the first channel can be applied.

[0647] The operation of the remaining components is the same as described in Fig. 26.

[0648] In the block diagram described above, the dashed blocks that do not include solid blocks may represent blocks that can be disabled depending on the configuration related to LDM, MIMO, and channel bonding. Furthermore, solid arrows may represent signal flows common to all configurations, while dashed arrows may represent optional signal flows that may not exist depending on the configuration.

[0649] Figure 29 is a flowchart illustrating a broadcast signal transmission method according to one embodiment of the present invention.

[0650] Referring to FIG. 29, a broadcast signal transmission method according to an embodiment of the present invention generates at least one first RF core layer BICM signal, at least one first RF enhanced layer BICM signal, and at least one second RF core layer BICM signal (S2910).

[0651] At this time, when SNR averaging channel bonding is performed, after the at least one first RF core layer BICM signal, the at least one first RF enhanced layer BICM signal, and the at least one second RF core layer BICM signal are generated, but before the at least one layered division multiplexed signal is generated, a cell exchange corresponding to the SNR averaging channel bonding may be performed.

[0652] At this time, when the above SNR averaging channel bonding is performed, bonded streams originating in the same input formatting unit can be contained in the same LDM (Layered Division Multiplexing) layer.

[0653] At this time, the at least one first RF enhanced layer BICM signal is an enhanced layer MIMO signal corresponding to MIMO (Multiple-Input Multiple-Output), and when MIMO precoding corresponding to the MIMO is performed, the MIMO precoding may be performed before the cell exchange.

[0654] In addition, a broadcast signal transmission method according to one embodiment of the present invention performs layer division multiplexing corresponding to at least a portion of the at least one first RF core layer BICM signal and at least a portion of the at least one first RF enhanced layer BICM signal to generate at least one layer division multiplexed signal (S2920).

[0655] At this time, the at least one first RF core layer BICM signal is a core layer SISO signal corresponding to SISO (Single-Input Single-Output), and the at least one hierarchical division multiplexed signal may include a first polarization signal and a second polarization signal. At this time, the first polarization signal may be generated by superposing a power-controlled signal generated by controlling the power of one of the enhanced layer MIMO signals onto the core layer SISO signal. At this time, the second polarization signal may be another one of the enhanced layer MIMO signals.

[0656] At this time, step (S2910) can generate at least one second RF core layer BICM signal as well as at least one second RF enhanced layer BICM signal. At this time, step (S2920) can perform hierarchical division multiplexing corresponding to at least a portion of the at least one second RF core layer BICM signal and at least a portion of the at least one second RF enhanced layer BICM signal to generate at least one hierarchical division multiplexed signal.

[0657] In addition, a broadcast signal transmission method according to one embodiment of the present invention generates at least one first RF transmission signal corresponding to the first RF channel and at least one second RF transmission signal corresponding to the second RF channel among the first RF channel and the second RF channel that are channel bonded (S2930).

[0658] At this time, at least one of the at least one first RF transmission signal and the at least one second RF transmission signal may include a preamble signaling a channel bonding mode of at least one channel-bonded physical layer pipe.

[0659] At this time, for at least one channel bonded physical layer pipe, all data packets engaged may pass through a common input formatting unit.

[0660] At this time, the at least one first RF transmission signal may correspond to the at least one hierarchical division multiplexed signal, and the at least one second RF transmission signal may be generated based on at least a portion of the at least one second RF core layer BICM signal.

[0661] At this time, the at least one first RF transmission signal may include a first polarization transmission signal and a second polarization transmission signal corresponding to the MIMO. At this time, the second polarization transmission signal may be generated based on power scaling applied according to an injection level corresponding to the hierarchical division multiplexing. At this time, the power scaling may be performed based on a scaling coefficient in the IFFT step.

[0662] At this time, at least one of the at least one first RF transmission signal and the at least one second RF transmission signal may include a preamble signaling a channel bonding mode for at least some of the Physical Layer Pipes (PLPs).

[0663] At this time, when the SNR averaging channel bonding is performed, a first injection level corresponding to hierarchical division multiplexing for a first RF channel corresponding to the first RF transmission signal and a second injection level corresponding to hierarchical division multiplexing for a second RF channel corresponding to the second RF transmission signal may be identical to each other.

[0664] At this time, when a channel-bonded physical layer pipe with the SNR averaging channel bonding is included, layered MIMO configurations for the first RF channel and the second RF channel can be identical between the corresponding subframes.

[0665] At this time, when the SNR averaging channel bonding is performed, the type and injection level of layered MIMO may be the same between the corresponding subframes.

[0666] At this time, when the above SNR averaging channel bonding is performed, the MIMO parameters and layer indices may be the same between the physical layer pipes that are channel bonded to each other.

[0667] Figure 30 is a flowchart illustrating a broadcast signal receiving method according to one embodiment of the present invention.

[0668] Referring to FIG. 30, a broadcast signal receiving method according to an embodiment of the present invention receives at least one first RF transmission signal corresponding to the first RF channel and at least one second RF transmission signal corresponding to the second RF channel among the first RF channel and the second RF channel that are channel bonded (S3010).

[0669] At this time, the at least one first RF transmission signal may correspond to at least one hierarchical division multiplexed signal generated by performing hierarchical division multiplexing corresponding to at least a portion of at least one first RF core layer BICM signal and at least a portion of at least one first RF enhanced layer BICM signal.

[0670] In addition, a broadcast signal receiving method according to one embodiment of the present invention restores a preamble using at least one of the at least one first RF transmission signal and the at least one second RF transmission signal (S3020).

[0671] In addition, a broadcast signal receiving method according to one embodiment of the present invention performs a reverse process of channel bonding corresponding to a channel bonding format field included in the preamble (S3030).

[0672] At this time, the channel bonding format field may signal the channel bonding mode of at least one channel-bonded physical layer pipe.

[0673] At this time, the channel bonding format field can indicate either a plain channel bonding mode or an SNR averaging channel bonding mode with 2 bits.

[0674] At this time, when the channel bonding format field corresponds to SNR averaging channel bonding, after the at least one first RF core layer BICM signal, the at least one first RF enhanced layer BICM signal, and the at least one second RF core layer BICM signal are generated, and before the at least one layered division multiplexed signal is generated, a cell exchange corresponding to the SNR averaging channel bonding may be performed to generate the at least one first RF transmission signal.

[0675] At this time, the at least one first RF enhanced layer BICM signal is an enhanced layer MIMO signal corresponding to MIMO (Multiple-Input Multiple-Output), and when MIMO precoding corresponding to the MIMO is performed, the MIMO precoding may be performed before the cell exchange.

[0676] At this time, for at least one channel bonded physical layer pipe, all data packets engaged may pass through a common input formatting unit.

[0677] At this time, when the above SNR averaging channel bonding is performed, bonded streams originating in the same input formatting unit can be contained in the same LDM (Layered Division Multiplexing) layer.

[0678] At this time, when a channel-bonded physical layer pipe with the SNR averaging channel bonding is included, layered MIMO configurations for the first RF channel and the second RF channel can be identical between the corresponding subframes.

[0679] At this time, when the SNR averaging channel bonding is performed, the type and injection level of layered MIMO may be the same between the corresponding subframes.

[0680] At this time, when the above SNR averaging channel bonding is performed, the MIMO parameters and layer indices may be the same between the physical layer pipes that are channel bonded to each other.

[0681] Figure 31 is a block diagram showing a computer system configuration according to one embodiment of the present invention.

[0682] The broadcast signal transmitting device, the broadcast signal receiving device and the individual components constituting these devices according to the embodiment can be implemented in a computer system (3100).

[0683] The computer system (3100) may include one or more processors (3110), memory (3130), user interface input devices (3140), user interface output devices (3150), and storage (3160) that communicate with each other via a bus (3120). The computer system (3100) may further include a network interface (3170) connected to a network (3180). The processor (3110) may be a central processing unit or a semiconductor device that executes programs or processing instructions stored in the memory (3130) or storage (3160). The memory (3130) and storage (3160) may be storage media that include at least one of a volatile medium, a nonvolatile medium, a removable medium, a non-removable medium, a communication medium, or an information transmission medium. For example, the memory (3130) may include a ROM (3131) or a RAM (3132).

[0684] At this time, at least one program can be recorded in the memory (3130).

[0685] At this time, the processor (3110) can execute the program. At this time, the program can perform each step illustrated in FIG. 6, each step illustrated in FIG. 7, each step illustrated in FIG. 29, or each step illustrated in FIG. 30.

[0686]

[0687] As described above, the broadcast signal transmission device, method, and broadcast signal reception method according to the present invention are not limited to the configurations and methods of the embodiments described above, but the embodiments may be configured by selectively combining all or part of the embodiments so that various modifications can be made.

Claims

1. A first RF BICM unit generating at least one first RF core layer BICM signal and at least one first RF enhanced layer BICM signal; A second RF BICM section generating at least one second RF core layer BICM signal; A hierarchical division modulation unit that performs hierarchical division multiplexing corresponding to at least a portion of the at least one first RF core layer BICM signal and at least a portion of the at least one first RF enhanced layer BICM signal to generate at least one hierarchical division multiplexed signal; and A transmission signal generation unit that generates at least one first RF transmission signal corresponding to the first RF channel and at least one second RF transmission signal corresponding to the second RF channel among channel bonded first RF channels and second RF channels, At least one of the above at least one first RF transmission signal and at least one second RF transmission signal A broadcast signal transmitting device comprising a preamble signaling a channel bonding mode of at least one channel-bonded physical layer pipe.

2. In claim 1, A broadcast signal transmission device, wherein for at least one channel bonded physical layer pipe, all data packets engaged pass through a common input formatting unit.

3. In claim 1, When SNR averaging channel bonding is performed, after the at least one first RF core layer BICM signal, the at least one first RF enhanced layer BICM signal, and the at least one second RF core layer BICM signal are generated, Before at least one hierarchical division multiplexed signal is generated, A broadcast signal transmission device in which cell exchange corresponding to the above SNR averaging channel bonding is performed.

4. In claim 3, A broadcast signal transmission device in which, when the above SNR averaging channel bonding is performed, bonded streams originating in the same input formatting unit are contained in the same LDM (Layered Division Multiplexing) layer.

5. In claim 4, The at least one first RF enhanced layer BICM signal is an enhanced layer MIMO signal corresponding to MIMO (Multiple-Input Multiple-Output), A broadcast signal transmission device, wherein, when MIMO precoding corresponding to the above MIMO is performed, the MIMO precoding is performed before the cell exchange.

6. In claim 5, The at least one first RF core layer BICM signal is a core layer SISO signal corresponding to SISO (Single-Input Single-Output), At least one hierarchically divided multiplexed signal is Containing a first polarization signal and a second polarization signal, The first polarization signal is generated by superposing a power-controlled signal generated by controlling the power of one of the enhanced layer MIMO signals onto the core layer SISO signal, A broadcast signal transmitting device, wherein the second polarization signal is another one of the enhanced layer MIMO signals.

7. In claim 4, A broadcast signal transmission device, wherein when a channel-bonded physical layer pipe with the SNR averaging channel bonding is included, layered MIMO configurations for the first RF channel and the second RF channel are identical between the corresponding subframes.

8. In claim 7, A broadcast signal transmission device in which the type and injection level of layered MIMO are the same between the corresponding subframes when the above SNR averaging channel bonding is performed.

9. In claim 8, When the above SNR averaging channel bonding is performed, the MIMO parameters and layer indices are the same between the physical layer pipes that are channel bonded to each other, a broadcast signal transmission device.

10. A step of generating at least one first RF core layer BICM signal, at least one first RF enhanced layer BICM signal, and at least one second RF core layer BICM signal; A step of performing layer division multiplexing corresponding to at least a portion of the at least one first RF core layer BICM signal and at least a portion of the at least one first RF enhanced layer BICM signal to generate at least one layer division multiplexed signal; and A step of generating at least one first RF transmission signal corresponding to the first RF channel and at least one second RF transmission signal corresponding to the second RF channel among the first RF channel and the second RF channel that are channel bonded, At least one of the above at least one first RF transmission signal and at least one second RF transmission signal A method for transmitting a broadcast signal, comprising a preamble signaling a channel bonding mode of at least one channel-bonded physical layer pipe.

11. In claim 10, A method for transmitting a broadcast signal, wherein for at least one channel bonded physical layer pipe, all data packets engaged pass through a common input formatting unit.

12. In claim 10, When SNR averaging channel bonding is performed, after the at least one first RF core layer BICM signal, the at least one first RF enhanced layer BICM signal, and the at least one second RF core layer BICM signal are generated, Before at least one hierarchical division multiplexed signal is generated, A broadcast signal transmission method in which cell exchange corresponding to the above SNR averaging channel bonding is performed.

13. In claim 12, A method for transmitting a broadcast signal, wherein when the above SNR averaging channel bonding is performed, bonded streams originating in the same input formatting unit are contained in the same LDM (Layered Division Multiplexing) layer.

14. In claim 13, The at least one first RF enhanced layer BICM signal is an enhanced layer MIMO signal corresponding to MIMO (Multiple-Input Multiple-Output), A method for transmitting a broadcast signal, wherein, when MIMO precoding corresponding to the above MIMO is performed, the MIMO precoding is performed before the cell exchange.

15. In claim 14, The at least one first RF core layer BICM signal is a core layer SISO signal corresponding to SISO (Single-Input Single-Output), At least one hierarchically divided multiplexed signal is Containing a first polarization signal and a second polarization signal, The first polarization signal is generated by superposing a power-controlled signal generated by controlling the power of one of the enhanced layer MIMO signals onto the core layer SISO signal, A method for transmitting a broadcast signal, wherein the second polarization signal is another one of the enhanced layer MIMO signals.

16. In claim 13, A method for transmitting a broadcast signal, wherein when a channel-bonded physical layer pipe with the SNR averaging channel bonding is included, layered MIMO configurations for the first RF channel and the second RF channel are identical between the corresponding subframes.

17. In claim 16, A broadcast signal transmission method in which the type and injection level of layered MIMO are the same between the corresponding subframes when the above SNR averaging channel bonding is performed.

18. In claim 17, A method for transmitting a broadcast signal, wherein when the above SNR averaging channel bonding is performed, MIMO parameters and layer indices are the same between physical layer pipes that are channel bonded to each other.

19. A step of receiving at least one first RF transmission signal corresponding to the first RF channel and at least one second RF transmission signal corresponding to the second RF channel among the first RF channel and the second RF channel that are channel bonded; A step of restoring a preamble using at least one of the at least one first RF transmission signal and the at least one second RF transmission signal; and A step of performing a reverse process of channel bonding corresponding to a channel bonding format field included in the above preamble is included, A method for receiving a broadcast signal, wherein the channel bonding format field signals a channel bonding mode of at least one channel-bonded physical layer pipe.

20. In claim 19, At least one of the first RF transmission signals A method for receiving a broadcast signal, the method comprising: performing layer division multiplexing corresponding to at least a portion of at least one first RF core layer BICM signal and at least a portion of at least one first RF enhanced layer BICM signal, wherein the layer division multiplexing corresponds to at least one layer division multiplexed signal.

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