Transmitting device, receiving device

Abstract

A transmitting / receiving system provided with a transmitter for transmitting a data signal, of which the horizontally and vertically polarized waves are made to be orthogonal, and a receiver for receiving data signals from the transmitter via a transmission line, wherein: for a first data signal transmitted using one of the horizontally and vertically polarized waves, a present SP signal, a next-generation SP signal, and a broadcast data signal included in the first data signal are arranged along the direction of elapsed time and a direction in which the frequency changes; for a second data signal transmitted using the other of the horizontally and vertically polarized waves, the next-generation SP signal, a NULL signal, and a broadcast data signal included in the second data signal are arranged along the direction of elapsed time and a direction in which the frequency changes; and the NULL signal is furthermore arranged at a position among first symbol signals at which the present SP signal is arranged.

Description

[Technical field]

[0001] The technology disclosed herein (the present technology) relates to a transmitting device that transmits a data signal by orthogonally intersecting horizontally polarized waves and vertically polarized waves, a receiving device that receives the data signal via a transmission path, and a transmission / reception system that includes the transmitting device and the receiving device. [Background technology]

[0002] As a method of transitioning from the current terrestrial television broadcasting system to the next-generation system, there is a technology that introduces a next-generation system that is compatible with the current system by using polarized MIMO (Multiple Input Multiple Output). An example of a technology that introduces a next-generation system that is compatible with the current system using polarized MIMO is the technology disclosed in Patent Document 1. In the technology disclosed in Patent Document 1, the current system's ISDB-T signal is transmitted by horizontal polarization, and the next-generation system's 4K signal is transmitted by part of the horizontal polarization and vertical polarization. In the technology disclosed in Patent Document 1, known signals called scattered pilot (SP) signals are inserted into the ISDB-T signal at regular intervals in the time axis direction and the frequency axis direction. A receiver for the current system that receives the ISDB-T signal demodulates the received current system signal by estimating a transmission path response from the SP signal defined by ISDB-T. In addition, in the technology disclosed in Patent Document 1, the horizontal polarization and vertical polarization include SP signals, and the commonly known polarized MIMO system is realized. Furthermore, a receiver for the next-generation system compatible with polarized MIMO demodulates the received next-generation system signal by estimating a transmission path response from the SP signal included in the horizontal polarization and the SP signal included in the vertical polarization. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-192052 A Summary of the Invention [Problem to be solved by the invention]

[0004] Receivers for the current system use, in addition to ISDB-T signals (2K signals, one-segment signals), SP signals defined by ISDB-T that are included in segments of horizontally polarized 4K signals, but cannot use SP signals included in vertically polarized waves that are not defined by ISDB-T. For this reason, the technology disclosed in Patent Document 1 cannot correct interference with SP signals defined by ISDB-T that are included in segments of horizontally polarized 4K signals, which is caused by broadcast data signals included in vertical polarization. This adversely affects the estimation of the transmission path response using the SP signals, which causes a problem of poor reception in receivers for the current system. In addition, the technology disclosed in Patent Document 1 reduces the power of the transmitted vertically polarized waves, which causes a problem of poor reception in receivers for the next-generation system.

[0005] In consideration of the above problems, the present technology aims to provide a transmitting device and a receiving device capable of reducing poor reception, and a transmitting / receiving system in which the transmitting device and the receiving device are connected via a transmission path. [Means for solving the problem]

[0006] A transmitting device according to one aspect of the present technology transmits a data signal by orthogonally intersecting horizontal polarization and vertical polarization, and includes a pilot signal generating unit, a first symbol generating unit, and a second symbol generating unit. The pilot signal generating unit generates a current SP signal used in a preset broadcasting method, a next-generation SP signal used in a method newer than the preset broadcasting method, and a NULL signal that sets power to zero. The first symbol generating unit generates a first symbol signal by arranging the current SP signal and the next-generation SP signal generated by the pilot signal generating unit and a broadcast data signal included in the first data signal and corresponding to the content to be broadcast along the direction of elapsed time and the direction of frequency change for a first data signal to be transmitted by one of the horizontal polarization and the vertical polarization. The second symbol generating unit generates a second symbol signal by arranging the next-generation SP signal and the NULL signal generated by the pilot signal generating unit and a broadcast data signal included in the second data signal and corresponding to the content to be broadcast along the direction of elapsed time and the direction of frequency change for a second data signal to be transmitted by the other of the horizontal polarization and the vertical polarization. Furthermore, the second symbol generating unit generates a second symbol signal by placing a NULL signal in the position where the first symbol generating unit placed the current SP signal.

[0007] A receiving device according to an aspect of the present technology is a receiving device that receives a data signal transmitted from a transmitting device and formed by orthogonally intersecting horizontal and vertical polarization via a plurality of transmission paths with different transmission path responses, and includes a transmission path estimating unit and a demodulating unit. The data signal transmitted from the transmitting device includes a next-generation SP signal used in a system newer than a preset broadcasting system, and an inverted SP signal obtained by inverting the sign of the next-generation SP signal. The data signal included in the horizontal polarization includes a next-generation SP signal arranged along the direction of elapsed time and the direction of frequency change. The data signal included in the vertical polarization includes a next-generation SP signal and an inverted SP signal arranged along the direction of elapsed time and the direction of frequency change. The transmission path estimating unit estimates the transmission path response using a signal in which the next-generation SP signal included in the data signal transmitted by the horizontal polarization and the next-generation SP signal included in the data signal transmitted by the vertical polarization are arranged at the same position, and a signal in which the next-generation SP signal included in the data signal transmitted by the horizontal polarization and the inverted SP signal included in the data signal transmitted by the vertical polarization are arranged at the same position, among the data signals formed by intersecting the horizontal and vertical polarizations. Moreover, the demodulation unit demodulates the data signal received via the transmission path, using the transmission path response estimated by the transmission path estimation unit.

[0008] A transmission / reception system according to one aspect of the present technology includes a transmission device that transmits a data signal by orthogonally intersecting horizontally polarized waves and vertically polarized waves, and a reception device that receives the data signal from the transmission device via a transmission path. The transmission device includes a pilot signal generation unit, a first symbol generation unit, and a second symbol generation unit. The pilot signal generation unit generates a current SP signal used in a preset broadcasting method, a next-generation SP signal used in a method newer than the preset broadcasting method, an inverted SP signal in which the code of the next-generation SP signal is inverted, and a NULL signal that sets the power to 0. The first symbol generation unit generates a first symbol signal by arranging the current SP signal and the next-generation SP signal generated by the pilot signal generation unit, and a broadcast data signal included in the first data signal and corresponding to the content to be broadcast, along the direction of elapsed time and the direction of frequency change, for a first data signal to be transmitted by one of the horizontally polarized wave and the vertically polarized wave. The second symbol generating unit generates a second symbol signal by arranging the next generation SP signal, the inverted SP signal, and the NULL signal generated by the pilot signal generating unit, and the broadcast data signal included in the second data signal and corresponding to the content to be broadcast, along the direction of time elapse and the direction of frequency change, for the second data signal to be transmitted by the other of the horizontally polarized wave and the vertically polarized wave. Furthermore, the second symbol generating unit generates the second symbol signal by arranging the NULL signal at the position where the first symbol generating unit arranged the current SP signal. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating a configuration of a transmission / reception system in a first embodiment. [Diagram 2] FIG. 2 is a diagram showing signals contained in horizontally polarized waves and vertically polarized waves. [Diagram 3] FIG. 2 is a block diagram showing a configuration of a transmitting device. [Figure 4] 13A and 13B are diagrams showing a horizontal symbol signal generated by a horizontal symbol generator and a vertical symbol signal generated by a vertical symbol generator. [Diagram 5] FIG. 2 is a block diagram showing a configuration of a receiving device. [Figure 6] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 7] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 8] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 9] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 10] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 11] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 12] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 13] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 14] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 15] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 16] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 17] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 18] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 19] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 20] FIG. 11 is a diagram showing a modified example of the first embodiment. [Figure 21] FIG. 11 is a diagram showing a horizontal side symbol signal generated by a horizontal side symbol generation section and a vertical side symbol signal generated by a vertical side symbol generation section in the second embodiment. [Figure 22] FIG. 13 is a diagram showing a modified example of the second embodiment. [Figure 23] FIG. 13 is a diagram showing a modified example of the second embodiment. [Figure 24] FIG. 13 is a diagram showing a modified example of the second embodiment. [Diagram 25] FIG. 13 is a diagram showing a modified example of the second embodiment. [Figure 26] FIG. 13 is a diagram showing a modified example of the second embodiment. [Figure 27]FIG. 13 is a diagram showing a modified example of the second embodiment. [Figure 28] FIG. 13 is a diagram showing a modified example of the second embodiment. [Figure 29] FIG. 13 is a diagram showing a modified example of the second embodiment. [Diagram 30] FIG. 13 is a diagram showing a modified example of the second embodiment. [Diagram 31] FIG. 13 is a block diagram showing a configuration of a receiving device included in a transmitting / receiving system of a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present technology will be described with reference to the drawings. In the description of the drawings, the same or similar parts are given the same or similar symbols, and duplicate descriptions are omitted. Each drawing is schematic and may differ from the actual one. The embodiments shown below are examples of devices and methods for embodying the technical idea of ​​the present technology, and the technical idea of ​​the present technology is not limited to the devices and methods exemplified in the following embodiments. The technical idea of ​​the present technology can be modified in various ways within the technical scope described in the claims.

[0011] (First embodiment) The receiving device, the transmitting device, and the transmitting / receiving system will be described below with reference to the drawings. As shown in FIG. 1, the transmission / reception system 1 includes a transmission device 100, a reception device 200, and a transmission path 300.

[0012] <Transmission and reception system configuration> The transmission / reception system 1 is, for example, a system related to digital television broadcasting. The transmitting device 100 is, for example, a device on the broadcasting station side that carries out digital television broadcasting. Furthermore, the transmitting device 100 processes the data signal input from the antenna 2, and transmits a horizontally polarized transmission signal S1 from the transmitting-side horizontal antenna 100a, and transmits a vertically polarized transmission signal S2 from the transmitting-side vertical antenna 100b. Specifically, the transmitting device 100 transmits the transmission signals S1 and S2 orthogonally. Thus, the transmitting device 100 transmits the data signal by orthogonally polarizing the horizontal and vertical polarizations.

[0013] As shown in Fig. 2, the horizontal polarization includes the current ISDB-T signal (2K signal, One Seg signal) and the next-generation 4K signal. The vertical polarization includes the 4K signal. The 4K signal contained in the horizontal polarization and the 4K signal contained in the vertical polarization are signals containing different data. The 4K signal contained in the horizontal polarization and the 4K signal contained in the vertical polarization are transmitted and received in a different layer (layer B) than the layer that transmits and receives the 2K signal and One Seg signal contained in the horizontal polarization (layer A for the One Seg signal and layer C for the 2K signal).

[0014] The receiving device 200 receives the receiving signal R1 and the receiving signal R2 from the transmitting device 100 via the transmission path 300 (network), and processes the data contained in the received receiving signal R1 and the received signal R2 to generate video and audio signals. Then, the receiving device 200 outputs the generated signals to the application device 3. Note that the transmission via the transmission path 300 can also be the transmission of information related to the content being broadcast. Specifically, the receiving device 200 receives a reception signal R1 via a receiving-side horizontal antenna 200a, and receives a reception signal R2 via a receiving-side vertical antenna 200b.

[0015] In FIG. 1, the transmission path from the transmitting horizontal antenna 100a to the receiving horizontal antenna 200a is represented by a transmission path response of h hh The symbol "h hh The transmission path from the horizontal antenna 100a on the transmitting side to the vertical antenna 200b on the receiving side is represented by a transmission path response of h hv The symbol "h hvSimilarly, the transmission path from the transmitting vertical antenna 100b to the receiving horizontal antenna 200a is represented by a transmission path response of h vh The symbol "h vh Furthermore, the transmission path from the transmitting vertical antenna 100b to the receiving vertical antenna 200b is represented by a transmission path response of h vv The symbol "h vv " is indicated. That is, the transmission path 300 is a plurality of transmission paths having different transmission path responses. Therefore, the receiving device 200 receives the data signal transmitted from the transmitting device 100 and formed by orthogonally crossing the horizontally polarized wave and the vertically polarized wave, via a plurality of transmission paths having different transmission path responses.

[0016] The application device 3 is, for example, a television, a tablet terminal, a smartphone, or the like.

[0017] <Configuration of the transmitting device> As shown in FIG. 3, transmitting apparatus 100 includes pilot signal generating section 101, horizontal symbol generating section 102, vertical symbol generating section 103, horizontal inverse transform section 104, and vertical inverse transform section 105.

[0018] The pilot signal generating unit 101 generates a current SP signal, a next generation SP signal, an inverted SP signal, and a NULL signal. The pilot signal generating unit 101 also outputs the generated current SP signal, next generation SP signal, inverted SP signal, and NULL signal to the horizontal side symbol generating unit 102 and the vertical side symbol generating unit 103.

[0019] The current SP signal is the SP signal used in the current terrestrial television broadcasting system. Next-generation SP signals are SP signals used in next-generation terrestrial television broadcasting systems (4K broadcasting, etc.). The inverted SP signal is a signal obtained by inverting the sign of the next-generation SP signal. The NULL signal is a signal that sets the power to zero.

[0020] The horizontal side symbol generation unit 102 receives the horizontal side data signal from the antenna 2. In addition, the horizontal side symbol generation unit 102 receives the current SP signal, next generation SP signal, inverted SP signal, and NULL signal from the pilot signal generation unit 101.

[0021] The horizontal data signals include broadcast data signals transmitted by horizontal polarization, TMCC signals, and AC signals. The broadcast data signal is a signal containing data corresponding to the contents to be broadcast, such as video data and audio data.

[0022] A TMCC (Transmission and Multiplexing Configuration Control) signal is a transmission control information signal that contains transmission parameter information, and is a signal that contains information necessary for receiving a data signal. The AC (Auxiliary Channel) signal is an auxiliary information signal that contains information related to emergency earthquake alerts.

[0023] Furthermore, the horizontal side symbol generation unit 102 generates a horizontal side symbol signal using the horizontal side data signal input from the antenna 2 and the current SP signal and next-generation SP signal input from the pilot signal generation unit 101. Then, the horizontal side symbol generation unit 102 outputs the generated horizontal side symbol signal to the horizontal side inverse transformation unit 104. Specifically, the horizontal side symbol generation unit 102 generates a horizontal side symbol signal by arranging the current SP signal, broadcast data signal, next-generation SP signal, TMCC signal, and AC signal along the direction of time elapse and the direction of frequency change, as shown by "horizontal polarization" in Fig. 4. In the first embodiment, as an example, a case will be described in which the horizontal side symbol generation unit 102 uniformly arranges one current SP signal, one next-generation SP signal, and two horizontal side data signals along the direction of time elapse.

[0024] In Fig. 4, the current SP signal is indicated by a circle with a cross inside, the broadcast data signal is indicated by a hollow circle, and the next-generation SP signal is indicated by a circle with a vertical line inside. Similarly, in Fig. 4, the TMCC signal is indicated by a circle with a shaded interior, and the AC signal is indicated by a circle with a shaded interior that is lighter than that of the TMCC signal. 4 is an arrangement generated by the horizontal symbol generating unit 102 at a certain time, and as time passes, an arrangement for the next time is generated. In the example shown in Fig. 4, four columns of symbols arranged along the elapsed time are shown as a group GP generated at the same time. As described above, the horizontal side symbol generation unit 102 generates a horizontal side symbol signal by arranging the current SP signal and next-generation SP signal generated by the pilot signal generation unit 101 and the broadcast data signal contained in the horizontal side data signal for transmission by horizontal polarization along the direction of elapsed time and the direction of frequency change.

[0025] The vertical side symbol generation unit 103 receives as input a vertical side data signal from the antenna 2. In addition, the vertical side symbol generation unit 103 receives as input a current SP signal, a next generation SP signal, an inverted SP signal, and a NULL signal from the pilot signal generation unit 101. The vertical side data signals include broadcast data signals transmitted by vertical polarization, TMCC signals, and AC signals.

[0026] Moreover, the vertical side symbol generation unit 103 generates a vertical side symbol signal using the vertical side data signal input from the antenna 2, the next generation SP signal input from the pilot signal generation unit 101, the inverted SP signal, and the NULL signal. Then, the vertical side symbol generation unit 103 outputs the generated vertical side symbol signal to the vertical side inverse transformation unit 105. Specifically, the vertical side symbol generation unit 103 generates a vertical side symbol signal by arranging the NULL signal, next generation SP signal, inverted SP signal, and broadcast data signal along the direction of elapsed time and the direction of frequency change, as shown by "vertical polarization" in Figure 4.

[0027] In FIG. 4, the NULL signal is indicated by a circle with a darker shaded area inside than the TMCC signal, and the inverted SP signal is indicated by a circle with a shaded grid inside. In addition, the arrangement shown in FIG. 4 is an arrangement generated by vertical side symbol generation unit 103 at the same time as horizontal side symbol generation unit 102, and like horizontal side symbol generation unit 102, it generates an arrangement for the next time each time time passes.

[0028] Furthermore, as shown in FIG. 4, when generating a vertical side symbol signal, the vertical side symbol generation unit 103 places a NULL signal at the position where the horizontal side symbol generation unit 102 has placed the current SP signal and at the position where the horizontal side symbol generation unit 102 has placed the TMCC signal. The vertical side symbol generating unit 103 performs the process of allocating NULL signals to all 4K signals included in the vertically polarized waves.

[0029] Furthermore, when generating a vertical symbol signal, the vertical symbol generation unit 103 places a NULL signal in the position where the horizontal symbol generation unit 102 placed the AC signal. In addition, when generating a vertical side symbol signal, the vertical side symbol generation unit 103 places an inverted SP signal in a part of the position where the next generation SP signal was placed by the horizontal side symbol generation unit 102. In the first embodiment, as an example, a case will be described in which the inverted SP signals are alternately placed in the position where the horizontal side symbol generation unit 102 placed the next generation SP signal for two groups GPa and GPb that are consecutive along the elapsed time.

[0030] As described above, the vertical side symbol generation unit 103 generates a vertical side symbol signal by arranging the next-generation SP signal, inverted SP signal, and NULL signal generated by the pilot signal generation unit 101, and the broadcast data signal contained in the vertical side data signal to be transmitted by vertical polarization, along the direction of elapsed time and the direction of frequency change.

[0031] The horizontal side inverse transform unit 104 generates a horizontal side time domain signal by performing, for example, an inverse Fourier transform (IFFT) operation on the horizontal side symbol signal input from the horizontal side symbol generation unit 102. Then, the horizontal side inverse transform unit 104 outputs the generated horizontal side time domain signal to the transmitting side horizontal antenna 100a. The horizontal side time domain signal output to the transmitting side horizontal antenna 100a is transmitted to the receiving device 200 via the transmission path 300.

[0032] The vertical side inverse transform unit 105 generates a vertical side time domain signal by performing, for example, an inverse Fourier transform operation on the vertical side symbol signal input from the vertical side symbol generation unit 103. Then, the vertical side inverse transform unit 105 outputs the generated vertical side time domain signal to the transmitting side vertical antenna 100b. The vertical side time domain signal output to the transmitting side vertical antenna 100b is transmitted to the receiving device 200 via the transmission path 300.

[0033] <Configuration of receiving device> 5, the receiving device 200 includes a horizontal conversion unit 201, a vertical conversion unit 202, a horizontal signal extraction unit 203, a vertical signal extraction unit 204, a horizontal transmission channel estimation unit 205, a vertical transmission channel estimation unit 206, and a demodulation unit 207. Note that in the first embodiment, as an example, a case will be described in which the receiving device 200 is configured to receive a 4K signal.

[0034] The horizontal side transform unit 201 generates a horizontal side received signal by performing, for example, a Fourier transform (FFT) operation on the signal input from the receiving side horizontal antenna 200a. Then, the horizontal side transform unit 201 outputs the generated horizontal side received signal to the horizontal side signal extraction unit 203 and the demodulation unit 207. The signal input from the receiving horizontal antenna 200a is the signal from the transmitting horizontal antenna 100a with a transmission path response of h hh The signal received by the receiving horizontal antenna 200a through the transmission path (see FIG. 1). In addition, the signal input from the receiving horizontal antenna 200a is the signal received from the transmitting vertical antenna 100b with a transmission path response of h vhThis is a signal received by the receiving horizontal antenna 200a via the transmission path (see FIG. 1).

[0035] The vertical side transform unit 202 generates a vertical side received signal by performing, for example, a Fourier transform operation on the signal input from the receiving side vertical antenna 200b. Then, the vertical side transform unit 202 outputs the generated vertical side received signal to the vertical side signal extraction unit 204 and the demodulation unit 207. The signal input from the receiving vertical antenna 200b is the signal from the transmitting horizontal antenna 100a with a transmission path response of h hv The signal received by the horizontal receiving antenna 200a through the transmission path (see FIG. 1). In addition, the signal input from the vertical receiving antenna 200b is the signal received from the vertical transmitting antenna 100b with a transmission path response of h vv This is a signal received by the receiving horizontal antenna 200a via the transmission path (see FIG. 1).

[0036] The horizontal side signal extraction unit 203 extracts a next-generation SP signal and an inverted SP signal from the horizontal side received signal input from the horizontal side conversion unit 201. Then, the horizontal side signal extraction unit 203 outputs the extracted next-generation SP signal and inverted SP signal to the horizontal side transmission channel estimation unit 205. The vertical side signal extraction unit 204 extracts a next-generation SP signal and an inverted SP signal from the vertical side received signal input from the vertical side conversion unit 202. Then, the vertical side signal extraction unit 204 outputs the extracted next-generation SP signal and inverted SP signal to the vertical side transmission channel estimation unit 206.

[0037] The horizontal channel estimator 205 estimates the channel response h hh and the transmission line response h vh Then, the horizontal side transmission channel estimating unit 205 estimates the estimated transmission channel response h hh and the transmission line response h vh is output to demodulation section 207.

[0038] First, among the signals input from the receiving horizontal antenna 200a, the next-generation SP signal received from the transmitting horizontal antenna 100a and the next-generation SP signal received from the transmitting vertical antenna 100b, which are located at the same position, are referred to as "P sum ". Furthermore, the next generation SP signal is defined as "p" and "P sum =ph hh +ph vh " is defined as the relation: Next, the next-generation SP signal received from the transmitting-side horizontal antenna 100a and the inverted SP signal received from the transmitting-side vertical antenna 100b, which are arranged in the same position, are called "P diff ". Furthermore, the next generation SP signal is defined as "p" and "P diff =ph hh -ph vh " is defined as the relation:

[0039] And the signal P sum and signal P diff By interpolating each of the above in the direction of elapsed time and the direction of frequency, the signal P sum and signal P diff Calculate. Here, the relation "P sum =ph hh +ph vh " and the relation "P diff =ph hh -ph vh "The unknown variable is the transmission line response h hh and the transmission line response h vh Therefore, by solving these two equations as simultaneous equations, the transmission channel response h hh and the transmission line response h vh Estimate.

[0040] The vertical channel estimator 206 estimates the channel response h hv and the transmission line response h vv Then, the vertical channel estimator 206 estimates the estimated channel response h hv and the transmission line response h vvis output to demodulation section 207.

[0041] First, among the signals input from the receiving vertical antenna 200b, the next-generation SP signal received from the transmitting horizontal antenna 100a and the next-generation SP signal received from the transmitting vertical antenna 100b, which are located at the same position, are referred to as "P sum ". Furthermore, the next generation SP signal is defined as "p" and "P sum =ph hv +ph vv " is defined as the relation: Next, the next-generation SP signal received from the transmitting-side horizontal antenna 100a and the inverted SP signal received from the transmitting-side vertical antenna 100b, which are arranged in the same position, are called "P diff ". Furthermore, the next generation SP signal is defined as "p" and "P diff =ph hv -ph vv " is defined as the relation:

[0042] And the signal P sum and signal P diff By interpolating each of the above in the direction of elapsed time and the direction of frequency, the signal P sum and signal P diff Calculate. Here, the relation "P sum =ph hv +ph vv " and the relation "P diff =ph hv -ph vv "The unknown variable is the transmission line response h hv and the transmission line response h vv Therefore, by solving these two equations as simultaneous equations, the transmission channel response h hv and the transmission line response h vv Estimate.

[0043] The demodulator 207 multiplies the received signal R1 and the received signal R2 by the inverse matrix of the transmission channel response matrix using the following relational expression (1).hh and the channel response h vh and the transmission channel response h estimated by the vertical channel estimation unit 206. hv and the channel response h vv The matrix is ​​formed by the above. With this, the demodulation unit 207 demodulates the transmission signal S1 and the transmission signal S2. Then, the demodulation unit 207 outputs the demodulated transmission signal S1 and the transmission signal S2 to the application apparatus 3.

[0044]

number

[0045] That is, the demodulator 207 demodulates the data signal received via the transmission channel 300 using the transmission channel response estimated by the transmission channel estimators (the horizontal side transmission channel estimator 205 and the vertical side transmission channel estimator 206).

[0046] As described above, the data signal transmitted from the transmitting device 100 includes a next-generation SP signal and an inverted SP signal. The data signal included in the horizontal polarization includes a next-generation SP signal arranged along the direction of elapsed time and the direction in which the frequency changes, and the data signal included in the vertical polarization includes a next-generation SP signal and an inverted SP signal arranged along the direction of elapsed time and the direction in which the frequency changes. The horizontal-side transmission channel estimating unit 205 and the vertical-side transmission channel estimating unit 206 estimate the transmission channel response using, among the data signals formed by orthogonalizing, a signal in which the next-generation SP signal included in the data signal transmitted by the horizontal polarization and the next-generation SP signal included in the data signal transmitted by the vertical polarization are arranged at the same position, and a signal in which the next-generation SP signal included in the data signal transmitted by the horizontal polarization and the inverted SP signal included in the data signal transmitted by the vertical polarization are arranged at the same position.

[0047] <Correspondence to claims> In the first embodiment, the horizontal polarization corresponds to one of the horizontal polarization and the vertical polarization, the horizontal side data signal corresponds to the first data signal, the horizontal side symbol signal corresponds to the first symbol signal, and the horizontal side symbol generator 102 corresponds to the first symbol generator. In the first embodiment, the vertical polarization corresponds to the other of the horizontal polarization and the vertical polarization, the vertical side data signal corresponds to the second data signal, the vertical side symbol signal corresponds to the second symbol signal, and the vertical side symbol generator 103 corresponds to the second symbol generator.

[0048] <Actions and Effects of the First Embodiment> The transmitting device 100 of the first embodiment can provide the following functions and effects. (1) The horizontal side symbol generation unit 102 generates a horizontal side symbol signal by arranging the current SP signal, next-generation SP signal, and broadcast data signal included in the horizontal side data signal along the direction of elapsed time and the direction of frequency change for the horizontal side data signal. In addition, the vertical side symbol generation unit 103 generates a vertical side symbol signal by arranging the next-generation SP signal and NULL signal, and broadcast data signal included in the vertical side data signal along the direction of elapsed time and the direction of frequency change for the vertical side data signal. Furthermore, the vertical side symbol generation unit 103 generates a vertical side symbol signal by arranging a NULL signal in the position where the horizontal side symbol generation unit 102 arranged the current SP signal. This makes it possible to reduce interference with the current SP signal contained in a horizontally polarized 4K signal segment generated by a broadcast data signal contained in vertical polarization, thereby providing a transmitting device 100 that can improve the reception environment of receivers for current broadcasts and reduce poor reception. In addition, it will be possible to reduce interference with current SP signals in horizontally polarized 4K signal segments without reducing the power of carriers that require vertical polarization, thereby suppressing adverse effects on reception using polarized MIMO methods. This makes it possible to provide a transmitting device 100 that can suppress a decrease in the power of the transmitted vertically polarized wave and reduce poor reception in receivers for next-generation systems.

[0049] (2) The horizontal side data signal further includes a TMCC signal, and the vertical side symbol generator 103 generates a vertical side symbol signal by placing a NULL signal in the position where the horizontal side symbol generator 102 placed the TMCC signal. This makes it possible to reduce interference with TMCC signals contained in horizontally polarized 4K signal segments caused by broadcast data signals contained in vertically polarized waves, thereby improving the reception environment of current broadcast receivers and providing a transmitting device that can reduce poor reception.

[0050] (3) The horizontal side data signal further includes an AC signal, and the vertical side symbol generator 103 generates a vertical side symbol signal by placing a NULL signal in the position where the horizontal side symbol generator 102 placed the AC signal. This makes it possible to reduce interference with the AC signal contained in the horizontally polarized 4K signal segment generated by the broadcast data signal contained in the vertically polarized wave, thereby improving the reception environment of receivers for current broadcasting and providing a transmitting device that can reduce poor reception.

[0051] (4) The pilot signal generator 101 generates an inverted SP signal by inverting the sign of the next-generation SP signal. In addition, the vertical side symbol generator 103 further generates a vertical side symbol signal by arranging the inverted SP signal generated by the pilot signal generator 101 in a part of the position where the horizontal side symbol generator 102 arranged the next-generation SP signal. This enables the receiver to estimate the channel response using a code-inversion polarized MIMO system, making it possible to reduce poor reception.

[0052] (5) The first data signal is a horizontal side data signal for transmission with horizontal polarization, and the second data signal is a vertical side data signal for transmission with vertical polarization. This makes it possible to reduce interference with horizontal polarization caused by signals contained in vertical polarization and interference with vertical polarization caused by signals contained in horizontal polarization, thereby improving the reception environment of the receiving device 200 and providing a transmitting device that can reduce poor reception.

[0053] The receiving device 200 of the first embodiment can provide the following functions and effects. (6) The horizontal-side transmission channel estimating unit 205 and the vertical-side transmission channel estimating unit 206 estimate a transmission channel response using a signal in which the next-generation SP signal contained in the data signal transmitted by horizontal polarization and the next-generation SP signal contained in the data signal transmitted by vertical polarization are arranged at the same position, and a signal in which the next-generation SP signal contained in the data signal transmitted by horizontal polarization and the inverted SP signal contained in the data signal transmitted by vertical polarization are arranged at the same position, among the data signals formed by orthogonalizing. In addition, the demodulating unit 207 demodulates the data signal received via the transmission channel 300 using the transmission channel responses estimated by the horizontal-side transmission channel estimating unit 205 and the vertical-side transmission channel estimating unit 206. This makes it possible to correct interference that occurs in the transmission path for the received data signal, thereby improving the receiving environment of the receiving device 200 and providing a receiving device 200 that can reduce poor reception.

[0054] The transmission and reception system 1 of the first embodiment can provide the following functions and effects. (7) The vertical side symbol generator 103 included in the transmitting device 100 generates a vertical side symbol signal by placing a NULL signal in the position where the horizontal side symbol generator 102 included in the transmitting device 100 placed the current SP signal. This makes it possible to reduce interference with the current SP signal contained in a horizontally polarized 4K signal segment caused by a broadcast data signal contained in vertical polarization, thereby providing a transmission / reception system 1 that can improve the reception environment of receivers for current broadcasts and reduce poor reception.

[0055] <Modification of the first embodiment> (1) In the first embodiment, the vertical side symbol generation unit 103 generates the vertical side symbol signal by arranging a NULL signal at the position where the horizontal side symbol generation unit 102 arranged the TMCC signal, but this is not limited to the above. That is, for example, as shown in Fig. 6, the vertical side symbol generation unit 103 may generate the vertical side symbol signal by arranging a broadcast data signal at the position where the horizontal side symbol generation unit 102 arranged the TMCC signal. In this case, it is possible to improve the transmission efficiency of signals transmitted using vertical polarization.

[0056] (2) In the first embodiment, the vertical side symbol generation unit 103 generates the vertical side symbol signal by arranging a NULL signal at the position where the horizontal side symbol generation unit 102 arranged the AC signal, but this is not limited to this. That is, for example, as shown in Fig. 6, the vertical side symbol generation unit 103 may generate the vertical side symbol signal by arranging a broadcast data signal at the position where the horizontal side symbol generation unit 102 arranged the AC signal. In this case, it is possible to improve the transmission efficiency of signals transmitted using vertical polarization.

[0057] (3) In the first embodiment, the first data signal is a horizontal side data signal for transmission with horizontal polarization, and the second data signal is a vertical side data signal for transmission with vertical polarization, but this is not limited to this. That is, the first data signal may be a horizontal side data signal for transmission with vertical polarization, and the second data signal may be a vertical side data signal for transmission with horizontal polarization. In this case, in areas where the current ISDB-T signal is transmitted using vertical polarization, it will be possible to reduce interference with the current SP signals, TMCC signals, and AC signals contained in the vertically polarized 4K signal segments caused by the broadcast data signal contained in the horizontal polarization, thereby improving the reception environment for receivers intended for current broadcasting and reducing poor reception.

[0058] (4) In the first embodiment, the vertical side symbol generation unit 103 is configured to place a NULL signal on all 4K signals included in the vertical polarization, but this is not limited to the above. That is, for example, as shown in Fig. 7, the vertical side symbol generation unit 103 may be configured to place a NULL signal only on the 4K signals included in the vertical polarization near the boundary with the One Seg signal or near the boundary with the 2K signal.

[0059] (5) In the first embodiment, the horizontal side symbol generating unit 102 is configured to uniformly arrange one current SP signal, one next-generation SP signal, and two horizontal side data signals along the direction of elapsed time, but the present invention is not limited to this. That is, for example, as shown in Fig. 8 to Fig. 19, the horizontal side symbol generating unit 102 may be configured to unevenly arrange the current SP signal, the next-generation SP signal, and the horizontal side data signal along the direction of elapsed time. Also, for example, as shown in Fig. 20, the next-generation SP signal and the inverted SP signal may be arranged to avoid the position of the TMCC signal.

[0060] Second embodiment The receiving device, the transmitting device, and the transmitting / receiving system will be described below with reference to the drawings. Note that in the following description, descriptions of parts common to the first embodiment may be omitted. The transmission / reception system according to the second embodiment includes a transmission device 100, a reception device 200, and a transmission line 300 (see FIG. 1).

[0061] <Configuration of the transmitting device> The transmitting device 100 includes a pilot signal generating unit 101, a horizontal symbol generating unit 102, a vertical symbol generating unit 103, a horizontal inverse transform unit 104, and a vertical inverse transform unit 105 (see FIG. 3).

[0062] The pilot signal generating unit 101 generates a current SP signal, a next-generation SP signal, and a NULL signal. The pilot signal generating unit 101 also outputs the generated current SP signal, next-generation SP signal, and NULL signal to the horizontal side symbol generating unit 102 and the vertical side symbol generating unit 103. The horizontal side symbol generating unit 102 receives as input a horizontal side data signal from the antenna 2. In addition, the horizontal side symbol generating unit 102 receives as input a current SP signal and a NULL signal from the pilot signal generating unit 101.

[0063] The horizontal data signals include broadcast data signals transmitted by horizontal polarization, TMCC signals, and AC signals. Furthermore, the horizontal side symbol generation unit 102 generates a horizontal side symbol signal using the horizontal side data signal input from the antenna 2 and the current SP signal and NULL signal input from the pilot signal generation unit 101. Then, the horizontal side symbol generation unit 102 outputs the generated horizontal side symbol signal to the horizontal side inverse transformation unit 104. Specifically, the horizontal side symbol generation unit 102 generates a horizontal side symbol signal by arranging the current SP signal, broadcast data signal, NULL signal, TMCC signal, and AC signal along the direction of elapsed time and the direction of frequency change, as shown by "horizontal polarization" in Fig. 21. In the second embodiment, as an example, a case will be described in which the horizontal side symbol generation unit 102 uniformly arranges one current SP signal, one horizontal side data signal, one NULL signal, and one horizontal side data signal along the direction of elapsed time.

[0064] 21 is an arrangement generated by the horizontal symbol generation unit 102 at a certain time, and as time passes, an arrangement for the next time is generated. In the example shown in Fig. 21, four columns of symbols arranged along the elapsed time are shown as a group GP generated at the same time. As described above, the horizontal side symbol generation unit 102 generates a horizontal side symbol signal by arranging the current SP signal and NULL signal generated by the pilot signal generation unit 101 and the broadcast data signal contained in the horizontal side data signal to be transmitted by horizontal polarization along the direction of elapsed time and the direction of frequency change.

[0065] The vertical side symbol generator 103 receives a vertical side data signal from the antenna 2. In addition, the vertical side symbol generator 103 receives a next generation SP signal and a NULL signal from the pilot signal generator 101. The vertical side data signals include broadcast data signals transmitted by vertical polarization, TMCC signals, and AC signals.

[0066] Furthermore, the vertical side symbol generation unit 103 generates a vertical side symbol signal using the vertical side data signal input from the antenna 2 and the next-generation SP signal and NULL signal input from the pilot signal generation unit 101. Then, the vertical side symbol generation unit 103 outputs the generated vertical side symbol signal to the vertical side inverse transformation unit 105. Specifically, the vertical side symbol generation unit 103 generates a vertical side symbol signal by arranging the NULL signal, broadcast data signal, and next-generation SP signal along the direction of elapsed time and the direction of frequency change, as shown by "vertical polarization" in Figure 21.

[0067] Moreover, the arrangement shown in FIG. 21 is an arrangement generated by vertical side symbol generation unit 103 at the same time as horizontal side symbol generation unit 102, and like horizontal side symbol generation unit 102, it generates an arrangement for the next time each time time passes. 21, when generating a vertical side symbol signal, the vertical side symbol generation unit 103 places a NULL signal at the position where the horizontal side symbol generation unit 102 has placed the current SP signal. Also, the vertical side symbol generation unit 103 places a next-generation SP signal at the position where the horizontal side symbol generation unit 102 has placed the NULL signal. In addition, the vertical side symbol generation unit 103 places a NULL signal at the position where the horizontal side symbol generation unit 102 has placed the TMCC signal and at the position where the horizontal side symbol generation unit 102 has placed the AC signal.

[0068] The vertical side symbol generating unit 103 performs the process of allocating the next-generation SP signal and the process of allocating the NULL signal to all 4K signals including the vertically polarized wave. As described above, the vertical side symbol generation unit 103 generates a vertical side symbol signal by arranging the next-generation SP signal and NULL signal generated by the pilot signal generation unit 101 and the broadcast data signal contained in the vertical side data signal to be transmitted by vertical polarization along the direction of elapsed time and the direction of frequency change. The horizontal inverse transformation unit 104 and the vertical inverse transformation unit 105 have the same configurations as those in the first embodiment.

[0069] <Configuration of receiving device> The receiving device 200 includes a horizontal conversion unit 201, a vertical conversion unit 202, a horizontal signal extraction unit 203, a vertical signal extraction unit 204, a horizontal transmission channel estimation unit 205, a vertical transmission channel estimation unit 206, and a demodulation unit 207 (see FIG. 5). Note that in the second embodiment, as in the first embodiment, a case where the receiving device 200 is configured to receive a 4K signal will be described as an example. The configurations of the horizontal conversion unit 201 and the vertical conversion unit 202 are similar to those in the first embodiment.

[0070] The horizontal side signal extraction unit 203 extracts the current SP signal and the NULL signal from the horizontal side received signal input from the horizontal side conversion unit 201. Then, the horizontal side signal extraction unit 203 outputs the extracted current SP signal and NULL signal to the horizontal side transmission channel estimation unit 205. The vertical side signal extraction unit 204 extracts a next-generation SP signal and a NULL signal from the vertical side received signal input from the vertical side conversion unit 202. Then, the vertical side signal extraction unit 204 outputs the extracted next-generation SP signal and NULL signal to the vertical side transmission channel estimation unit 206.

[0071] The horizontal channel estimator 205 estimates the channel response h hh and the transmission line response h vh Then, the horizontal side transmission channel estimating unit 205 estimates the estimated transmission channel response h hh and the transmission line response h vh is output to the demodulation unit 207. First, among the signals input from the receiving horizontal antenna 200a, the signal in which the current SP signal received from the transmitting horizontal antenna 100a and the NULL signal received from the transmitting vertical antenna 100b are located at the same position is defined as "Ph". Furthermore, the current SP signal is defined as "p", and "Ph=ph hh " is defined as the relation:

[0072] Next, a signal in which the NULL signal received from the horizontal antenna 100a and the next-generation SP signal received from the vertical antenna 100b are located at the same position is defined as "Pv". Furthermore, the next-generation SP signal is defined as "p", and "Pv=ph vh " is defined as the relation: Then, the signals Ph and Pv are each interpolated in the direction of elapsed time and the direction of frequency to calculate the signals Ph and Pv for the portion of the broadcast data signal received by the receiving device 200. Here, the relationship "Ph = ph hh " and the relation "Pv = ph vh "The unknown variable is the transmission line response h hh and the transmission line response h vh Therefore, by solving each of the two relations as an equation, the transmission channel response h hh and the transmission line response h vh Estimate.

[0073] The vertical channel estimator 206 estimates the channel response h hv and the transmission line response h vv Then, the vertical channel estimator 206 estimates the estimated channel response h hv and the transmission line response h vv is output to the demodulation unit 207. First, among the signals input from the receiving vertical antenna 200b, the signal in which the current SP signal received from the transmitting horizontal antenna 100a and the NULL signal received from the transmitting vertical antenna 100b are located at the same position is defined as "Ph". Furthermore, the current SP signal is defined as "p", and "Ph=ph hv " is defined as the relation:

[0074] Next, the NULL received from the horizontal antenna 100a and the next-generation SP signal received from the vertical antenna 100b are placed at the same position and defined as "Pv". Furthermore, the next-generation SP signal is defined as "p", and "Pv=ph vv " is defined as the relation: Then, the signals Ph and Pv are each interpolated in the direction of elapsed time and the direction of frequency to calculate the signals Ph and Pv for the portion of the broadcast data signal received by the receiving device 200. Here, the relationship "Ph = ph hv " and the relation "Pv = ph vv "The unknown variable is the transmission line response h hv and the transmission line response h vv Therefore, by solving each of the two relations as an equation, the transmission channel response h hv and the transmission line response h vv Estimate. The configuration of the demodulation unit 207 is the same as in the first embodiment.

[0075] <Correspondence to claims> In the second embodiment, the horizontal polarization corresponds to one of the horizontal polarization and the vertical polarization, the horizontal side data signal corresponds to the first data signal, and the horizontal side symbol signal corresponds to the first symbol signal, and the horizontal side symbol generator 102 corresponds to the first symbol generator. In the second embodiment, the vertical polarization corresponds to the other of the horizontal polarization and the vertical polarization, the vertical side data signal corresponds to the second data signal, the vertical side symbol signal corresponds to the second symbol signal, and the vertical side symbol generator 103 corresponds to the second symbol generator.

[0076] <Actions and Effects of the Second Embodiment> The transmitting device 100 of the second embodiment can provide the following functions and effects. (1) The horizontal side symbol generation unit 102 generates a horizontal side symbol signal by arranging the current SP signal, NULL signal, and broadcast data signal included in the horizontal side data signal along the direction of elapsed time and the direction of frequency change for the horizontal side data signal. In addition, the vertical side symbol generation unit 103 generates a vertical side symbol signal by arranging the next-generation SP signal, NULL signal, and broadcast data signal included in the vertical side data signal along the direction of elapsed time and the direction of frequency change for the vertical side data signal. Furthermore, the vertical side symbol generation unit 103 generates a vertical side symbol signal by arranging a NULL signal in the position where the horizontal side symbol generation unit 102 arranged the current SP signal, and arranging a next-generation SP signal in the position where the horizontal side symbol generation unit 102 arranged the NULL signal. This makes it possible to reduce interference with the current SP signal contained in a horizontally polarized 4K signal segment generated by a broadcast data signal contained in vertical polarization, thereby providing a transmitting device 100 that can improve the reception environment of receivers for current broadcasts and reduce poor reception. In addition, it will be possible to reduce interference with current SP signals in horizontally polarized 4K signal segments without reducing the power of carriers that require vertical polarization, thereby suppressing adverse effects on reception using polarized MIMO methods. This makes it possible to provide a transmitting device 100 that can suppress a decrease in the power of the transmitted vertically polarized wave and reduce poor reception in receivers for next-generation systems.

[0077] (2) The horizontal side data signal further includes a TMCC signal, and the vertical side symbol generator 103 generates a vertical side symbol signal by placing a NULL signal in the position where the horizontal side symbol generator 102 placed the TMCC signal. This makes it possible to reduce interference with TMCC signals contained in horizontally polarized 4K signal segments caused by broadcast data signals contained in vertically polarized waves, thereby improving the reception environment of current broadcast receivers and providing a transmitting device that can reduce poor reception.

[0078] (3) The horizontal side data signal further includes an AC signal, and the vertical side symbol generator 103 generates a vertical side symbol signal by placing a NULL signal in the position where the horizontal side symbol generator 102 placed the AC signal. This makes it possible to reduce interference with the AC signal contained in the horizontally polarized 4K signal segment generated by the broadcast data signal contained in the vertically polarized wave, thereby improving the reception environment of receivers for current broadcasting and providing a transmitting device that can reduce poor reception.

[0079] (4) The first data signal is a horizontal side data signal for transmission with horizontal polarization, and the second data signal is a vertical side data signal for transmission with vertical polarization. This makes it possible to reduce interference with horizontal polarization caused by signals contained in vertical polarization and interference with vertical polarization caused by signals contained in horizontal polarization, thereby improving the reception environment of the receiving device 200 and providing a transmitting device that can reduce poor reception.

[0080] The receiving device 200 of the second embodiment can provide the following functions and effects. (5) The horizontal-side transmission channel estimating unit 205 and the vertical-side transmission channel estimating unit 206 estimate a transmission channel response using a signal in which the current SP signal included in the data signal transmitted by horizontal polarization and the NULL signal included in the data signal transmitted by vertical polarization are arranged at the same position, and a signal in which the NULL signal included in the data signal transmitted by horizontal polarization and the next-generation SP signal included in the data signal transmitted by vertical polarization are arranged at the same position, among the data signals formed by orthogonalizing. In addition, the demodulating unit 207 demodulates the data signal received via the transmission channel 300 using the transmission channel responses estimated by the horizontal-side transmission channel estimating unit 205 and the vertical-side transmission channel estimating unit 206. This makes it possible to correct interference that occurs in the transmission path for the received data signal, thereby improving the receiving environment of the receiving device 200 and providing a receiving device 200 that can reduce poor reception.

[0081] The transmission and reception system 1 of the second embodiment can provide the following functions and effects. (6) The vertical side symbol generator 103 included in the transmitting device 100 generates a vertical side symbol signal by placing a NULL signal in the position where the horizontal side symbol generator 102 included in the transmitting device 100 placed the current SP signal. This makes it possible to reduce interference with the current SP signal contained in a horizontally polarized 4K signal segment caused by a broadcast data signal contained in vertical polarization, thereby providing a transmission / reception system 1 that can improve the reception environment of receivers for current broadcasts and reduce poor reception.

[0082] <Modification of the second embodiment> (1) In the second embodiment, the vertical side symbol generation unit 103 generates the vertical side symbol signal by arranging a NULL signal at the position where the horizontal side symbol generation unit 102 arranged the TMCC signal, but this is not limited to the above. That is, the vertical side symbol generation unit 103 may generate the vertical side symbol signal by arranging a broadcast data signal at the position where the horizontal side symbol generation unit 102 arranged the TMCC signal. In this case, it is possible to improve the transmission efficiency of signals transmitted using vertical polarization.

[0083] (2) In the second embodiment, the vertical side symbol generation unit 103 generates a vertical side symbol signal by arranging a NULL signal at the position where the horizontal side symbol generation unit 102 arranged the AC signal, but this is not limited to the above. That is, the vertical side symbol generation unit 103 may generate a vertical side symbol signal by arranging a broadcast data signal at the position where the horizontal side symbol generation unit 102 arranged the AC signal. In this case, it is possible to improve the transmission efficiency of signals transmitted using vertical polarization.

[0084] (3) In the second embodiment, the first data signal is a horizontal side data signal for transmission with horizontal polarization, and the second data signal is a vertical side data signal for transmission with vertical polarization, but this is not limiting. That is, the first data signal may be a horizontal side data signal for transmission with vertical polarization, and the second data signal may be a vertical side data signal for transmission with horizontal polarization. In this case, in areas where the current ISDB-T signal is transmitted using vertical polarization, it will be possible to reduce interference with the current SP signals, TMCC signals, and AC signals contained in the vertically polarized 4K signal segments caused by the broadcast data signal contained in the horizontal polarization, thereby improving the reception environment for receivers intended for current broadcasting and reducing poor reception.

[0085] (4) In the second embodiment, the horizontal side symbol generating unit 102 is configured to uniformly arrange one current SP signal, one horizontal side data signal, one NULL signal, and one horizontal side data signal along the direction of elapsed time, but this is not limited to this. That is, for example, as shown in Figures 22 to 30, the horizontal side symbol generating unit 102 may be configured to non-uniformly arrange the current SP signal, next generation SP signal, NULL signal, and horizontal side data signal along the direction of elapsed time.

[0086] Third embodiment The receiving device, the transmitting device, and the transmitting / receiving system will be described below with reference to the drawings. Note that in the following description, descriptions of parts common to the first and second embodiments may be omitted. The transmission / reception system according to the third embodiment includes a transmission device 100, a reception device 200, and a transmission path 300 (see FIG. 1).

[0087] <Configuration of the transmitting device> The configuration of the transmitting device 100 is similar to that of the first embodiment.

[0088] <Configuration of receiving device> 31, the receiving device 200 includes a horizontal conversion unit 201, a vertical conversion unit 202, a horizontal next-generation signal extraction unit 208, a vertical next-generation signal extraction unit 209, a horizontal current signal extraction unit 210, and a vertical current signal extraction unit 211. In addition, the receiving device 200 includes a horizontal next-generation transmission channel estimation unit 212, a vertical next-generation transmission channel estimation unit 213, a horizontal current transmission channel estimation unit 214, a vertical current transmission channel estimation unit 215, a horizontal first transmission channel extraction unit 216, and a horizontal second transmission channel extraction unit 217. Furthermore, the receiving device 200 includes a vertical first transmission channel extraction unit 218, a vertical second transmission channel extraction unit 219, a horizontal estimation accuracy improvement unit 220, a vertical estimation accuracy improvement unit 221, and a demodulation unit 207. In the third embodiment, as in the first embodiment, as an example, a case will be described in which the receiving device 200 is configured to receive a 4K signal.

[0089] The horizontal side conversion unit 201 generates a horizontal side received signal by performing, for example, a Fourier transform operation on the signal input from the receiving side horizontal antenna 200a. Then, the horizontal side conversion unit 201 outputs the generated horizontal side received signal to the horizontal side next generation signal extraction unit 208, the horizontal side current signal extraction unit 210, and the demodulation unit 207. The vertical side transform unit 202 generates a vertical side received signal by performing, for example, a Fourier transform operation on the signal input from the receiving side vertical antenna 200b. Then, the vertical side transform unit 202 outputs the generated vertical side received signal to the vertical side next generation signal extraction unit 209, the vertical side current signal extraction unit 211, and the demodulation unit 207.

[0090] The horizontal side next-generation signal extraction unit 208 extracts a next-generation SP signal and an inverted SP signal from the horizontal side received signal input from the horizontal side conversion unit 201. Then, the extracted next-generation SP signal and inverted SP signal are output to the horizontal side next-generation transmission channel estimation unit 212. The vertical-side next-generation signal extraction unit 209 extracts a next-generation SP signal and an inverted SP signal from the vertical-side received signal input from the vertical-side conversion unit 202. Then, the extracted next-generation SP signal and inverted SP signal are output to the vertical-side next-generation transmission channel estimation unit 213.

[0091] The horizontal side current signal extraction unit 210 extracts a current SP signal and a NULL signal from the horizontal side received signal input from the horizontal side conversion unit 201. Then, the horizontal side current signal extraction unit 210 outputs the extracted current SP signal and NULL signal to the horizontal side current transmission channel estimation unit 214. The vertical-side current signal extraction unit 211 extracts a current SP signal and a NULL signal from the vertical-side received signal input from the vertical-side conversion unit 202. Then, the vertical-side current signal extraction unit 211 outputs the extracted current SP signal and NULL signal to the vertical-side current transmission channel estimation unit 215.

[0092] The horizontal-side next-generation transmission channel estimator 212 estimates the transmission channel response h hh and the transmission line response h vh Estimate. First, among the signals input from the receiving horizontal antenna 200a, the next-generation SP signal received from the transmitting horizontal antenna 100a and the next-generation SP signal received from the transmitting vertical antenna 100b, which are located at the same position, are referred to as "P sum ". Furthermore, the next generation SP signal is defined as "p" and "P sum =ph hh +ph vh " is defined as the relation:

[0093] Next, the next-generation SP signal received from the transmitting-side horizontal antenna 100a and the inverted SP signal received from the transmitting-side vertical antenna 100b, which are arranged in the same position, are called "P diff ". Furthermore, the next generation SP signal is defined as "p" and "P diff =ph hh -ph vh " is defined as the relation: And the signal P sum and signal P diff By interpolating each of the above in the direction of elapsed time and the direction of frequency, the signal P sum and signal P diff Calculate.

[0094] Here, the relation "P sum =ph hh+ph vh " and the relation "P diff =ph hh -ph vh "The unknown variable is the transmission line response h hh and the transmission line response h vh Therefore, by solving these two equations as simultaneous equations, the transmission channel response h hh and the transmission line response h vh Estimate. Estimated channel response h vh is output to the horizontal-side first transmission channel extraction unit 216. On the other hand, the estimated transmission channel response h hh is output to the horizontal-side second transmission path extraction unit 217.

[0095] The vertical-side next-generation transmission channel estimator 213 estimates the transmission channel response h hv and the transmission line response h vv Estimate. First, among the signals input from the receiving vertical antenna 200b, the next-generation SP signal received from the transmitting horizontal antenna 100a and the next-generation SP signal received from the transmitting vertical antenna 100b, which are located at the same position, are referred to as "P sum ". Furthermore, the next generation SP signal is defined as "p" and "P sum =ph hv +ph vv " is defined as the relation:

[0096] Next, the next-generation SP signal received from the transmitting-side horizontal antenna 100a and the inverted SP signal received from the transmitting-side vertical antenna 100b, which are arranged in the same position, are called "P diff ". Furthermore, the next generation SP signal is defined as "p" and "P diff =ph hv -ph vv " is defined as the relation: And the signal P sum and signal P diff By interpolating each of the above in the direction of elapsed time and the direction of frequency, the signal P sum and signal P diff Calculate.

[0097] Here, the relation "P sum =ph hv +ph vv " and the relation "P diff =ph hv -ph vv "The unknown variable is the transmission line response h hv and the transmission line response h vv Therefore, by solving these two equations as simultaneous equations, the transmission channel response h hv and the transmission line response h vv Estimate. Estimated channel response h vv is output to the vertical-side first transmission channel extraction unit 218. On the other hand, the estimated transmission channel response h hv is output to the vertical-side second transmission path extraction unit 219.

[0098] Therefore, the horizontal side next-generation transmission channel estimation unit 212 and the vertical side next-generation transmission channel estimation unit 213 estimate the transmission channel response using a signal in which the next-generation SP signal contained in the data signal transmitted with horizontal polarization and the next-generation SP signal contained in the data signal transmitted with vertical polarization are arranged at the same position, and a signal in which the next-generation SP signal contained in the data signal transmitted with horizontal polarization and the inverted SP signal contained in the data signal transmitted with vertical polarization are arranged at the same position.

[0099] The horizontal side current transmission channel estimation unit 214 uses the current SP signal and the NULL signal input from the horizontal side current signal extraction unit 210 to obtain the transmission channel response of the current SP signal inserted at regular intervals in the time axis direction (direction of elapsed time) and frequency axis direction (direction of frequency change). Furthermore, it performs interpolation processing in the time axis direction and frequency axis direction. In this way, the horizontal side virtual transmission channel response h' is obtained by obtaining the transmission channel response of the horizontal side data signal. hh Then, the horizontal-side current transmission channel estimating unit 214 estimates the estimated horizontal-side virtual transmission channel response h' hh to the horizontal side estimation accuracy improving unit 220. The vertical side current transmission channel estimation unit 215 uses the current SP signal and the NULL signal input from the vertical side current signal extraction unit 211 to obtain the transmission channel response of the current SP signal inserted at regular intervals in the time axis direction and the frequency axis direction. Furthermore, it performs an interpolation process in the time axis direction and the frequency axis direction. In this way, the vertical side virtual transmission channel response h' is obtained by obtaining the transmission channel response of the vertical side data signal. hv Then, the vertical side current transmission channel estimating unit 215 estimates the estimated vertical side virtual transmission channel response h' hv to the vertical side estimation accuracy improving unit 221.

[0100] Therefore, the horizontal side current transmission channel estimation unit 214 and the vertical side current transmission channel estimation unit 215 estimate the transmission channel response using the current SP signal contained in the data signal transmitted with horizontal polarization and the NULL signal contained in the data signal transmitted with vertical polarization.

[0101] The horizontal-side first transmission channel extraction unit 216 extracts the transmission channel response h vh and outputs it to the demodulation unit 207. The horizontal-side second transmission channel extraction unit 217 extracts the transmission channel response h hh and outputs it to the horizontal side estimation accuracy improving unit 220.

[0102] The vertical-side first transmission channel extraction unit 218 extracts the transmission channel response h vv and outputs it to the demodulation unit 207. The vertical-side second transmission channel extraction unit 219 extracts the transmission channel response h hv and outputs it to the vertical side estimation accuracy improving unit 221.

[0103] The horizontal side estimation accuracy improving unit 220 estimates the horizontal side virtual channel response h′ input from the horizontal side current channel estimating unit 214. hh and the transmission channel response h input from the horizontal side second transmission channel extraction unit 217. hh Using this, the horizontal side accuracy improvement transmission line response h'' hhCalculate the horizontal accuracy improvement transmission line response h'' hh is the transmission line response h hh The horizontal-side estimation accuracy improving unit 220 then calculates the horizontal-side accuracy-improved transmission channel response h''. hh is output to the demodulation unit 207.

[0104] Below, the horizontal side estimation accuracy improvement unit 220 calculates the horizontal side accuracy improvement transmission path response h'' hh A specific method for calculating the above will be described. Horizontal accuracy improvement transmission line response h'' hh For example, the method for calculating h'' hh =(h hh +h' hh ) / 2, the horizontal virtual transmission line response h' hh and the transmission line response h hh It is possible to use a method of calculating the average value of

[0105] Also, for example, h'' hh =(w1h hh +w2h' hh By using the formula (w1+w2), it is possible to use a method of calculating a weighted average value by weighting with coefficients w1 and w2. As an index of weighting, for example, it is possible to use a method of increasing the weight of the coefficient as the transmission channel response input to the horizontal side estimation accuracy improving unit 220 approaches the SP signal (current SP signal, next-generation SP signal) used for the interpolation of the corresponding transmission channel. Normally, the received signal contains noise such as additive white Gaussian noise (AWGN), so the estimated channel response also contains noise. hh and the horizontal virtual transmission line response h' hh Although the results are basically the same as the estimation of the channel response, the degree of noise contamination differs because the channel response is estimated from a different SP signal. For this reason, the horizontal accuracy improvement channel response h'' hh It is now possible to improve the estimation accuracy of the

[0106] The vertical side estimation accuracy improving unit 221 estimates the vertical side virtual channel response h′ input from the vertical side current channel estimating unit 215. hv and the transmission channel response h input from the vertical side second transmission channel extraction unit 219. hv Using this, the vertical side precision improvement transmission line response h'' hv Calculate the vertical accuracy improvement transmission line response h'' hv is the transmission line response h hv The vertical side estimation accuracy improving unit 221 then calculates the vertical side accuracy improved channel response h''. hv is output to demodulation section 207.

[0107] Hereinafter, the vertical side estimation accuracy improvement unit 221 calculates the vertical side accuracy improved channel response h'' hv A specific method for calculating the above will be described. Vertical accuracy improvement transmission line response h'' hv For example, the method for calculating h'' hv =(h hv +h' hv ) / 2, the vertical virtual transmission line response h' hv and the transmission line response h hv It is possible to use a method of calculating the average value of

[0108] Also, for example, h'' hv =(w1h hv +w2h' hv By using the calculation formula (w1+w2), it is possible to use a method of calculating a weighted average value by weighting with coefficients w1 and w2. As an index of weighting, for example, it is possible to use a method of increasing the weight of the coefficient as the transmission channel response input to the vertical side estimation accuracy improving unit 221 approaches the SP signal (current SP signal, next-generation SP signal) used for the interpolation of the corresponding transmission channel. Usually, noise such as additive white Gaussian noise is mixed into the received signal, so the estimated channel response also contains noise. hv and the vertical virtual channel response h' hvAlthough the above results are basically the same channel response estimates, the degree of noise contamination differs because the channel response is estimated from a different SP signal. For this reason, the vertical accuracy improvement channel response h'' hv It is now possible to improve the estimation accuracy of the

[0109] The demodulator 207 multiplies the received signal R1 and the received signal R2 by the inverse matrix of the channel response matrix, as in the above-mentioned relational expression (1). In the third embodiment, the channel response matrix is ​​the inverse matrix of the channel response h'' hh , the channel response h vh , transmission line response h'' hv , the channel response h vv That is, in the third embodiment, the matrix formed by "h hh " to "h'' hh " and "h hv " to "h'' hv " and perform the calculation. As a result, demodulation unit 207 demodulates transmission signal S1 and transmission signal S2. Then, demodulation unit 207 outputs the demodulated transmission signal S1 and transmission signal S2 to application device 3. Note that transmission signal S1 and transmission signal S2 include a broadcast data signal, a TMCC signal, and an AC signal transmitted with horizontal polarization, and a broadcast data signal, a TMCC signal, and an AC signal transmitted with vertical polarization. Therefore, the demodulator 207 receives the horizontal-side accuracy-improved channel response h″ calculated by the horizontal-side estimation accuracy improving unit 220. hh and the vertical-side accuracy-improved channel response h″ calculated by the vertical-side estimation accuracy improving unit 221. hv is used to demodulate the data signal received via the transmission line 300.

[0110] <Correspondence to claims> In the third embodiment, the horizontal polarization corresponds to one of the horizontal polarization and the vertical polarization, the horizontal side data signal corresponds to the first data signal, the horizontal side symbol signal corresponds to the first symbol signal, and the horizontal side symbol generator 102 corresponds to the first symbol generator. In the third embodiment, the vertical polarization corresponds to the other of the horizontal polarization and the vertical polarization, the vertical side data signal corresponds to the second data signal, the vertical side symbol signal corresponds to the second symbol signal, and the vertical side symbol generator 103 corresponds to the second symbol generator.

[0111] <Actions and Effects of the Third Embodiment> The receiving device 200 of the third embodiment can provide the following functions and effects. (1) The horizontal side next-generation transmission channel estimation unit 212 and the vertical side next-generation transmission channel estimation unit 213 estimate a transmission channel response using a signal in which the next-generation SP signal contained in the data signal transmitted with horizontal polarization and the next-generation SP signal contained in the data signal transmitted with vertical polarization are arranged at the same position, and a signal in which the next-generation SP signal contained in the data signal transmitted with horizontal polarization and the inverted SP signal contained in the data signal transmitted with vertical polarization are arranged at the same position. Also, the horizontal side current transmission channel estimation unit 214 and the vertical side current transmission channel estimation unit 215 estimate a transmission channel response using the current SP signal contained in the data signal transmitted with horizontal polarization and the NULL signal contained in the data signal transmitted with vertical polarization. In addition to this, the horizontal side estimation accuracy improvement unit 220 estimates a horizontal side accuracy improved transmission channel response h'' hh and the vertical side estimation accuracy improving unit 221 calculates the vertical side accuracy improved channel response h'' hv Furthermore, the demodulator 207 calculates the horizontal side accuracy improved channel response h'' calculated by the horizontal side estimation accuracy improving unit 220. hh and the vertical-side accuracy-improved channel response h″ calculated by the vertical-side estimation accuracy improving unit 221. hv is used to demodulate the data signal received via the transmission line 300. As a result, even in the case of a code inversion method, the estimation accuracy of the transmission path response is improved by using the current SP signal, so it is possible to provide a receiving device 200 that can reduce poor reception by improving reception performance compared to when the current SP signal is not used.

[0112] The present technology can be configured as follows. (1) A transmitting device that transmits a data signal by orthogonally transmitting horizontally polarized waves and vertically polarized waves, a pilot signal generating unit for generating a current SP signal used in a preset broadcasting system, a next-generation SP signal used in a system newer than the preset broadcasting system, and a NULL signal whose power is set to 0; a first symbol generating unit that generates a first symbol signal by arranging the current SP signal and the next-generation SP signal generated by the pilot signal generating unit and a broadcast data signal that is included in the first data signal and corresponds to the content to be broadcast, along the direction of elapsed time and the direction of frequency change, for a first data signal to be transmitted in one of the horizontally polarized wave and the vertically polarized wave; a second symbol generating unit that generates a second symbol signal by arranging the next generation SP signal and the NULL signal generated by the pilot signal generating unit and a broadcast data signal included in the second data signal and corresponding to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a second data signal to be transmitted by the other of the horizontally polarized wave and the vertically polarized wave; A transmitting device in which the second symbol generating unit generates the second symbol signal by placing the NULL signal in the position where the first symbol generating unit placed the current SP signal. (2) The first data signal further includes a TMCC signal which is a transmission control information signal including transmission parameter information; The transmitting device according to (1), wherein the second symbol generating unit generates the second symbol signal by placing the NULL signal at a position where the first symbol generating unit placed the TMCC signal. (3) The first data signal further includes a TMCC signal which is a transmission control information signal including transmission parameter information; The transmitting device described in (1) above, wherein the second symbol generation unit generates the second symbol signal by placing the broadcast data signal at the position where the first symbol generation unit placed the TMCC signal. (4) The first data signal further includes an AC signal that is an auxiliary information signal containing information related to the emergency earthquake warning, The transmitting device according to any one of (1) to (3), wherein the second symbol generating unit generates the second symbol signal by placing the NULL signal at the position where the first symbol generating unit placed the AC signal. (5) The first data signal further includes an AC signal that is an auxiliary information signal containing information related to the emergency earthquake warning, A transmitting device according to any one of (1) to (3), wherein the second symbol generating unit generates the second symbol signal by placing the broadcast data signal at the position where the first symbol generating unit placed the AC signal. (6) The pilot signal generating unit further generates an inverted SP signal by inverting the sign of the next-generation SP signal, The transmitting device according to any one of (1) to (5), wherein the second symbol generating unit further generates the second symbol signal by placing the inverted SP signal generated by the pilot signal generating unit in a portion of the position where the first symbol generating unit placed the next-generation SP signal. (7) the first data signal is a horizontal side data signal to be transmitted by the horizontally polarized wave, The transmitting device according to any one of (1) to (6), wherein the second data signal is a vertical side data signal for transmitting by the vertical polarization. (8) the first data signal is a vertical side data signal to be transmitted using the vertical polarization, The transmitting device according to any one of (1) to (6), wherein the second data signal is a horizontal side data signal for transmitting by the horizontally polarized wave. (9) A transmitting device that transmits a data signal by orthogonally transmitting horizontally polarized waves and vertically polarized waves, a pilot signal generating unit for generating a current SP signal used in a preset broadcasting system, a next-generation SP signal used in a system newer than the preset broadcasting system, and a NULL signal whose power is set to 0; a first symbol generating unit that generates a first symbol signal by arranging the current SP signal and the NULL signal generated by the pilot signal generating unit and a broadcast data signal that is included in the first data signal and corresponds to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a first data signal to be transmitted in one of the horizontally polarized wave and the vertically polarized wave; a second symbol generating unit that generates a second symbol signal by arranging the next generation SP signal and the NULL signal generated by the pilot signal generating unit and a broadcast data signal included in the second data signal and corresponding to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a second data signal to be transmitted by the other of the horizontally polarized wave and the vertically polarized wave; A transmitting device in which the second symbol generation unit generates the second symbol signal by placing the NULL signal in the position where the first symbol generation unit placed the current SP signal, and by placing the next-generation SP signal in the position where the first symbol generation unit placed the NULL signal. (10) The first data signal further includes a TMCC signal which is a transmission control information signal including transmission parameter information; The transmitting device according to (9), wherein the second symbol generating unit generates the second symbol signal by placing the NULL signal at a position where the first symbol generating unit placed the TMCC signal. (11) The first data signal further includes a TMCC signal which is a transmission control information signal including transmission parameter information; The transmitting device described in (9) above, wherein the second symbol generating unit generates the second symbol signal by placing the broadcast data signal at the position where the first symbol generating unit placed the TMCC signal. (12) The first data signal further includes an AC signal that is an auxiliary information signal containing information related to the emergency earthquake warning, The transmitting device according to any one of (9) to (11), wherein the second symbol generating unit generates the second symbol signal by placing the NULL signal at a position where the first symbol generating unit placed the AC signal. (13) The first data signal further includes an AC signal that is an auxiliary information signal containing information related to the emergency earthquake warning, The transmitting device according to any one of (9) to (11), wherein the second symbol generating unit generates the second symbol signal by placing the broadcast data signal at the position where the first symbol generating unit placed the AC signal. (14) the first data signal is a horizontal side data signal to be transmitted by the horizontally polarized wave, The transmitting device according to any one of (9) to (13), wherein the second data signal is a vertical side data signal for transmitting by the vertically polarized wave. (15) the first data signal is a vertical side data signal to be transmitted using the vertical polarization, The transmitting device according to any one of (9) to (13), wherein the second data signal is a horizontal side data signal for transmitting by the horizontally polarized wave. (16) A receiving device that receives a data signal transmitted from a transmitting device and formed by orthogonally crossing a horizontally polarized wave and a vertically polarized wave via a plurality of transmission paths having different transmission path responses, comprising: the data signal transmitted from the transmitting device includes a next-generation SP signal used in a system newer than a preset broadcasting system, and an inverted SP signal obtained by inverting the sign of the next-generation SP signal, The data signal included in the horizontally polarized wave includes the next-generation SP signal arranged along the direction of time elapse and the direction of frequency change, The data signal included in the vertical polarization includes the next generation SP signal and the inverted SP signal arranged along the direction of time elapse and the direction of frequency change, a transmission path estimating unit that estimates the transmission path response using a signal in which the next-generation SP signal included in the data signal transmitted with the horizontal polarization and the next-generation SP signal included in the data signal transmitted with the vertical polarization are arranged at the same position among the data signals formed by orthogonalizing, and a signal in which the next-generation SP signal included in the data signal transmitted with the horizontal polarization and the inverted SP signal included in the data signal transmitted with the vertical polarization are arranged at the same position; a demodulation unit that demodulates the data signal received via the transmission path by using the transmission path response estimated by the transmission path estimation unit. (17) A receiving device that receives a data signal transmitted from a transmitting device and formed by orthogonally crossing a horizontally polarized wave and a vertically polarized wave via a plurality of transmission paths having different transmission path responses, comprising: The data signal transmitted from the transmitting device includes a current SP signal used in a preset broadcasting system, a next-generation SP signal used in a system newer than the preset broadcasting system, and a NULL signal that sets power to 0; The data signal included in the horizontally polarized wave includes the current SP signal and the NULL signal arranged along the direction of time elapse and the direction of frequency change; The data signal included in the vertical polarization includes the next generation SP signal and the NULL signal arranged along the direction of time elapse and the direction of frequency change, A transmission path estimating unit that estimates the transmission path response using a signal in which the current SP signal included in the data signal transmitted by the horizontal polarization and the NULL signal included in the data signal transmitted by the vertical polarization are arranged at the same position among the data signals formed by orthogonalizing, and a signal in which the NULL signal included in the data signal transmitted by the horizontal polarization and the next-generation SP signal included in the data signal transmitted by the vertical polarization are arranged at the same position; a demodulation unit that demodulates the data signal received via the transmission path by using the transmission path response estimated by the transmission path estimation unit. (18) A receiving device that receives a data signal transmitted from a transmitting device and formed by orthogonally crossing a horizontally polarized wave and a vertically polarized wave via a plurality of transmission paths having different transmission path responses, comprising: The data signal transmitted from the transmitting device includes a current SP signal used in a preset broadcasting method, a next-generation SP signal used in a method newer than the preset broadcasting method, an inverted SP signal obtained by inverting the sign of the next-generation SP signal, and a NULL signal that sets power to 0; The data signal included in the horizontally polarized wave includes the current SP signal and the next-generation SP signal arranged along a direction of time elapse and a direction of frequency change, The data signal included in the vertical polarization includes the next generation SP signal, the inverted SP signal, and the NULL signal, which are arranged along the direction of time elapse and the direction of frequency change; a next-generation transmission channel estimating unit that estimates the transmission channel response using a signal in which the next-generation SP signal contained in the data signal transmitted with the horizontal polarization and the next-generation SP signal contained in the data signal transmitted with the vertical polarization are arranged at the same position among the data signals formed by orthogonalizing, and a signal in which the next-generation SP signal contained in the data signal transmitted with the horizontal polarization and the inverted SP signal contained in the data signal transmitted with the vertical polarization are arranged at the same position; a current transmission channel estimating unit that estimates the transmission channel response using the current SP signal and the NULL signal included in the data signal transmitted by the horizontal polarization; an estimation accuracy improvement unit that calculates an improved channel response, which is a channel response obtained by improving the estimation accuracy of the channel response, using the channel response estimated by the next-generation channel estimation unit and the channel response estimated by the current channel estimation unit; A receiving device comprising: a demodulation unit that demodulates the data signal received via the transmission path using the accuracy-improved transmission path response calculated by the estimation accuracy improvement unit. (19) A transmission / reception system including a transmission device that transmits a data signal by orthogonally intersecting horizontally polarized waves and vertically polarized waves, and a reception device that receives the data signal from the transmission device via a transmission path, The transmitting device a pilot signal generating unit that generates a current SP signal used in a preset broadcasting method, a next-generation SP signal used in a method newer than the preset broadcasting method, an inverted SP signal obtained by inverting the sign of the next-generation SP signal, and a NULL signal that sets power to 0; a first symbol generating unit that generates a first symbol signal by arranging the current SP signal and the next-generation SP signal generated by the pilot signal generating unit and a broadcast data signal that is included in the first data signal and corresponds to the content to be broadcast, along the direction of elapsed time and the direction of frequency change, for a first data signal to be transmitted in one of the horizontally polarized wave and the vertically polarized wave; a second symbol generating unit that generates a second symbol signal by arranging the next generation SP signal, the inverted SP signal, and the NULL signal generated by the pilot signal generating unit, and a broadcast data signal included in the second data signal and corresponding to the content to be broadcast, along a direction in which time elapses and a direction in which frequency changes, for a second data signal to be transmitted by the other of the horizontally polarized wave and the vertically polarized wave; A transmission / reception system in which the second symbol generating unit generates the second symbol signal by placing the NULL signal at a position where the first symbol generating unit placed the current SP signal. (20) A transmission / reception system including a transmission device that transmits a data signal by orthogonally intersecting horizontally polarized waves and vertically polarized waves, and a reception device that receives the data signal from the transmission device via a transmission path, The transmitting device a pilot signal generating unit for generating a current SP signal used in a preset broadcasting system, a next-generation SP signal used in a system newer than the preset broadcasting system, and a NULL signal whose power is set to 0; a first symbol generating unit that generates a first symbol signal by arranging the current SP signal and the NULL signal generated by the pilot signal generating unit and a broadcast data signal that is included in the first data signal and corresponds to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a first data signal to be transmitted in one of the horizontally polarized wave and the vertically polarized wave; a second symbol generating unit that generates a second symbol signal by arranging the next generation SP signal and the NULL signal generated by the pilot signal generating unit and a broadcast data signal included in the second data signal and corresponding to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a second data signal to be transmitted by the other of the horizontally polarized wave and the vertically polarized wave; A transmission / reception system in which the second symbol generation unit generates the second symbol signal by placing the NULL signal in the position where the first symbol generation unit placed the current SP signal, and by placing the next-generation SP signal in the position where the first symbol generation unit placed the NULL signal. [Explanation of symbols]

[0113] 1...transmission / reception system, 2...antenna, 3...application device, 100...transmitting device, 100a...transmitting-side horizontal antenna, 100b...transmitting-side vertical antenna, 101...pilot signal generation unit, 102...horizontal-side symbol generation unit, 103...vertical-side symbol generation unit, 104...horizontal-side inverse conversion unit, 105...vertical-side inverse conversion unit, 200...receiving device, 200a...receiving-side horizontal antenna, 200b...receiving-side vertical antenna, 201...horizontal-side conversion unit, 202...vertical-side conversion unit, 203...horizontal-side signal extraction unit, 204...vertical-side signal extraction unit, 205...horizontal-side transmission path estimation unit, 206...vertical horizontal side transmission channel estimation unit, 207... demodulation unit, 208... horizontal side next generation signal extraction unit, 209... vertical side next generation signal extraction unit, 210... horizontal side current signal extraction unit, 211... vertical side current signal extraction unit, 212... horizontal side next generation transmission channel estimation unit, 213... vertical side next generation transmission channel estimation unit, 214... horizontal side current transmission channel estimation unit, 215... vertical side current transmission channel estimation unit, 216... horizontal side first transmission channel extraction unit, 217... horizontal side second transmission channel extraction unit, 218... vertical side first transmission channel extraction unit, 219... vertical side second transmission channel extraction unit, 220... horizontal side estimation accuracy improvement unit, 221... vertical side estimation accuracy improvement unit, 300... transmission channel

Claims

1. A transmitting device that transmits a data signal by orthogonally transmitting horizontally polarized waves and vertically polarized waves, a pilot signal generating unit that generates a current SP signal used in a preset broadcasting system, a next-generation SP signal used in a system newer than the preset broadcasting system, and a NULL signal that sets power to 0; a first symbol generating unit that generates a first symbol signal by arranging the current SP signal and the next generation SP signal generated by the pilot signal generating unit and a broadcast data signal that is included in the first data signal and corresponds to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a first data signal to be transmitted in one of the horizontally polarized wave and the vertically polarized wave; a second symbol generating unit that generates a second symbol signal by arranging the next generation SP signal and the NULL signal generated by the pilot signal generating unit and a broadcast data signal included in the second data signal and corresponding to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a second data signal to be transmitted by the other of the horizontally polarized wave and the vertically polarized wave; the second symbol generating unit generates the second symbol signal by placing the NULL signal at a position where the first symbol generating unit placed the current SP signal; The first data signal further includes a TMCC signal which is a transmission control information signal including transmission parameter information; A transmitting device, wherein the second symbol generating unit generates the second symbol signal by arranging the broadcast data signal at a position where the first symbol generating unit arranged the TMCC signal.

2. A transmitting device for transmitting a data signal by orthogonally transmitting horizontally polarized waves and vertically polarized waves, comprising: a pilot signal generating unit that generates a current SP signal used in a preset broadcasting system, a next-generation SP signal used in a system newer than the preset broadcasting system, and a NULL signal that sets power to 0; a first symbol generating unit that generates a first symbol signal by arranging the current SP signal and the next generation SP signal generated by the pilot signal generating unit and a broadcast data signal that is included in the first data signal and corresponds to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a first data signal to be transmitted in one of the horizontally polarized wave and the vertically polarized wave; a second symbol generating unit that generates a second symbol signal by arranging the next generation SP signal and the NULL signal generated by the pilot signal generating unit and a broadcast data signal included in the second data signal and corresponding to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a second data signal to be transmitted by the other of the horizontally polarized wave and the vertically polarized wave; the second symbol generating unit generates the second symbol signal by placing the NULL signal at a position where the first symbol generating unit placed the current SP signal; The first data signal further includes an AC signal that is an auxiliary information signal containing information related to the emergency earthquake warning, A transmitting device in which the second symbol generating unit generates the second symbol signal by arranging the broadcast data signal at the position where the first symbol generating unit arranged the AC signal.

3. The pilot signal generating unit further generates an inverted SP signal by inverting the sign of the next-generation SP signal, The transmitting device according to claim 1 or 2, wherein the second symbol generating unit further generates the second symbol signal by placing the inverted SP signal generated by the pilot signal generating unit in a portion of the position where the first symbol generating unit placed the next-generation SP signal.

4. 3. The transmitting device according to claim 1, wherein when the first data signal is a horizontal side data signal for transmission using the horizontal polarization, the second data signal is a vertical side data signal for transmission using the vertical polarization.

5. 3. The transmitting device according to claim 1, wherein when the first data signal is a vertical side data signal for transmission using the vertical polarization, the second data signal is a horizontal side data signal for transmission using the horizontal polarization.

6. A transmitting device for transmitting a data signal by orthogonalizing horizontally polarized waves and vertically polarized waves, comprising: a pilot signal generating unit that generates a current SP signal used in a preset broadcasting system, a next-generation SP signal used in a system newer than the preset broadcasting system, and a NULL signal that sets power to 0; a first symbol generating unit that generates a first symbol signal by arranging the current SP signal and the NULL signal generated by the pilot signal generating unit and a broadcast data signal included in the first data signal and corresponding to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a first data signal to be transmitted in one of the horizontally polarized wave and the vertically polarized wave; a second symbol generating unit that generates a second symbol signal by arranging the next generation SP signal and the NULL signal generated by the pilot signal generating unit and a broadcast data signal included in the second data signal and corresponding to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a second data signal to be transmitted by the other of the horizontally polarized wave and the vertically polarized wave; the second symbol generation unit generates the second symbol signal by arranging the NULL signal at the position where the first symbol generation unit arranged the current SP signal, and arranging the next-generation SP signal at the position where the first symbol generation unit arranged the NULL signal; The first data signal further includes a TMCC signal which is a transmission control information signal including transmission parameter information; A transmitting device, wherein the second symbol generating unit generates the second symbol signal by arranging the broadcast data signal at a position where the first symbol generating unit arranged the TMCC signal.

7. A transmitting device for transmitting a data signal by orthogonalizing horizontally polarized waves and vertically polarized waves, comprising: a pilot signal generating unit that generates a current SP signal used in a preset broadcasting system, a next-generation SP signal used in a system newer than the preset broadcasting system, and a NULL signal that sets power to 0; a first symbol generating unit that generates a first symbol signal by arranging the current SP signal and the NULL signal generated by the pilot signal generating unit and a broadcast data signal included in the first data signal and corresponding to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a first data signal to be transmitted in one of the horizontally polarized wave and the vertically polarized wave; a second symbol generating unit that generates a second symbol signal by arranging the next generation SP signal and the NULL signal generated by the pilot signal generating unit and a broadcast data signal included in the second data signal and corresponding to the content to be broadcast along a direction in which time elapses and a direction in which a frequency changes, for a second data signal to be transmitted by the other of the horizontally polarized wave and the vertically polarized wave; the second symbol generation unit generates the second symbol signal by arranging the NULL signal at the position where the first symbol generation unit arranged the current SP signal, and arranging the next-generation SP signal at the position where the first symbol generation unit arranged the NULL signal; The first data signal further includes an AC signal that is an auxiliary information signal containing information related to the emergency earthquake warning, A transmitting device in which the second symbol generating unit generates the second symbol signal by arranging the broadcast data signal at the position where the first symbol generating unit arranged the AC signal.

8. 8. The transmitting device according to claim 6 or 7, wherein when the first data signal is a horizontal side data signal for transmission using the horizontal polarization, the second data signal is a vertical side data signal for transmission using the vertical polarization.

9. 8. The transmitting device according to claim 6 or 7, wherein when the first data signal is a vertical side data signal for transmission using the vertical polarization, the second data signal is a horizontal side data signal for transmission using the horizontal polarization.

10. A receiving device that receives a data signal transmitted from a transmitting device and formed by orthogonally crossing a horizontally polarized wave and a vertically polarized wave via a plurality of transmission paths having different transmission path responses, comprising: The data signal transmitted from the transmitting device includes a current SP signal used in a preset broadcasting system, a next-generation SP signal used in a system newer than the preset broadcasting system, an inverted SP signal obtained by inverting the sign of the next-generation SP signal, and a NULL signal that sets power to 0; The data signal included in the horizontally polarized wave includes the current SP signal and the next-generation SP signal arranged along a direction of time elapse and a direction of frequency change, The data signal included in the vertically polarized wave includes the next generation SP signal, the inverted SP signal, and the NULL signal, which are arranged along the direction of time elapse and the direction of frequency change; a next-generation transmission channel estimating unit that estimates the transmission channel response using a signal in which the next-generation SP signal contained in the data signal transmitted with the horizontal polarization and the next-generation SP signal contained in the data signal transmitted with the vertical polarization are arranged at the same position among the data signals formed by orthogonalizing, and a signal in which the next-generation SP signal contained in the data signal transmitted with the horizontal polarization and the inverted SP signal contained in the data signal transmitted with the vertical polarization are arranged at the same position; a current transmission channel estimating unit that estimates the transmission channel response using the current SP signal and the NULL signal included in the data signal transmitted by the horizontally polarized wave; an estimation accuracy improvement unit that calculates an improved channel response, which is a channel response obtained by improving the estimation accuracy of the channel response, using the channel response estimated by the next-generation channel estimation unit and the channel response estimated by the current channel estimation unit; A receiving device comprising: a demodulation unit that demodulates the data signal received via the transmission path using the accuracy-improved transmission path response calculated by the estimation accuracy improvement unit.

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