Apparatus for transmitting broadcasting signal using multiple transmission antennas and layer division multiplexing, and method using same

Abstract

Disclosed are an apparatus for transmitting a broadcasting signal using multiple transmission antennas and layer division multiplexing, and a method using same. An apparatus for transmitting a broadcasting signal according to one embodiment of the present invention comprises: a core layer MIMO signal generation unit for generating core layer MIMO signals; an enhanced layer MIMO signal generation unit for generating enhanced layer MIMO signals; an LDM combining unit for generating a first superposition signal corresponding to a first polarization and a second superposition signal corresponding to a second polarization by performing layer division multiplexing on the core layer MIMO signals and the enhanced layer MIMO signals; an L1 signaling generation unit for generating injection level signaling information regarding injection levels corresponding to the enhanced layer MIMO signals; and a transmission signal generation unit for generating 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.

Description

Broadcast signal transmission device using multiple transmission antennas and hierarchical division multiplexing and method using the same

[0001] The present invention relates to a layered division multiplexing technology for a broadcasting system, and more particularly, to a broadcasting signal transmission / reception system that simultaneously supports layered division multiplexing technology and MIMO (Multi-Input Multi-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, have attempted to overcome the transmission capacity limitations of a single broadcast frequency by applying multiple antenna technologies such as MIMO (Multiple Input Multiple Output). In addition to TDM (Time Division Multiplexing) and FDM (Frequency Division Multiplexing), they have adopted layered division multiplexing (LDM) technology to support multiple services simultaneously. Although LDM is somewhat more complex than TDM and FDM, it offers a high level of flexibility and improved system performance.

[0004] Layered division multiplexing (LDM) refers to a system that combines multiple layers into a single transmission layer. In its simplest form, a system with two layers—a core layer and an enhanced layer—is considered. The core layer typically refers to a layer with higher reception robustness than the enhanced layer. In the ATSC 3.0 standard, the transmit power allocated to the core layer is significantly greater than that allocated to the enhanced layer, inducing the receiver to prioritize decoding of the core layer.

[0005] Korean Patent Publication No. 10-2018-0132525 proposes a structure that combines MIMO and layered division multiplexing (LDM) technology for broadcast signal transmission and reception. Specifically, Korean Patent Publication No. 10-2018-0132525 discloses two structures: one in which MIMO is applied to both the core and enhanced layers, and one in which MIMO is applied to only one of the core or enhanced layers.

[0006] However, Korean Patent Publication No. 10-2018-0132525 is completely silent on the signaling of parameters for layer division multiplexing or parameters for MIMO when layer division multiplexing and MIMO are applied together.

[0007] Therefore, there is an urgent need for a new technology that can efficiently and appropriately signal the parameters for both hierarchical division multiplexing and MIMO technologies.

[0008] An object of the present invention is to efficiently signal injection level information of layer division multiplexing when transmitting / receiving broadcast signals using layer division multiplexing and MIMO technology together.

[0009] In addition, an object of the present invention is to efficiently signal MIMO precoding signaling fields of MIMO when transmitting / receiving broadcast signals using layered division multiplexing and MIMO technology together.

[0010] In addition, an object of the present invention is to efficiently signal signaling fields for layer division multiplexing and MIMO while preventing an increase in transmission / reception complexity when transmitting / receiving broadcast signals using layer division multiplexing and MIMO technology together.

[0011] In order to achieve the above object, a broadcast signal transmission device according to the present invention includes a core layer MIMO signal generation unit for generating core layer MIMO signals; an enhanced layer MIMO signal generation unit for generating enhanced layer MIMO signals; an LDM combiner for hierarchically multiplexing the core layer MIMO signals and the enhanced layer MIMO signals to generate a first superposition signal corresponding to a first polarization and a second superposition signal corresponding to a second polarization; an L1 signaling generation unit for generating injection level signaling information regarding injection levels corresponding to the enhanced layer MIMO signals; and a transmission signal generation unit for generating 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.

[0012] At this time, the above injection levels can be set to the same injection level.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] At this time, if phase hopping corresponding to the core layer is activated, phase hopping corresponding to the enhanced layer can be activated.

[0018] 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.

[0019] 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.

[0020] In addition, a broadcast signal transmission method according to an embodiment of the present invention includes the steps of: generating core layer MIMO signals and enhanced layer MIMO signals; hierarchically multiplexing the core layer MIMO signals and the enhanced layer MIMO signals to generate a first superposition signal corresponding to a first polarization and a second superposition signal corresponding to a second polarization; generating injection level signaling information regarding injection levels corresponding to the enhanced layer MIMO signals; and generating 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.

[0021] At this time, the above injection levels can be set to the same injection level.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] At this time, if phase hopping corresponding to the core layer is activated, phase hopping corresponding to the enhanced layer can be activated.

[0027] 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.

[0028] 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.

[0029] In addition, in one embodiment of the present invention, a broadcast signal receiving method includes: receiving a first polarization transmission signal including a first preamble corresponding to a first polarization and a second polarization transmission signal including a second preamble corresponding to a second polarization; restoring a core layer stream through MIMO decoding corresponding to the first polarization and the second polarization; generating core layer MIMO signals through MIMO BICM corresponding to the core layer stream; performing cancellation using the core layer MIMO signals to extract first polarization enhanced layer symbols and second polarization enhanced layer symbols; and restoring an enhanced stream using the first polarization enhanced layer symbols and the second polarization enhanced layer symbols.

[0030] At this time, the first preamble and the second preamble may include the same 5-bit injection level signaling information that is applied together for the first polarization and the second polarization.

[0031] At this time, the MIMO decoding is performed corresponding to MIMO encoding including MIMO precoding, and the MIMO precoding can be performed using one or more of stream combining, IQ polarization interleaving, and phase hopping.

[0032] At this time, the stream combining, IQ polarization interleaving and phase hopping correspond to the first MIMO field, the second MIMO field and the third MIMO field, respectively, and 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.

[0033] According to the present invention, when transmitting / receiving a broadcast signal using both hierarchical division multiplexing and MIMO technology, injection level information of hierarchical division multiplexing can be efficiently signaled.

[0034] In addition, the present invention can efficiently signal MIMO precoding signaling fields of MIMO when transmitting / receiving broadcast signals by using layered division multiplexing and MIMO technology together.

[0035] In addition, the present invention can efficiently signal signaling fields for layer division multiplexing and MIMO while preventing an increase in transmission / reception complexity when transmitting / receiving broadcast signals using layer division multiplexing and MIMO technology together.

[0036] Figure 1 is a block diagram showing an example of a broadcast signal transmission device using multiple transmission antennas and hierarchical division multiplexing.

[0037] FIG. 2 is a drawing showing a case where two different injection levels are used according to one embodiment of the present invention.

[0038] FIG. 3 is a diagram illustrating a case where two different injection levels are used according to another embodiment of the present invention.

[0039] FIG. 4 is a block diagram illustrating an example of a core layer MIMO precoder or an enhanced layer MIMO precoder illustrated in FIG. 1.

[0040] FIG. 5 is a block diagram of a broadcast signal receiving device to which MIMO and LDM are applied according to one embodiment of the present invention.

[0041] Fig. 6 is a block diagram showing another example of a broadcast signal transmission device using multiple transmission antennas and hierarchical division multiplexing.

[0042] FIG. 7 is a block diagram showing another example of a broadcast signal transmission device using multiple transmission antennas and hierarchical division multiplexing.

[0043] FIG. 8 is a block diagram of a broadcast signal receiving device to which MIMO and LDM are applied according to one embodiment of the present invention.

[0044] Fig. 9 is a block diagram showing a core layer broadcast signal receiving device when MIMO precoding is not applied to the core layer.

[0045] Fig. 10 is a block diagram showing an enhanced layer broadcast signal receiving device when MIMO precoding is not applied to the core layer.

[0046] Fig. 11 is a block diagram showing a broadcast signal transmission device when MIMO precoding is not applied to the core layer.

[0047] Figure 12 is a flowchart illustrating a broadcast signal transmission method according to one embodiment of the present invention.

[0048] Figure 13 is a flowchart illustrating a broadcast signal receiving method according to one embodiment of the present invention.

[0049] Figure 14 is a block diagram showing a computer system configuration according to one embodiment of the present invention.

[0050] 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.

[0051] Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the attached drawings.

[0052] Figure 1 is a block diagram showing an example of a broadcast signal transmission device using multiple transmission antennas and hierarchical division multiplexing.

[0053] Referring to FIG. 1, 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 (110), an enhanced layer MIMO signal generation unit (120), an LDM combining unit (130), an L1 signaling generation unit (140), and a transmission signal generation unit (150).

[0054] The core layer MIMO signal generation unit (110) generates core layer MIMO signals.

[0055] At this time, the core layer MIMO signal generation unit (110) may include a core layer FEC (Forward Error Correction) encoder (111), a core layer bit-interleaver (112), a core layer MIMO demux (DEMUX; Demultiplexer) (113), core layer symbol mappers (114, 115), and a core layer MIMO precoder (116).

[0056] The core layer FEC encoder (111) 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.

[0057] The core layer bit interleaver (112) can perform bit interleaving on FEC frames output from the core layer FEC encoder (111).

[0058] The core layer MIMO demux (113) and core layer symbol mappers (114, 115) can generate data cells for transmitting output to each of the multiple antennas for the output bit stream of the core layer bit-interleaver (112). That is, the core layer MIMO demux (113) 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 (113) can correspond 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 (114, 115) map the output of the core layer MIMO demux (113) 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 (114, 115) may be performed using various methods not illustrated.

[0059] Groups of two different data cells are input to a core layer MIMO precoder (116). At this time, the core layer MIMO precoder (116) 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).

[0060] At this time, the core layer MIMO precoder (116) 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 (116) illustrated in FIG. 1 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 (110), 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).

[0061] 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.

[0062] 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.

[0063] Hereinafter, the first antenna may be replaced with the first polarization, and the second antenna may be replaced with the second polarization.

[0064] The enhanced layer MIMO signal generation unit (120) generates enhanced layer MIMO signals.

[0065] At this time, the enhanced layer MIMO signal generation unit (120) may include an enhanced layer FEC (Forward Error Correction) encoder (121), an enhanced layer bit-interleaver (122), an enhanced layer MIMO demux (DEMUX; Demultiplexer) (123), enhanced layer symbol mappers (124, 125), and an enhanced layer MIMO precoder (126).

[0066] The enhanced layer FEC encoder (121) 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.

[0067] The enhanced layer bit-interleaver (122) can perform bit interleaving on FEC frames output from the enhanced layer FEC encoder (121).

[0068] The enhanced layer MIMO demux (123) and the enhanced layer symbol mappers (124, 125) can generate data cells for transmitting output to each of the multiple antennas for the output bit stream of the enhanced layer bit-interleaver (122). That is, the enhanced layer MIMO demux (123) 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 (123) 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 (124, 125) map the output of the enhanced layer MIMO demux (123) 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 (124, 125) may be performed using various methods not illustrated.

[0069] Groups of two different data cells are input to an enhanced layer MIMO precoder (126). At this time, the enhanced layer MIMO precoder (126) 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).

[0070] At this time, the enhanced layer MIMO precoder (126) 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 (126) illustrated in FIG. 1 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 (120), 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).

[0071] 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.

[0072] 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.

[0073] 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.

[0074] At this time, if phase hopping corresponding to the core layer is activated, phase hopping corresponding to the enhanced layer can be activated.

[0075] 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.

[0076] 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.

[0077] The LDM combiner (130) performs layered division multiplexing on the core layer MIMO signals and the enhanced layer MIMO signals to generate a first superposition signal corresponding to the first polarization and a second superposition signal corresponding to the second polarization.

[0078] At this time, the LDM coupling unit (130) may include injection level controllers (131, 132), couplers (133, 134) and power normalizers (135, 136).

[0079] 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 (131, 132) 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 (131), and the power of the enhanced layer MIMO signal for the second antenna (ANTENNA 2) is adjusted through the injection level controller (132).

[0080] Therefore, in the LDM coupling portion (130) illustrated in Fig. 1, two injection levels are used.

[0081] 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.

[0082] 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 (133), 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 (134).

[0083] The signal added through the coupler (133) is output as a first superposition signal through transmission power normalization by the power normalizer (135), and the signal added through the coupler (134) is output as a second superposition signal through transmission power normalization by the power normalizer (136).

[0084] The transmission signal generation unit (150) 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.

[0085] At this time, the transmission signal generation unit (150) includes framing & interleaving units (151, 152) and waveform generators (153, 154).

[0086] Time interleaving, frame generation (including preamble), and frequency interleaving can be performed in the framing & interleaving unit (151) on the first superposition signal output through the power normalizer (135). The output of the framing & interleaving unit (151) is input to the waveform generator (153) and output to the first antenna as the first polarization transmission signal.

[0087] Time interleaving, frame generation (including preamble), and frequency interleaving can be performed in the framing & interleaving unit (152) on the second superposition signal output through the power normalizer (136). The output of the framing & interleaving unit (152) is input to the waveform generator (154) and output to the second antenna as a second polarization transmission signal.

[0088] The framing & interleaving units (151, 152) 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 (151, 152) may or may not activate and perform time interleaving for each input data cell. At this time, the framing & interleaving units (151, 152) may each 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.

[0089] The grouped data cells, which are the outputs of the framing & interleaving units (151, 152), are input to the waveform generators (153, 154). At this time, the waveform generators (153, 154) can each perform an inverse fast Fourier transform (IFFT) after pilot insertion and insert a guard interval symbol. In addition, the waveform generators (153, 154) 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 (153, 154) can activate and apply the MISO (Multiple-Input Single-Output) signal processing function or can deactivate and not apply it.

[0090] The L1 signaling generation unit (140) can generate injection level signaling information regarding two injection levels corresponding to the enhanced layer MIMO signals.

[0091] 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 (131, 132) and also transmitted to and used by the power normalizers (135, 136). At this time, the power normalizers (135, 136) 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.

[0092] 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 (140), 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 (135, 136).

[0093] At this time, since there are two injection level controllers (131, 132), there are two injection levels used, and there are also two preambles generated from the framing & interleaving units (151, 152).

[0094] The injection levels of the injection level controllers (131, 132) may be set to the same injection level or may be set to different injection levels.

[0095] The first preamble generated by the framing & interleaving unit (151) and the second preamble generated by the framing & interleaving unit (152) may each include only the first injection level information (when the injection levels of the injection level controllers (131, 132) 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 (131, 132) 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.

[0096] 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.

[0097] 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.

[0098] 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). Table 1 below is a table showing L1-Detail signaling, and the L1-Detail signaling fields include the L1D_plp_ldm_injection_level field.

[0099] SyntaxNo. of BitsFormatL1_Detail_signaling() {L1D_version4uimsbfL1D_num_rf3uimsbffor (L1D_rf_id= 1 ..L1D_num_rf){L1D_bonded_bsid16uimsbfreserved3bslbf}if (L1B_time_info_flag!= 00){L1D_time_sec32uimsbfL1D_time_msec10uimsbfif (L1B_time_info_flag!= 01) {L1D_time_usec10uimsbfif (L1B_time_info_flag!= 10) {L1D_time_nsec10uimsbf}}}for (i=0 ..L1B_num_subframes) {if (i > 0){L1D_mimo1uimsbfL1D_miso2uimsbfL1D_fft_size2uimsbfL1D_reduced_carriers3uimsbfL1D_guard_interval4uimsbfL1D_num_ofdm_symbols11uimsbfL1D_scattered_pilot_pattern5uimsbfL1D_scattered_pilot_boost3uimsbfL1D_sbs_first1uimsbfL1D_sbs_last1uimsbf}if (L1B_num_subframes> 0) {L1D_subframe_multiplex1uimsbf}L1D_frequency_interleaver1uimsbfif (((i = 0) && (L1B_first_sub_sbs_first||L1B_first_sub_sbs_last)) ||((i > 0) && (L1D_sbs_first|L1D_sbs_last))) {L1D_sbs_null_cells13uimsbf}L1D_num_plp6uimsbffor (j=0 ..L1D_num_plp) {L1D_plp_id6uimsbfL1D_plp_lls_flag1uimsbfL1D_plp_layer2uimsbfL1D_plp_start24uimsbfL1D_plp_size24uimsbfL1D_plp_scrambler_type2uimsbfL1D_plp_fec_type4uimsbfif (L1D_plp_fec_type∈ {0,1,2,3,4,5}) {L1D_plp_mod4uimsbfL1D_plp_cod4uimsbf}L1D_plp_TI_mode2uimsbfif (L1D_plp_TI_mode= 00) {L1D_plp_fec_block_start15uimsbf} else if (L1D_plp_TI_mode= 01) {L1D_plp_CTI_fec_block_start}if(L1D_num_rf> 0) {L1D_plp_num_channel_bondedif (L1D_plp_num_channel_bonded> 0) {L1D_plp_channel_bonding_formatfor (k = 0 ..L1D_plp_num_channel_bonded) {L1D_plp_bonded_rf_id}}}if (i = 0 &&L1B_first_sub_mimo= 1) || (i >0 &&L1D_mimo= 1) {L1D_plp_mimo_stream_combiningL1D_plp_mimo_IQ_interleavingL1D_plp_mimo_PH}if (L1D_plp_layer= 0) {L1D_plp_type1uimsbfif (L1D_plp_type= 1) {L1D_plp_num_subslices14uimsbfL1D_plp_subslice_interval24uimsbf}if (((L1D_plp_TI_mode= 01) ||(L1D_plp_TI_mode= 10)) && (L1D_plp_mod= 0000)) {L1D_plp_TI_extended_interleaving1uimsbf}if (L1D_plp_TI_mode= 01) {L1D_plp_CTI_depth3uimsbfL1D_plp_CTI_start_row11uimsbf}else if (L1D_plp_TI_mode= 10) {L1D_plp_HTI_inter_subframe1uimsbfL1D_plp_HTI_num_ti_blocks4uimsbfL1D_plp_HTI_num_fec_blocks_max12uimsbfif (L1D_plp_HTI_inter_subframe= 0) {L1D_plp_HTI_num_fec_blocks12uimsbf}else {for (k = 0 ..L1D_plp_HTI_num_ti_blocks) {L1D_plp_HTI_num_fec_blocks12uimsbf}}L1D_plp_HTI_cell_interleaver1uimsbf}}else {L1D_plp_ldm_injection_level5uimsbf}}}L1D_bsid16uimsbfL1D_reservedas neededuimsbfL1D_crc32uimsbf}.

[0100] At this time, the injection level controllers (131, 132) and power normalizers (135, 136) illustrated in FIG. 1 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). 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 separate signaling field from the 5-bit injection level field (L1D_plp_ldm_injection_level) described in the example of Table 1 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). FIG. 2 is a diagram illustrating a case where two different injection levels are used according to one embodiment of the present invention.

[0101] Referring to FIG. 2, it can be seen that the injection level for the first antenna (polarization) (ANT1) is set corresponding to L1D_plp_ldm_injection_level, and the injection level for the second antenna (polarization) (ANT2) is set corresponding to L1D_plp_mimo_ldm_injection_level_ant2.

[0102] In this way, if the L1-Detail signaling fields of the preamble include two different injection level related signaling fields (L1D_plp_ldm_injection_level, L1D_plp_mimo_ldm_injection_level_ant2), the transmitter / receiver can freely use two different injection levels when layered division multiplexing is used with multiple transmit antennas.

[0103] Table 2 below shows the L1-Detail signaling fields, including newly defined and added injection level related signaling fields.

[0104] SyntaxNo. of BitsFormatL1_Detail_signaling() {L1D_version4uimsbfL1D_num_rf3uimsbffor (L1D_rf_id= 1 ..L1D_num_rf){L1D_bonded_bsid16uimsbfreserved3bslbf}if (L1B_time_info_flag!= 00){L1D_time_sec32uimsbfL1D_time_msec10uimsbfif (L1B_time_info_flag!= 01) {L1D_time_usec10uimsbfif (L1B_time_info_flag!= 10) {L1D_time_nsec10uimsbf}}}for (i=0 ..L1B_num_subframes) {if (i > 0){L1D_mimo1uimsbfL1D_miso2uimsbfL1D_fft_size2uimsbfL1D_reduced_carriers3uimsbfL1D_guard_interval4uimsbfL1D_num_ofdm_symbols11uimsbfL1D_scattered_pilot_pattern5uimsbfL1D_scattered_pilot_boost3uimsbfL1D_sbs_first1uimsbfL1D_sbs_last1uimsbf}if (L1B_num_subframes> 0) {L1D_subframe_multiplex1uimsbf}L1D_frequency_interleaver1uimsbfif (((i = 0) && (L1B_first_sub_sbs_first||L1B_first_sub_sbs_last)) ||((i > 0) && (L1D_sbs_first|L1D_sbs_last))) {L1D_sbs_null_cells13uimsbf}L1D_num_plp6uimsbffor (j=0 ..L1D_num_plp) {L1D_plp_id6uimsbfL1D_plp_lls_flag1uimsbfL1D_plp_layer2uimsbfL1D_plp_start24uimsbfL1D_plp_size24uimsbfL1D_plp_scrambler_type2uimsbfL1D_plp_fec_type4uimsbfif (L1D_plp_fec_type∈ {0,1,2,3,4,5}) {L1D_plp_mod4uimsbfL1D_plp_cod4uimsbf}L1D_plp_TI_mode2uimsbfif (L1D_plp_TI_mode= 00) {L1D_plp_fec_block_start15uimsbf} else if (L1D_plp_TI_mode= 01) {L1D_plp_CTI_fec_block_start}if(L1D_num_rf> 0) {L1D_plp_num_channel_bondedif (L1D_plp_num_channel_bonded> 0) {L1D_plp_channel_bonding_formatfor (k = 0 ..L1D_plp_num_channel_bonded) {L1D_plp_bonded_rf_id}}}if (i = 0 &&L1B_first_sub_mimo= 1) || (i >0 &&L1D_mimo= 1) {L1D_plp_mimo_stream_combiningL1D_plp_mimo_IQ_interleavingL1D_plp_mimo_PH}if (L1D_plp_layer= 0) {L1D_plp_type1uimsbfif (L1D_plp_type= 1) {L1D_plp_num_subslices14uimsbfL1D_plp_subslice_interval24uimsbf}if (((L1D_plp_TI_mode= 01) ||(L1D_plp_TI_mode= 10)) && (L1D_plp_mod= 0000)) {L1D_plp_TI_extended_interleaving1uimsbf}if (L1D_plp_TI_mode= 01) {L1D_plp_CTI_depth3uimsbfL1D_plp_CTI_start_row11uimsbf}else if (L1D_plp_TI_mode= 10) {L1D_plp_HTI_inter_subframe1uimsbfL1D_plp_HTI_num_ti_blocks4uimsbfL1D_plp_HTI_num_fec_blocks_max12uimsbfif (L1D_plp_HTI_inter_subframe= 0) {L1D_plp_HTI_num_fec_blocks12uimsbf}else {for (k = 0 ..L1D_plp_HTI_num_ti_blocks) {L1D_plp_HTI_num_fec_blocks12uimsbf}}L1D_plp_HTI_cell_interleaver1uimsbf}}else {L1D_plp_ldm_injection_level5uimsbf}}}L1D_bsid16uimsbffor (i = 0 ..L1B_num_subframes) {if (i = 0 &&L1B_first_sub_mimo= 1) || (i >0 &&L1D_mimo= 1) {for (j = 0 ..L1D_num_plp) {if (L1D_plp_layer> 0) {L1D_plp_mimo_ldm_injection_level_ant25uimsbf}}}}L1D_reservedas neededuimsbfL1D_crc32uimsbf}.

[0105] That is, the L1-Detail signaling fields described through Table 2 include a 5-bit L1D_plp_mimo_ldm_injection_level_ant2 field separately from a 5-bit L1D_plp_ldm_injection_level field, and the L1D_plp_ldm_injection_level field can be used for the first antenna (polarization), and the L1D_plp_mimo_ldm_injection_level_ant2 field can be used for the second antenna (polarization). The L1D_plp_mimo_ldm_injection_level_ant2 field for the second antenna (polarization) can have the same signaling format as the L1D_plp_ldm_injection_level field for the first antenna (polarization). Table 3 below shows the signaling format of the L1D_plp_mimo_ldm_injection_level_ant2 field.

[0106] ValueIL [dB]ValueIL [dB]000000.01000011.0000010.51000112.0000101.01001013.0000111.51001114 .0001002.01010015.0001012.51010116.0001103.01011017.0001113.51011118.0 010004.01100019.0010014.51100120.0010105.01101021.0010116.01101122.001 1007.01110023.0011018.01110124.0011109.01111025.00111110.011111Reserved

[0107] That is, the 5-bit L1D_plp_mimo_ldm_injection_level_ant2 field for the second antenna (polarization) is set to the same signaling format as the 5-bit L1D_plp_ldm_injection_level field for the first antenna (polarization) to signal an injection level from 0.0 dB to 25.0 dB. Depending on the embodiment, the injection level for the second antenna (polarization) may also be defined as a relative offset with respect to the injection level for the first antenna (polarization).

[0108] FIG. 3 is a diagram illustrating a case where two different injection levels are used according to another embodiment of the present invention.

[0109] Referring to FIG. 3, it can be seen that the injection level for the first antenna (polarization) (ANT1) is set corresponding to L1D_plp_ldm_injection_level, and the injection level for the second antenna (polarization) (ANT2) is set corresponding to a relative offset (△IL, IL Offset) with respect to the first antenna (polarization) (ANT1). At this time, the injection level of the enhanced layer for the second antenna (polarization) (ANT2) can be determined by adding the values ​​corresponding to L1D_plp_ldm_injection_level and a new signaling field, L1D_plp_mimo_ldm_injection_level_ant_offset.

[0110] In this way, if the L1-Detail signaling fields of the preamble include two different injection level related signaling fields (L1D_plp_ldm_injection_level, L1D_plp_mimo_ldm_injection_level_ant_offset), the transmitter / receiver can freely use two different injection levels when layered division multiplexing is used with multiple transmit antennas.

[0111] Table 4 below shows the L1-Detail signaling fields, including newly defined and added injection level related signaling fields.

[0112] SyntaxNo. of BitsFormatL1_Detail_signaling() {L1D_version4uimsbfL1D_num_rf3uimsbffor (L1D_rf_id= 1 ..L1D_num_rf){L1D_bonded_bsid16uimsbfreserved3bslbf}if (L1B_time_info_flag!= 00){L1D_time_sec32uimsbfL1D_time_msec10uimsbfif (L1B_time_info_flag!= 01) {L1D_time_usec10uimsbfif (L1B_time_info_flag!= 10) {L1D_time_nsec10uimsbf}}}for (i=0 ..L1B_num_subframes) {if (i > 0){L1D_mimo1uimsbfL1D_miso2uimsbfL1D_fft_size2uimsbfL1D_reduced_carriers3uimsbfL1D_guard_interval4uimsbfL1D_num_ofdm_symbols11uimsbfL1D_scattered_pilot_pattern5uimsbfL1D_scattered_pilot_boost3uimsbfL1D_sbs_first1uimsbfL1D_sbs_last1uimsbf}if (L1B_num_subframes> 0) {L1D_subframe_multiplex1uimsbf}L1D_frequency_interleaver1uimsbfif (((i = 0) && (L1B_first_sub_sbs_first||L1B_first_sub_sbs_last)) ||((i > 0) && (L1D_sbs_first|L1D_sbs_last))) {L1D_sbs_null_cells13uimsbf}L1D_num_plp6uimsbffor (j=0 ..L1D_num_plp) {L1D_plp_id6uimsbfL1D_plp_lls_flag1uimsbfL1D_plp_layer2uimsbfL1D_plp_start24uimsbfL1D_plp_size24uimsbfL1D_plp_scrambler_type2uimsbfL1D_plp_fec_type4uimsbfif (L1D_plp_fec_type∈ {0,1,2,3,4,5}) {L1D_plp_mod4uimsbfL1D_plp_cod4uimsbf}L1D_plp_TI_mode2uimsbfif (L1D_plp_TI_mode= 00) {L1D_plp_fec_block_start15uimsbf} else if (L1D_plp_TI_mode= 01) {L1D_plp_CTI_fec_block_start22uimsbf}if(L1D_num_rf> 0) {L1D_plp_num_channel_bonded3uimsbfif (L1D_plp_num_channel_bonded> 0) {L1D_plp_channel_bonding_format2uimsbffor (k = 0 ..L1D_plp_num_channel_bonded) {L1D_plp_bonded_rf_id3uimsbf}}}if (i = 0 &&L1B_first_sub_mimo= 1) || (i >0 &&L1D_mimo= 1) {L1D_plp_mimo_stream_combining1uimsbfL1D_plp_mimo_IQ_interleaving1uimsbfL1D_plp_mimo_PH1uimsbf}if (L1D_plp_layer= 0) {L1D_plp_type1uimsbfif (L1D_plp_type= 1) {L1D_plp_num_subslices14uimsbfL1D_plp_subslice_interval24uimsbf}if (((L1D_plp_TI_mode= 01) ||(L1D_plp_TI_mode= 10)) && (L1D_plp_mod= 0000)) {L1D_plp_TI_extended_interleaving1uimsbf}if (L1D_plp_TI_mode= 01) {L1D_plp_CTI_depth3uimsbfL1D_plp_CTI_start_row11uimsbf}else if (L1D_plp_TI_mode= 10) {L1D_plp_HTI_inter_subframe1uimsbfL1D_plp_HTI_num_ti_blocks4uimsbfL1D_plp_HTI_num_fec_blocks_max12uimsbfif (L1D_plp_HTI_inter_subframe= 0) {L1D_plp_HTI_num_fec_blocks12uimsbf}else {for (k = 0 ..L1D_plp_HTI_num_ti_blocks) {L1D_plp_HTI_num_fec_blocks12uimsbf}}L1D_plp_HTI_cell_interleaver1uimsbf}}else {L1D_plp_ldm_injection_level5uimsbf}}}L1D_bsid16uimsbffor (i = 0 ..L1B_num_subframes) {if (i = 0 &&L1B_first_sub_mimo= 1) || (i >0 &&L1D_mimo= 1) {for (j = 0 ..L1D_num_plp) {if (L1D_plp_layer> 0) {L1D_plp_mimo_ldm_injection_level_ant_offsetN_offsetuimsbf}}}}L1D_reservedas neededuimsbfL1D_crc32uimsbf}.

[0113] That is, the L1-Detail signaling fields described through Table 4 include the L1D_plp_mimo_ldm_injection_level_ant_offset field separately from the 5-bit L1D_plp_ldm_injection_level field, and the L1D_plp_ldm_injection_level field may be used for the first antenna (polarization), and the L1D_plp_mimo_ldm_injection_level_ant_offset field may be used for the second antenna (polarization). The L1D_plp_mimo_ldm_injection_level_ant_offset field for the second antenna (polarization) may have a signaling format for indicating a relative offset value with respect to the value indicated by the L1D_plp_ldm_injection_level field for the first antenna (polarization). At this time, the injection level for the second antenna (polarization) may be greater or less than the injection level for the first antenna (polarization). Therefore, the injection level offset value indicated by L1D_plp_mimo_ldm_injection_level_ant_offset for the second antenna (polarization) may include both positive and negative numbers.

[0114] At this time, the combination of L1D_plp_ldm_injection_level and L1D_plp_mimo_ldm_injetion_level_ant_offset can be limited so that the injection level of the enhanced layer for the second antenna (polarization) induced by the combination of L1D_plp_ldm_injection_level and L1D_plp_mimo_ldm_injetion_level_ant_offset can only take values ​​within a specified range. For example, if the injection level of the enhanced layer for the second antenna / polarization is limited to be defined only within the range of 0.0 dB to 25.0 dB, similar to the injection level of the enhanced layer for the first antenna (polarization), when the injection level of the enhanced layer for the first antenna (polarization) corresponding to L1D_plp_ldm_injection_level is 13.0 dB, a signaling value indicating a value exceeding 12.0 dB among L1D_plp_mimo_ldm_injection_level_ant_offset may not be selected.

[0115] In Table 4 above, N_offset bits can be allocated to L1D_plp_mimo_ldm_injection_level_ant_offset.

[0116] Table 5 below shows an example of a signaling format when N_offset is 6 bits.

[0117] ValueIL [dB]ValueIL [dB]0000000.0100001-0.50000010.5100010-1.00000101.0100011-1.50000111.5100100-2.000 01002.0100101-2.50001012.5100110-3.00001103.0100111-3.50001113.5101000-4.00010004. 0101001-4.50010014.5101010-5.00010105.0101011-6.00010116.0101100-7.00011007.0101101-8.00011018.0101110-9.00011109.0101111-10.000111110.0110000-11.001000011.0110001- 12.001000112.0110010-13.001001013.0110011-14.001001114.0110100-15.001010015.0110101-16.001010116.0110110-17.001011017.0110111-18.001011118.0111000-19.001100019.0111 001-20.001100120.0111010-21.001101021.0111011-22.001101122.0111100-23.001110023.01 11101-24.001110124.0111110-25.001111025.0111111Reserved011111Reserved100000Reserved

[0118] In Table 5, a new signaling field L1D_plp_mimo_ldm_injection_level_ant_offset for the second antenna (polarization) is set to a 6-bit value, which can signal injection level offset values ​​from -25.0 dB to +25.0 dB. Table 6 below shows an example of a signaling format when N_offset is 5 bits.

[0119] ValueIL [dB]ValueIL [dB]000000.01000011.0000010.510001-0.5000101.010010-1.0000111.510011- 1.5001002.010100-2.0001012.510101-2.5001103.010110-3.0001113.510111-3. 5010004.011000-4.0010014.511001-4.5010105.011010-5.0010116.011011-6.0011007.011100-7.0011018.011101-8.0011109.011110-9.00111110.011111-10.0

[0120] In Table 6, a new signaling field L1D_plp_mimo_ldm_injection_level_ant_offset for the second antenna (polarization) is set to a 5-bit value, which can signal injection level offset values ​​from -10.0 dB to +11.0 dB. Table 7 below shows an example of a signaling format when N_offset is 4 bits.

[0121] ValueIL [dB]ValueIL [dB]00000.0100015.000011.01001-1.000103.01010-3.000115.01011-5.0 01007.01100-7.001019.01101-9.0011011.01110-11.0011113.01111-13.0

[0122] In Table 7, a new signaling field L1D_plp_mimo_ldm_injection_level_ant_offset for the second antenna (polarization) is set to a 4-bit value, which can signal injection level offset values ​​from -13.0 dB to +15.0 dB. Table 8 below shows an example of a signaling format when N_offset is 3 bits.

[0123] ValueIL [dB]ValueIL [dB]0000.010015.00013.0101-3.00105.0110-5.001110.0111-10.0

[0124] In Table 8, a new signaling field L1D_plp_mimo_ldm_injection_level_ant_offset for the second antenna (polarization) is set to a 3-bit value, which can signal injection level offset values ​​from -10.0 dB to +15.0 dB. Table 9 below shows an example of a signaling format when N_offset is 2 bits.

[0125] ValueIL [dB]ValueIL [dB]000.0105.0013.011-3.0

[0126] In Table 9, a new signaling field L1D_plp_mimo_ldm_injection_level_ant_offset for the second antenna (polarization) is set to a 2-bit value to signal injection level offset values ​​from -3.0 dB to +5.0 dB. As described above, the present invention can efficiently signal injection level information of layer division multiplexing when transmitting / receiving broadcast signals using layer division multiplexing and MIMO technology together, and thus can improve the performance of a terrestrial broadcasting system.

[0127] FIG. 4 is a block diagram illustrating an example of a core layer MIMO precoder or an enhanced layer MIMO precoder illustrated in FIG. 1.

[0128] Referring to FIG. 4, the core layer MIMO precoder (116) (or enhanced layer MIMO precoder (126)) illustrated in FIG. 1 includes a stream combiner (410), an IQ polarization interleaving unit (420), and a phase hopping unit (430).

[0129] The stream combining unit (410) can combine two data cells coming in as input and output them.

[0130] The IQ polarization interleaving unit (420) can output the quadrature components of two data cells input by exchanging them with each other.

[0131] The phase hopping unit (430) can change the phase of data cells coming in as input and output them.

[0132] At this time, the stream combining unit (410), the IQ polarization interleaving unit (420), and the phase hopping unit (430) 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 (410), the IQ polarization interleaving unit (420), and the phase hopping unit (430), the stream combining unit (410), the IQ polarization interleaving unit (420), and the phase hopping unit (430) may output different signals or the same signals, respectively.

[0133] At this time, the MIMO setting of the core layer MIMO precoder (116) (or, the enhanced layer MIMO precoder (126)) may correspond to the first MIMO field (L1D_plp_mimo_stream_combining), the second MIMO field (L1D_plp_mimo_IQ_interleaving) and the third MIMO field (L1D_plp_mimo_PH) corresponding to MIMO precoding. At this time, the first MIMO field, the second MIMO field and the third MIMO field may all be 1-bit fields. At this time, the first MIMO field is a field corresponding to activation / deactivation of the stream combining unit (410) of FIG. 4, the second MIMO field is a field corresponding to activation / deactivation of the IQ polarization interleaving unit (420), and the third MIMO field is a field corresponding to phase It may be a field corresponding to activation / deactivation of the hopping unit (430).

[0134] At this time, the first MIMO field (L1D_plp_mimo_stream_combining), the second MIMO field (L1D_plp_mimo_IQ_interleaving), and the third MIMO field (L1D_plp_mimo_PH) may be included in the L1-Detail signaling fields and transmitted to the receiver, and these fields are all included in the examples of Table 1, Table 2, and Table 4 described above.

[0135] At this time, the first MIMO field (L1D_plp_mimo_stream_combining), the second MIMO field (L1D_plp_mimo_IQ_interleaving), and the third MIMO field (L1D_plp_mimo_PH) may be MIMO signaling information separately set for each of core layer MIMO precoding and enhanced layer MIMO precoding, and may be set or generated by the L1 signaling generation unit (140) illustrated in FIG. 1.

[0136] At this time, the first MIMO field (L1D_plp_mimo_stream_combining), the second MIMO field (L1D_plp_mimo_IQ_interleaving), and the third MIMO field (L1D_plp_mimo_PH) may be set to '1' when the corresponding block is activated, and may be set to '0' when the corresponding block is deactivated.

[0137] As described above, the broadcast signal transmission system of FIG. 1 includes two MIMO precoders (a core layer MIMO precoder and an enhanced layer MIMO precoder), and these two precoders may operate independently of each other through different MIMO settings.

[0138] In some embodiments, in order to efficiently implement a transmitter / receiver and efficiently transmit / receive signaling information when multiple transmit antennas and layer division multiplexing are applied together, the core layer and the enhanced layer may share a MIMO precoding configuration. In this case, in case multiple transmit antennas and layer division multiplexing are applied together, the use of MIMO precoding may be disallowed. In this case, the use of MIMO precoding may be disallowed when the above-mentioned first MIMO field, second MIMO field, and third MIMO field are all set to '0', so that the stream combining unit, the IQ polarization interleaving unit, and the phase hopping unit are all deactivated.

[0139] In this case, when multiple transmit antennas and layered division multiplexing are applied together, the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the enhanced layer may be identical to the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the core layer. In this way, if the core layer and the enhanced layer use completely identical MIMO settings, the transmission / reception complexity can be reduced.

[0140] In some embodiments, when multiple transmit antennas and layered division multiplexing are applied together, the combination of the first MIMO field, the second MIMO field, and the third MIMO field of a specific layer (core layer or enhanced layer) may be determined based on the combination of the first MIMO field, the second MIMO field, and the third MIMO field of another layer (enhanced layer or core layer).

[0141] At this time, the first MIMO field, the second MIMO field, and the third MIMO field may have priorities. For example, the priorities may be in the order of the third MIMO field (L1D_plp_mimo_PH), the second MIMO field (L1D_plp_mimo_IQ_interleaving), and the first MIMO field (L1D_plp_mimo_stream_combining). That is, the phase hopping unit may have the highest priority, the IQ polarization interleaving unit may be next in priority, and the stream combining unit may have the lowest priority. Depending on the embodiment, the priorities may be determined in reverse.

[0142] At this time, the combination of the first MIMO field, the second MIMO field, and the third MIMO field can be expressed in a format such as (0, 0, 0) (all three disabled), (1, 1, 1) (all three enabled), or (1, 0, 0) (only the first MIMO field enabled).

[0143] Table 10 below shows an example in which a combination of the first MIMO field, the second MIMO field, and the third MIMO field of the corresponding layer is determined based on a combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer.

[0144] Reference Layer (subset)Corresponding Layer (mother set)(L1D_plp_mimo_stream_combining, L1D_plp_mimo_IQ_interleaving, L1D_plp_mimo_PH)(0, 0, 0)All Combinations(0, 0, 1)(0, 0, 1), (0, 1, 1), (1, 0, 1), (1, 1, 1)(0, 1, 0)(0, 1, 0), (1, 1, 0)(0, 1, 1)(0, 1, 1), (1, 1, 1)(1, 0, 0)(1, 0, 0)(1, 0, 1)(1, 0, 1)(1, 1, 0)(1, 1, 0)(1, 1, 1)(1, 1, 1)

[0145] In Table 10, the reference layer may be a core layer, and the corresponding layer may be an enhanced layer. Conversely, the reference layer may be an enhanced layer, and the corresponding layer may be a core layer. In the example of Table 10, when the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer is (0, 0, 0), since all three functional blocks of the MIMO precoder for the reference layer (stream combining unit, IQ polarization interleaving unit, and phase hopping unit) are disabled, the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the corresponding layer can be freely determined. In this case, since there is no activated field in the reference layer, all fields of the corresponding layer can be freely determined.

[0146] When the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer is (0, 0, 1), among the three functional blocks (stream combining unit, IQ polarization interleaving unit, and phase hopping unit) of the MIMO precoder for the reference layer, only the phase hopping unit corresponding to the third MIMO field is activated, so only the third MIMO field of the corresponding layer is set identically to the third MIMO field of the reference layer, and the combination of the remaining first MIMO fields and the second MIMO fields can be freely determined. In this case, since only the third MIMO field of the reference layer without a subsequent field is activated, the corresponding layer activates only the third MIMO field according to the reference layer, and the remaining first MIMO fields and the second MIMO fields can be freely determined.

[0147] When the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer is (0, 1, 0), among the three functional blocks of the MIMO precoder for the reference layer (stream combining unit, IQ polarization interleaving unit, and phase hopping unit), only the IQ polarization interleaving unit corresponding to the second MIMO field is activated, so the combination (1, 0) of the second MIMO field of the corresponding layer and the third MIMO field subsequent to the second MIMO field is set to be the same as the combination of the second MIMO field and the third MIMO field of the reference layer, and the remaining first MIMO fields can be freely determined. In this case, since the second MIMO field of the reference layer with the subsequent third MIMO field is activated, the corresponding layer sets not only the second MIMO field but also the third MIMO field subsequent to the second MIMO field to be the same as that of the reference layer, and only the remaining first MIMO fields can be freely determined.

[0148] When the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer is (0, 1, 1), among the three functional blocks (stream combining unit, IQ polarization interleaving unit, and phase hopping unit) of the MIMO precoder for the reference layer, only the IQ polarization interleaving unit corresponding to the second MIMO field is activated, so the combination (1, 1) of the second MIMO field of the corresponding layer and the third MIMO field subsequent to the second MIMO field is set to be the same as the combination of the second MIMO field and the third MIMO field of the reference layer, and the remaining first MIMO fields can be freely determined. In this case, since the second MIMO field of the reference layer with the subsequent third MIMO field is activated, the corresponding layer sets not only the second MIMO field but also the third MIMO field subsequent to the second MIMO field to be the same as that of the reference layer, and only the remaining first MIMO fields can be freely determined.

[0149] When the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer is (1, 0, 0), among the three functional blocks (stream combining unit, IQ polarization interleaving unit, and phase hopping unit) of the MIMO precoder for the reference layer, only the stream combining unit corresponding to the first MIMO field is activated, so the combination (1, 0, 0) of the first MIMO field of the corresponding layer, the second and third MIMO fields following the first MIMO field can be set to be the same as the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer. In this case, since the first MIMO field of the reference layer with the subsequent second MIMO field and the third MIMO field is activated, the corresponding layer can set not only the first MIMO field but also the second MIMO field and the third MIMO field following the first MIMO field to be identical to the reference layer.

[0150] When the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer is (1, 0, 1), since the stream combining unit corresponding to the first MIMO field among the three functional blocks (stream combining unit, IQ polarization interleaving unit, and phase hopping unit) of the MIMO precoder for the reference layer is activated, the combination (1, 0, 1) of the first MIMO field of the corresponding layer, the second and third MIMO fields following the first MIMO field can be set to be the same as the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer. In this case, since the first MIMO field of the reference layer with the subsequent second MIMO field and the third MIMO field is activated, the corresponding layer can set not only the first MIMO field but also the second MIMO field and the third MIMO field following the first MIMO field to be identical to the reference layer.

[0151] When the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer is (1, 1, 0), since the stream combining unit corresponding to the first MIMO field among the three functional blocks (stream combining unit, IQ polarization interleaving unit, and phase hopping unit) of the MIMO precoder for the reference layer is activated, the combination (1, 1, 0) of the first MIMO field of the corresponding layer, the second and third MIMO fields following the first MIMO field can be set to be the same as the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer. In this case, since the first MIMO field of the reference layer with the subsequent second MIMO field and the third MIMO field is activated, the corresponding layer can set not only the first MIMO field but also the second MIMO field and the third MIMO field following the first MIMO field to be identical to the reference layer.

[0152] When the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer is (1, 1, 1), since the stream combining unit corresponding to the first MIMO field among the three functional blocks (stream combining unit, IQ polarization interleaving unit, and phase hopping unit) of the MIMO precoder for the reference layer is activated, the combination (1, 1, 1) of the first MIMO field of the corresponding layer, the second and third MIMO fields following the first MIMO field can be set to be the same as the combination of the first MIMO field, the second MIMO field, and the third MIMO field of the reference layer. In this case, since the first MIMO field of the reference layer with the subsequent second MIMO field and the third MIMO field is activated, the corresponding layer can set not only the first MIMO field but also the second MIMO field and the third MIMO field following the first MIMO field to be identical to the reference layer.

[0153] In the example described through Table 10, among the three functional blocks of MIMO precoding, only some functional blocks are set identically between the reference layer and the corresponding layer. In particular, in the example of Table 10, when the second MIMO field of the reference layer is activated, it can be seen that two fields (the second MIMO field and the third MIMO field) among the first MIMO field, the second MIMO field, and the third MIMO field are set identically in the two layers.

[0154] In some embodiments, when multiple transmit antennas and layered division multiplexing are applied together, the core layer and the enhanced layer may set at least one of the three MIMO fields to be identical to optimize transmission / reception efficiency. That is, at this time, the core layer and the enhanced layer may use the same mode / value for at least one or more of the three MIMO precoding function blocks.

[0155] That is, some or all of the stream combining section, IQ polarization interleaving section, and phase hopping section of the core layer may be set to be the same as some or all of the stream combining section, IQ polarization interleaving section, and phase hopping section of the enhanced layer.

[0156] In a system where MIMO and LDM are applied together, when different precodings are applied to the core layer and the enhanced layer, the receiver receiving the enhanced layer must perform the following process to cancel the core layer signal (LDM cancellation).

[0157] 1) After performing the reverse process of core layer MIMO precoding, the core layer signal is decoded, 2) the core layer signal is re-modulated and core layer MIMO precoding is performed again, 3) the re-modulated and re-precoded core layer signal is removed from the received signal stored in the LDM buffer, and 4) the reverse process of enhanced MIMO precoding is performed on the remaining signal components and demodulation / decoding is performed. These processes are described in detail in FIG. 24 of Korean Patent Publication No. 10-2018-0132525.

[0158] The signal processing process described above excessively increases the computational complexity of the receiver because it must perform the reverse process of core layer MIMO precoding, re-perform core layer MIMO precoding, and perform the reverse process of enhanced layer MIMO precoding.

[0159] When the same precoding configuration is applied to the core layer and the enhanced layer, the reception process can be performed more efficiently because the core layer and the enhanced layer undergo common precoding.

[0160] FIG. 5 is a block diagram of a broadcast signal receiving device to which MIMO and LDM are applied according to one embodiment of the present invention.

[0161] Referring to FIG. 5, the broadcast signal receiving device includes RF receivers (511, 512), channel estimation units (521, 522), a channel equalizer (503), frequency deinterleavers (531, 532), time deinterleavers (541, 542), a MIMO decoder (505), a core layer BICM decoder (550), a core layer BICM unit (560), LDM buffers (571, 572), an LDM cancellation unit (580), and an enhanced layer BICM decoder (590).

[0162] The broadcast signal receiving device illustrated in Fig. 5 can receive an LDMed broadcast signal and restore a core layer signal and an enhanced layer signal.

[0163] RF receivers (511, 512) receive signals transmitted through two antennas and generate reception signals.

[0164] Channel estimation units (521, 522) estimate the channel between the receiving antennas and the transmitting antennas.

[0165] The channel equalizer (503) performs channel equalization. That is, the channel equalizer (503) corrects distortion caused by multipath propagation, frequency selective fading, bandwidth limitation, etc. of a signal transmitted through a channel to restore the original signal.

[0166] Frequency deinterleavers (531, 532) and time deinterleavers (541, 542) perform frequency and time deinterleaving operations for the horizontally polarized antenna (first antenna or first polarization) and the vertically polarized antenna (second antenna or second polarization), respectively.

[0167] The MIMO decoder (505) performs the reverse process of MIMO precoding before LDM cancellation.

[0168] The core layer BICM decoder (550) performs the reverse process of the core layer BICM part of the transmitter. At this time, unlike the receiver of FIG. 24 of Korean Patent Publication No. 10-2018-0132525, the core layer BICM decoder (550) does not need a separate MIMO decoder. That is, the output of the MIMO decoder (505) is input as is to the MIMO demapper of the core layer BICM decoder (550).

[0169] In the example shown in FIG. 5, the core layer BICM decoder (550) decodes the MIMO decoded result based on the two antenna signals to the MIMO demapper (MIMO MAP). -1 ) and MIMO multiplexes the demodulated result into one stream, and then bit-deinterleaves and FEC decodes the result to generate a core layer signal.

[0170] The core layer BICM unit (560) performs BICM again on the restored core layer stream, including a MIMO demultiplexer (MIMO DEMUX), divides the channel-coded and bit-interleaved bit string into two substreams, and modulates each of the substreams. At this time, the modulation of the substreams may be performed by two modulators or may be performed by sharing one modulator. At this time, the core layer BICM unit (560) does not need to be equipped with a separate MIMO precoder (CL MIMO PRECODER), and therefore, the two output signals of the core layer BICM unit (560) are output as is to the LDM cancellation unit (580).

[0171] Cancellation corresponding to the core layer is performed through two LDM buffers (571, 572) and an LDM cancellation unit (580). At this time, the cancellation corresponds to the core layer signal and can be performed separately for each receiving antenna.

[0172] The signal for which cancellation corresponding to the core layer has been performed is restored as an enhanced layer output stream through the enhanced layer BICM decoder (590). At this time, the enhanced layer BICM decoder (590) can restore the enhanced layer signal using all cancellation signals. At this time, unlike the receiver of FIG. 24 of Korean Patent Publication No. 10-2018-0132525, the enhanced layer BICM decoder (590) does not need to be equipped with a separate MIMO decoder. That is, the output of the LDM cancellation unit (580) is input as is to the MIMO demapper of the enhanced layer BICM decoder (590).

[0173] The enhanced layer BICM decoder (590) receives cancellation signals, demodulates them by a MIMO demapper (MIMO MAP-1), MIMO multiplexes the demodulated results into one stream, and then bit-deinterleaves and FEC decodes the results to generate an enhanced layer signal.

[0174] In Fig. 5, BIL represents Bit-Interleaver, and BIL -1 stands for Bit-Deinterleaver, FEC stands for Forward Error Correction Coding (Channel Encoding), and FEC -1 represents Channel Decoding, TI represents Time-Interleaver, and TI -1 stands for Time-Deinterleaver, FI stands for Frequency Interleaver, and FI -1 stands for Frequency Deinterleaver.

[0175] In the example of FIG. 5, the broadcast signal receiver performs LDM cancellation on a signal after the reverse process of MIMO precoding (MIMO decoding), thereby omitting blocks that perform the reverse process of core layer MIMO precoding and the reverse process of enhanced layer MIMO precoding while maintaining the same amount of memory required for the LDM buffer, thereby significantly reducing the computational amount of the receiver. This can provide a reduction in computational complexity, computational time, power consumption, and computational memory of the receiver.

[0176] By matching the MIMO precoding schemes of the core layer and the enhanced layer, efficiency can be improved not only in the receiver but also in the transmitter implementation.

[0177] Fig. 6 is a block diagram showing another example of a broadcast signal transmission device using multiple transmission antennas and hierarchical division multiplexing.

[0178] Referring to FIG. 6, a broadcast signal transmission device using multiple transmission antennas and layered division multiplexing according to an embodiment of the present invention includes a core layer MIMO signal generation unit (610), an enhanced layer MIMO signal generation unit (620), injection level controllers (131, 132), combiners (133, 134), power normalizers (135, 136), a MIMO precoder (630), framing & interleaving units (151, 152), and waveform generators (153, 154).

[0179] The receiver structure illustrated in FIG. 6, compared to the structure illustrated in FIG. 1, has a core layer MIMO signal generation unit (610) and an enhanced layer MIMO signal generation unit (620) that do not each have a MIMO precoder, but have one MIMO precoder (630) that performs MIMO precoding after LDM combining.

[0180] That is, the receiver illustrated in FIG. 6 applies MIMO precoding only once to a signal obtained by LDM combining the core layer and the enhanced layer, rather than applying MIMO precoding to each of the core layer and the enhanced layer and then LDM combining them, so that the transmitter computational complexity can be reduced compared to the receiver illustrated in FIG. 1.

[0181] FIG. 7 is a block diagram showing another example of a broadcast signal transmission device using multiple transmission antennas and hierarchical division multiplexing.

[0182] Referring to FIG. 7, a broadcast signal transmission device using multiple transmission antennas and layered division multiplexing according to an embodiment of the present invention includes a core layer MIMO signal generation unit (610), an enhanced layer MIMO signal generation unit (620), injection level controllers (131, 132), combiners (133, 134), a MIMO precoder (730), power normalizers (135, 136), framing & interleaving units (151, 152), and waveform generators (153, 154).

[0183] The receiver structure illustrated in FIG. 6 is compared to the structure illustrated in FIG. 6 in that only the position of the MIMO precoder (730) has been changed from after power normalization to before.

[0184] That is, in order for the core layer and the enhanced layer to share MIMO precoding, MIMO precoding may be applied to the combined signal of the core layer and the enhanced layer after passing through the power normalizer as shown in FIG. 6, or MIMO precoding may be applied before passing through the power normalizer as shown in FIG. 7.

[0185] The simplification of signal processing in the broadcast signal transmission / reception process described above can be applied in a similar manner even when only some of the three processes of stream combining, IQ polarization interleaving, and phase hopping during the MIMO precoding process are shared between the core layer and the enhanced layer.

[0186] That is, when MIMO and LDM (Layered Division Multiplexing) are applied together as described above, MIMO can be applied to both the core layer and the enhanced layer. In this case, both the core layer physical layer pipes (PLPs) and the enhanced layer physical layer pipes can perform the MIMO precoding process.

[0187] To reduce receiver complexity, a broadcast signal transmitter that applies MIMO to both the core layer and the enhanced layer may apply the same IQ polarization interleaving and phase hopping parameters (second MIMO field and third MIMO field) to the enhanced layer physical layer pipe(s) as to the core layer physical layer pipe(s).

[0188] That is, if a core layer physical layer pipe enables IQ polarization interleaving, the associated enhanced layer physical layer pipe(s) may need to enable IQ polarization interleaving. Similarly, if an enhanced layer physical layer pipe enables IQ polarization interleaving, the associated core layer physical layer pipe(s) may need to enable IQ polarization interleaving.

[0189] Additionally, if a core layer physical layer pipe enables phase hopping, the associated enhanced layer physical layer pipe(s) may need to enable phase hopping. Similarly, if an enhanced layer physical layer pipe enables phase hopping, the associated core layer physical layer pipe(s) may need to enable phase hopping.

[0190] In a system where MIMO and LDM are applied together, the fact that the core layer and the enhanced layer use the same MIMO precoding configuration may include cases where MIMO precoding is not applied to both the core layer and the enhanced layer.

[0191] FIG. 8 is a block diagram of a broadcast signal receiving device to which MIMO and LDM are applied according to one embodiment of the present invention.

[0192] Referring to FIG. 8, the broadcast signal receiving device includes RF receivers (511, 512), channel estimation units (521, 522), a channel equalizer (503), frequency deinterleavers (531, 532), time deinterleavers (541, 542), a core layer BICM decoder (550), a core layer BICM unit (560), LDM buffers (571, 572), an LDM cancellation unit (580), and an enhanced layer BICM decoder (590).

[0193] That is, the broadcast signal receiving device illustrated in FIG. 8 does not require a MIMO decoder because neither the core layer nor the enhanced layer uses MIMO precoding.

[0194] Depending on the embodiment, in a system where MIMO and LDM are applied together, MIMO precoding may not be applied to the core layer, but MIMO precoding may be applied to the enhanced layer.

[0195] That is, depending on the application, in a system where MIMO and LDM are applied together, a lighter receiving terminal than an enhanced layer receiver, such as a mobile terminal that supports MIMO reception, may be considered for reception of the core layer.

[0196] Fig. 9 is a block diagram showing a core layer broadcast signal receiving device when MIMO precoding is not applied to the core layer.

[0197] Referring to FIG. 9, the core layer broadcast signal receiving device includes RF receivers (511, 512), channel estimation units (521, 522), a channel equalizer (503), frequency deinterleavers (531, 532), time deinterleavers (541, 542), and a core layer BICM decoder (550).

[0198] The broadcast signal receiving device illustrated in Fig. 9 does not need to perform the reverse process of MIMO precoding because the core layer does not use MIMO precoding, and therefore, a MIMO decoder is unnecessary.

[0199] Fig. 10 is a block diagram showing an enhanced layer broadcast signal receiving device when MIMO precoding is not applied to the core layer.

[0200] Referring to FIG. 10, the enhanced layer broadcast signal receiving device includes RF receivers (511, 512), channel estimation units (521, 522), a channel equalizer (503), frequency deinterleavers (531, 532), time deinterleavers (541, 542), a core layer BICM decoder (550), a core layer BICM unit (560), LDM buffers (571, 572), an LDM cancellation unit (580), and an enhanced layer BICM decoder (1090).

[0201] The configurations of the broadcast signal receiving device illustrated in FIG. 10 have already been described through FIG. 8, and differ from the enhanced layer BICM decoder (590) illustrated in FIG. 8 in that only the enhanced layer BICM decoder (1090) illustrated in FIG. 10 has a MIMO decoder (1091) for performing the reverse process of MIMO precoding for the enhanced layer.

[0202] That is, in a system where MIMO and LDM are applied together, if MIMO precoding is not applied to the core layer and MIMO precoding is applied to the enhanced layer, the enhanced layer broadcast signal receiving device only needs to perform the reverse process of MIMO precoding once, as illustrated in FIG. 10, so the complexity of the receiver can be reduced.

[0203] Fig. 11 is a block diagram showing a broadcast signal transmission device when MIMO precoding is not applied to the core layer.

[0204] Referring to FIG. 11, a broadcast signal transmission device according to an embodiment of the present invention includes a core layer MIMO signal generation unit (610), an enhanced layer MIMO signal generation unit (620), a MIMO precoder (1110), injection level controllers (131, 132), combiners (133, 134), power normalizers (135, 136), framing & interleaving units (151, 152), and waveform generators (153, 154).

[0205] That is, in the structure illustrated in FIG. 11, only the MIMO precoder (1110) for the enhanced layer is provided before the injection level controller, so that the computational complexity can be reduced compared to the case where MIMO precoders are provided for both layers.

[0206] In particular, blocks that significantly affect receiver complexity in MIMO precoding may be the stream combining section and the phase hopping section, and thus only the phase hopping of the core layer may be prohibited, or only the stream combining of the core layer may be prohibited.

[0207] Figure 12 is a flowchart illustrating a broadcast signal transmission method according to one embodiment of the present invention.

[0208] Referring to FIG. 12, a broadcast signal transmission method according to an embodiment of the present invention generates core layer MIMO signals and enhanced layer MIMO signals (S1210).

[0209] 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.

[0210] 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.

[0211] 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.

[0212] At this time, if phase hopping corresponding to the core layer is activated, phase hopping corresponding to the enhanced layer can be activated.

[0213] 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.

[0214] 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.

[0215] In addition, a broadcast signal transmission method according to an embodiment of the present invention hierarchically multiplexes the core layer MIMO signals and the enhanced layer MIMO signals to generate a first superposition signal corresponding to the first polarization and a second superposition signal corresponding to the second polarization (S1220).

[0216] In addition, a broadcast signal transmission method according to one embodiment of the present invention generates injection level signaling information regarding injection levels corresponding to the enhanced layer MIMO signals (S1230).

[0217] At this time, the above injection levels can be set to the same injection level.

[0218] In addition, a broadcast signal transmission method according to an embodiment of the present invention 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 (S1240).

[0219] 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.

[0220] Each step illustrated in FIG. 12 may be performed in the order illustrated in FIG. 12, in the reverse order, or simultaneously.

[0221] Figure 13 is a flowchart illustrating a broadcast signal receiving method according to one embodiment of the present invention.

[0222] Referring to FIG. 13, a broadcast signal receiving method according to an embodiment of the present invention receives a first polarization transmission signal including a first preamble corresponding to a first polarization and a second polarization transmission signal including a second preamble corresponding to a second polarization (S1310).

[0223] At this time, the first preamble and the second preamble may include the same 5-bit injection level signaling information that is applied together for the first polarization and the second polarization.

[0224] In addition, a broadcast signal receiving method according to one embodiment of the present invention restores a core layer stream through MIMO decoding corresponding to the first polarization and the second polarization (S1320).

[0225] At this time, the MIMO decoding is performed corresponding to MIMO encoding including MIMO precoding, and the MIMO precoding can be performed using one or more of stream combining, IQ polarization interleaving, and phase hopping.

[0226] At this time, the stream combining, IQ polarization interleaving and phase hopping correspond to the first MIMO field, the second MIMO field and the third MIMO field, respectively, and 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.

[0227] In addition, a broadcast signal receiving method according to one embodiment of the present invention generates core layer MIMO signals through MIMO BICM corresponding to the core layer stream (S1330).

[0228] In addition, a broadcast signal receiving method according to an embodiment of the present invention performs cancellation using the core layer MIMO signals to extract first polarization enhanced layer symbols and second polarization enhanced layer symbols (S1340).

[0229] In addition, a broadcast signal receiving method according to an embodiment of the present invention restores an enhanced stream using the first polarization enhanced layer symbols and the second polarization enhanced layer symbols (S1350).

[0230] Each step illustrated in FIG. 13 may be performed in the order illustrated in FIG. 13, in the reverse order, or simultaneously.

[0231] Figure 14 is a block diagram showing a computer system configuration according to one embodiment of the present invention.

[0232] 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 (1400).

[0233] The computer system (1400) may include one or more processors (1410), memory (1430), user interface input devices (1440), user interface output devices (1450), and storage (1460) that communicate with each other via a bus (1420). The computer system (1400) may further include a network interface (1470) connected to a network (1480). The processor (1410) may be a central processing unit or a semiconductor device that executes programs or processing instructions stored in the memory (1430) or storage (1460). The memory (1430) and storage (1460) 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 (1430) may include a ROM (1431) or a RAM (1432).

[0234] At this time, at least one program can be recorded in the memory (1430).

[0235] At this time, the processor (1410) can execute the program. At this time, the program can perform each step illustrated in FIG. 12 or each step illustrated in FIG. 13.

[0236]

[0237] 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 each embodiment so that various modifications can be made.

Claims

1. A core layer MIMO signal generation unit that generates core layer MIMO signals; An enhanced layer MIMO signal generation unit that generates enhanced layer MIMO signals; An LDM combiner that hierarchically multiplexes the core layer MIMO signals and the enhanced layer MIMO signals to generate a first superposition signal corresponding to the first polarization and a second superposition signal corresponding to the second polarization; An L1 signaling generation unit that generates injection level signaling information regarding injection levels corresponding to the above enhanced layer MIMO signals; and A transmission signal generation unit that 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. A broadcast signal transmitting device including:

2. In claim 1, The above injection levels are A broadcast signal transmitting device set to the same injection level.

3. In claim 2, The above first preamble and the above second preamble A broadcast signal transmission device comprising the same 5-bit injection level signaling information corresponding to the above injection levels.

4. In claim 1, A broadcast signal transmission device, wherein the core layer MIMO signals are generated based on core layer MIMO precoding, and the enhanced layer MIMO signals are generated based on enhanced layer MIMO precoding.

5. In claim 4, A broadcast signal transmission device, wherein the core layer MIMO precoding and the enhanced layer MIMO precoding are each performed using at least one of stream combining, IQ polarization interleaving, and phase hopping.

6. In claim 5, A broadcast signal transmission device, wherein when IQ polarization interleaving corresponding to the core layer is activated, IQ polarization interleaving corresponding to the enhanced layer is activated.

7. In claim 6, A broadcast signal transmission device, wherein when phase hopping corresponding to the core layer is activated, phase hopping corresponding to the enhanced layer is activated.

8. In claim 7, A broadcast signal transmitting device, wherein the above stream combining, the IQ polarization interleaving and the phase hopping correspond to the first MIMO field, the second MIMO field and the third MIMO field, respectively.

9. In claim 8, A broadcast signal transmission device, wherein a second MIMO field corresponding to a core layer and a second MIMO field corresponding to an enhanced layer are set to be identical, and a third MIMO field corresponding to a core layer and a third MIMO field corresponding to an enhanced layer are set to be identical.

10. A step of generating core layer MIMO signals and enhanced layer MIMO signals; A step of hierarchically multiplexing the core layer MIMO signals and the enhanced layer MIMO signals to generate a first superposition signal corresponding to the first polarization and a second superposition signal corresponding to the second polarization; A step of generating injection level signaling information regarding injection levels corresponding to the above enhanced layer MIMO signals; and A step of generating 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 A method for transmitting a broadcast signal including:

11. In claim 10, The above injection levels are A method of transmitting a broadcast signal, wherein the method is set to the same injection level.

12. In claim 11, The above first preamble and the above second preamble A method for transmitting a broadcast signal, comprising the same 5-bit injection level signaling information corresponding to the above injection levels.

13. In claim 10, A method for transmitting a broadcast signal, wherein the core layer MIMO signals are generated based on core layer MIMO precoding, and the enhanced layer MIMO signals are generated based on enhanced layer MIMO precoding.

14. In claim 13, A method for transmitting a broadcast signal, wherein the core layer MIMO precoding and the enhanced layer MIMO precoding are each performed using at least one of stream combining, IQ polarization interleaving, and phase hopping.

15. In claim 14, A method for transmitting a broadcast signal, wherein when IQ polarization interleaving corresponding to a core layer is activated, IQ polarization interleaving corresponding to the enhanced layer is activated.

16. In claim 15, A method for transmitting a broadcast signal, wherein when phase hopping corresponding to a core layer is activated, phase hopping corresponding to the enhanced layer is activated.

17. In claim 16, A method for transmitting a broadcast signal, wherein the above stream combining, the IQ polarization interleaving and the phase hopping correspond to the first MIMO field, the second MIMO field and the third MIMO field, respectively.

18. In claim 17, A method for transmitting a broadcast signal, wherein a second MIMO field corresponding to a core layer and a second MIMO field corresponding to an enhanced layer are set identically, and a third MIMO field corresponding to the core layer and a third MIMO field corresponding to the enhanced layer are set identically.

19. A step of receiving a first polarization transmission signal including a first preamble corresponding to a first polarization and a second polarization transmission signal including a second preamble corresponding to a second polarization; A step of restoring a core layer stream through MIMO decoding corresponding to the first polarization and the second polarization; A step of generating core layer MIMO signals through MIMO BICM corresponding to the core layer stream; A step of extracting first polarization enhanced layer symbols and second polarization enhanced layer symbols by performing cancellation using the core layer MIMO signals; and A step of restoring an enhanced stream using the first polarization enhanced layer symbols and the second polarization enhanced layer symbols. A method for receiving a broadcast signal, comprising:

20. In claim 19, The above first preamble and the above second preamble A method for receiving a broadcast signal, comprising the same 5-bit injection level signaling information applied together for the first polarization and the second polarization.

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