JP6366915B2 - Transmitting device, receiving device and chip - Google Patents

Description

  The present invention relates to a transmission device, a reception device, and a chip.

  In the ISDB-T (Integrated Services Digital Broadcasting-Terrestrial) system, which is a terrestrial digital broadcasting system in Japan, a transmission apparatus is configured to transmit a signal using a single transmission antenna. It is configured to receive a signal using a single receiving antenna (see Non-Patent Document 1).

  In the next-generation terrestrial digital broadcasting system, a method of increasing a transmission capacity and a method of improving transmission tolerance using a MIMO (Multiple Input Multiple Output) transmission system or a MISO (Multiple Input Single Output) transmission system using a plurality of transmission / reception antennas. (See Non-Patent Documents 2 and 3).

  Also, overseas, a terrestrial digital broadcasting system using the MISO transmission system is standardized (see Non-Patent Document 4).

ARIB STD-B31 Murayama et al., “Transmission technology for next-generation terrestrial broadcasting -SHV transmission experiment using two channels of UHF band-", ITE Technical Report vol.36, no.30, BCT2012-64, 2012, p. .17-20 Naruyoshi et al., “Fundamental study on MIMO-OFDM transmission system using orthogonalized scattered pilot”, IEICE Technical Report vol.35, no.41, BCT2011-77, 2011, p.49-52 ETSI EN 302 755

  In the ISDB-T system, services with different transmission parameters at the maximum, such as transmitting a signal for fixed reception service in a part of one television channel and transmitting a signal for mobile reception service in the rest. Hierarchical transmission has been introduced that can divide the transmission signal into hierarchies.

  However, the ISDB-T system is configured to perform such hierarchical transmission only in a transmission system using one transmission antenna and one reception antenna. In the MIMO transmission system and the MISO transmission system, There is a problem that such hierarchical transmission cannot be performed.

  In addition, the current standard for digital terrestrial broadcasting systems in foreign countries stipulates that the MISO transmission system is used, but there is a problem that the use of the MIMO transmission system is not specified.

  Furthermore, the MIMO transmission scheme is different from the space division multiplexing (SDM) scheme in which the transmission capacity is expanded by assigning different data to a plurality of transmission antennas, and different encoding is performed from the plurality of transmission antennas. And space time coding (STC) scheme that improves transmission tolerance by transmitting the same data.

  Here, in the next-generation digital terrestrial broadcasting system, as in the above-described hierarchical transmission, from a service signal that provides large-capacity video data to a service signal that provides high-resistance data with a small capacity, It is desirable to implement in one television channel.

  Therefore, the present invention has been made in view of the above-described problems, and an object thereof is to provide a transmission device, a reception device, and a chip that can realize hierarchical transmission in the MIMO transmission scheme.

  A first feature of the present invention is a transmission apparatus, a layer division unit configured to divide an input signal into a plurality of layers, spatial multiplexing processing for signals belonging to each layer, and The gist is to include a processing unit configured to perform either of the space-time encoding processing.

  A second feature of the present invention is a receiving device, a layer separating unit configured to separate a transmission signal transmitted by a transmitting device into signals belonging to a plurality of layers, and a signal belonging to each layer. The gist of the invention is that it includes a processing unit configured to perform either spatial demultiplexing processing or spatio-temporal decoding processing.

  A third feature of the present invention is a chip mounted on a receiving device, which is configured to separate a transmission signal transmitted by a transmitting device into signals belonging to a plurality of layers, and The gist is to include a processing unit configured to perform either spatial demultiplexing processing or spatio-temporal decoding processing on a signal belonging to a hierarchy.

  As described above, according to the present invention, it is possible to provide a transmitter, a receiver, and a chip that can realize hierarchical transmission in the MIMO transmission scheme.

It is a functional block diagram of the transmission apparatus which concerns on the 1st Embodiment of this invention. It is a functional block diagram of a processing unit and a frequency / polarized wave interleaving unit of the transmission apparatus according to the first embodiment of the present invention. It is a functional block diagram of the receiver which concerns on the 1st Embodiment of this invention. It is a functional block diagram of a processing unit and a frequency / polarized wave deinterleaving unit of the receiving apparatus according to the first embodiment of the present invention. It is a functional block diagram of the transmitter which concerns on the 2nd Embodiment of this invention. It is a functional block diagram of a processing unit and a frequency / polarized wave interleaving unit of the transmission apparatus according to the second embodiment of the present invention. It is a functional block diagram of the receiver which concerns on the 2nd Embodiment of this invention. It is a functional block diagram of the process part of a receiver which concerns on the 2nd Embodiment of this invention, and a frequency-polarized wave deinterleaving part. It is a figure for demonstrating the example of a change of this invention.

(First embodiment of the present invention)
A digital broadcast system according to the first embodiment of the present invention will be described with reference to FIGS.

  The digital broadcast system according to the present embodiment is a digital broadcast system compatible with the next-generation terrestrial broadcast system, and includes the transmission device 10 shown in FIG. 1 and the reception device 30 shown in FIG. For example, it is assumed that the transmission device 10 is installed in a broadcasting station and the reception device 30 is installed in each home.

  Here, in the digital broadcast system according to the present embodiment, the transmission device 10 is configured to be able to transmit signals belonging to two layers (A layer and B layer) with one television channel. .

  In addition, the transmission apparatus 10 according to the present embodiment is configured to perform transmission using a MIMO transmission scheme using two transmission antennas. Specifically, the transmission apparatus 10 according to the present embodiment uses the STC scheme in the A layer (for example, 12 segments) in which the partial reception signal is transmitted and uses the B layer (for example, 1) in which the non-partial reception signal is transmitted. Segment) is configured to use the SDM method.

  For example, a mobile reception service (one-segment broadcasting service) signal is assumed as the partial reception signal, and a fixed reception service signal is assumed as the non-partial reception signal.

  As shown in FIG. 1, the transmission apparatus 10 according to the present embodiment includes a layer division unit 10A, an energy spreading unit 11B / 12B, an error correction coding unit 11C / 12C, a bit interleaving unit 11D / 12D, a mapping Unit 11E / 12E, time interleaving unit 11F / 12F, processing unit 11G / 12G, frequency / polarized wave interleaving unit 10H, layer synthesis unit 10I, OFDM frame configuration unit 11J / 12J, and IFFT (Inverse FFT) Unit 11K / 12K, GI addition unit 11L / 12L, quadrature modulation unit 11M / 12M, and transmission unit 11N / 12N.

  The hierarchy dividing unit 10A is configured to divide the input signal into data belonging to the A layer and the B layer.

  In order to avoid a situation in which only a specific frequency component becomes large, the energy spreading unit 11B is configured to perform energy spreading processing on the signal of the A layer input from the layer dividing unit 10A. The energy spreading unit 12B is configured to perform energy spreading processing on the signal of the B layer input from the hierarchy dividing unit 10A.

  For example, the energy spreading unit 11B / 12B is configured to perform a process of calculating an exclusive OR between the A layer / B layer signal input from the layer dividing unit 10A and the pseudo-random signal.

  The error correction encoding unit 11C is configured to perform error correction encoding processing on the A-layer signal input from the energy spreading unit 11B, and the error correction encoding unit 12C includes the energy spreading unit 12B. An error correction coding process is performed on the input B layer signal.

  For example, the error correction encoding unit 11C / 12C is configured to perform FEC (Forward Error Correction) processing on the A layer / B layer signal input from the energy spreading unit 11B / 12B.

  The bit interleaving unit 11D is configured to perform bit interleaving processing on the A layer signal input from the error correction encoding unit 11C, and the bit interleaving unit 12D is input from the error correction encoding unit 12C. In addition, it is configured to perform bit interleaving on the B-layer signal.

  The mapping unit 11E is configured to perform mapping processing (carrier modulation processing) on the A layer signal input from the bit interleaving unit 11D, and the mapping unit 12E includes the B input from the bit interleaving unit 12D. It is configured to perform mapping processing (carrier modulation processing) on hierarchical signals.

  For example, the mapping unit 11E / 12E is configured to generate a carrier symbol by mapping the A layer / B layer signal input from the bit interleaving unit 11D / 12D to the IQ plane and performing carrier modulation processing. Yes.

  The time interleaving unit 11F is configured to perform time interleaving processing on the A layer signal (carrier symbol) input from the mapping unit 11E, and the time interleaving unit 12F receives the B signal input from the mapping unit 12E. It is configured to perform time interleaving processing on a hierarchical signal (carrier symbol).

  As illustrated in FIG. 2, the processing unit 11G includes an STC unit 11G1, and the processing unit 12G includes an SDM unit 12G1, a transmission inter-antenna spreading unit 12G2, and an inter-polarization rotation unit 12G3. .

  For example, the STC unit 11G1 is configured to perform space-time coding (STC) processing using an Alamouti space-time block code on the A-layer signal input from the time interleaving unit 11F.

  Here, as shown in FIGS. 1 and 2, the processing unit 11G (that is, the STC unit 11G1) is configured to output two systems of A-layer signals.

  The SDM unit 12G1 is configured to divide the B layer signal input from the time interleave unit 12F into two B layer signals.

  The two B-layer signals output from the SDM unit 12G1 are output as they are, or are output after being subjected to inter-transmit antenna spreading processing by the inter-transmit antenna spread unit 12G2, or the inter-polarization rotation unit It is configured to output after being subjected to the inter-polarization rotation processing by 12G3.

  Here, the transmission antenna inter-spreading processing is performed on the signals of the two transmission systems corresponding to each transmission antenna (each polarization) and all the information constituting the signals of the two transmission systems (carrier modulation processing is performed). All of the values of the I-axis and the Q-axis constituting the signals of the latter two transmission systems are converted.

  Further, the polarization rotation process is a process in which the phases of signals of two transmission systems corresponding to each transmission antenna (each polarization) are rotated (see Japanese Patent Application No. 2013-091152).

  As shown in FIG. 2, the frequency / polarized wave interleaving unit 10H includes a frequency interleaving unit 10H1 and a frequency / polarized wave interleaving unit 10H2.

  The frequency interleaving unit 10H1 is configured to perform frequency interleaving processing on the signal input by the STC unit 11G1, that is, the frequency interleaving unit 10H1 is a signal subjected to only STC processing (SDM processing is performed). The signal is not subjected to frequency interleaving.

  Here, if the inter-polarization interleaving process is performed on the signal subjected only to the STC process, it is difficult to obtain the diversity effect. Therefore, only the frequency interleaving process is performed on the signal subjected to the STC process only. It is preferable to apply.

  However, in the transmission apparatus 10 according to the present embodiment, the inter-polarization interleaving process may be performed on a signal on which only the STC process is performed.

  In the transmission device 10 according to the present embodiment, the frequency interleaving unit 10H1 is configured to perform frequency interleaving processing on two systems of A-layer signals.

  On the other hand, the inter-frequency / polarized wave interleaving unit 10H2 is configured to perform frequency interleaving processing and inter-polarized wave interleaving processing on signals input from the SDM unit 12G1, the transmission antenna spreading unit 12G2, and the inter-polarization rotation unit 12G3. Yes.

  That is, the frequency / polarized wave interleaving unit 10H2 is configured to perform the frequency interleaving process and the interpolarized wave interleaving process on the signal that has been subjected to the SDM process.

  In the transmission device 10 according to the present embodiment, the frequency interleaving unit 10H1 is configured to perform frequency interleaving processing and inter-polarization interleaving processing on two systems of B-layer signals.

  The layer synthesizing unit 10I includes a first system signal out of two systems of A layer signals input from the frequency interleaving section 10H1 and two system B layer signals input from the frequency / polarized wave interleaving section 10H2. Are combined with the first system signal and the second system signal out of the two system A layers input from the frequency interleave unit 10H1 and the two systems B input from the inter-frequency / polarized wave interleave unit 10H2. It is configured to synthesize the second system signal of the hierarchical signals.

  The OFDM frame configuration unit 11J receives an OFDM frame corresponding to a first system signal (a signal obtained by combining a first system signal of the A layer and a first system signal of the B layer) input from the layer synthesis unit 10I. The OFDM frame configuration unit 12J receives the second system signal (the signal obtained by combining the second system signal of the A layer and the second system signal of the B layer) input from the layer synthesis unit 10I. A corresponding OFDM frame is configured.

  The IFFT unit 11K is configured to perform IFFT processing on the first system signal input from the OFDM frame configuration unit 11J, and the IFFT unit 12K includes the second system input from the OFDM frame configuration unit 12J. The signal is subjected to IFFT processing.

  The GI adding unit 11L is configured to add a guard interval GI to the first system signal input from the IFFT unit 11K, and the GI adding unit 12L is a second system input from the IFFT unit 12K. The guard interval GI is added to the signal.

  The quadrature modulation unit 11M is configured to generate a transmission signal by performing quadrature modulation processing on the first-system signal input from the GI addition unit 11L, and the quadrature modulation unit 12M includes the GI addition unit. The transmission signal is generated by performing orthogonal modulation processing on the second system signal input from 12L.

  The transmission unit 11N is configured to transmit the first system signal (transmission signal) input from the quadrature modulation unit 11M via one (or a plurality of) transmission antennas. The second-system signal (transmission signal) input from the quadrature modulation unit 12M is configured to be transmitted via one (or a plurality of) transmission antennas.

  According to such a configuration, in the transmission device 10, the layer division unit 10 </ b> A is configured to divide an input signal into a layer A signal and a layer B signal, and the processing unit 11 </ b> G / 12 </ b> G includes the layer A Since it is configured to perform either STC processing or SDM processing on signals belonging to the / B layer, the MIMO transmission method can be changed independently for each layer, and different MIMOs can be applied to one television channel. A transmission system can be realized.

  As shown in FIG. 3, the receiving apparatus 30 according to the present embodiment includes a receiving unit 31A / 32A, an orthogonal demodulating unit 31B / 32B, a symbol synchronizing unit 31C / 32C, an effective symbol extracting unit 31D / 32D, and an FFT. Unit 31E / 32E, frame synchronization unit 31F / 32F, propagation path estimation unit 30G, layer separation unit 30H, frequency / polarized wave deinterleaving unit 30I, processing unit 31J / 32J, time deinterleaving unit 31K / 32K, a demapping unit 31L / 32L, a bit deinterleaving unit 31M / 32M, an error correction decoding unit 31N / 32N, an energy despreading unit 31O / 32O, and a layer combining unit 30P.

  The reception unit 31A / 32A is configured to receive a transmission signal transmitted by the transmission device 10 via one (or a plurality of) reception antennas.

  The orthogonal demodulator 31B is configured to perform orthogonal demodulation on the signal input by the receiver 31A, and the orthogonal demodulator 32B is configured to perform orthogonal demodulation on the signal input by the receiver 32A.

  The symbol synchronization unit 31C is configured to perform symbol synchronization processing on the signal input by the orthogonal demodulation unit 31B, and the symbol synchronization unit 32C performs symbol synchronization on the signal input by the orthogonal demodulation unit 32B. It is configured to perform processing.

  The effective symbol extraction unit 31D is configured to perform an effective symbol extraction process on the signal input by the symbol synchronization unit 31C, and the effective symbol extraction unit 32D receives the signal input by the symbol synchronization unit 32C. The effective symbol extraction process is performed.

  The FFT unit 31E is configured to perform FFT processing on the signal input by the effective symbol extraction unit 31D, and the FFT unit 32E performs FFT processing on the signal input by the effective symbol extraction unit 32D. It is configured to apply.

  The frame synchronization unit 31F is configured to perform frame synchronization processing on the signal input by the FFT unit 31E, and the frame synchronization unit 32F performs frame synchronization processing on the signal input by the FFT unit 32E. It is configured to apply.

  The propagation path estimation unit 30G is configured to perform propagation path estimation processing based on the information input from the frame synchronization unit 31F / 32F and the signal input by the FFT unit 31E / 32E.

  The layer separation unit 30H is configured to perform layer separation processing on the signal input from the propagation path estimation unit 30G to separate the A layer signal and the B layer signal.

  As illustrated in FIG. 4, the frequency / polarized wave deinterleave unit 30I includes a frequency deinterleave unit 30I1 and a frequency / polarized wave deinterleave unit 30I2.

  Here, the frequency deinterleaving unit 30I1 is configured to perform frequency deinterleaving processing on the A layer signal input from the layer separating unit 30H.

  On the other hand, the frequency / polarized wave deinterleaving unit 30I2 is configured to perform a frequency deinterleaving process and an interpolarized wave deinterleaving process on the B layer signal input from the layer separating unit 30H.

  As illustrated in FIG. 4, the processing unit 31J includes a separation unit 31J1, and the processing unit 32J includes a transmission antenna despreading unit 32J1, an inter-polarization reverse rotation unit 32J2, and a separation unit 32J3. ing.

  The separation unit 31J1 is configured to perform a space-time decoding process corresponding to the STC process performed by the STC unit 11G1 illustrated in FIG. 2 on the signal input from the frequency deinterleave unit 30I1.

  Also, the transmission antenna despreading unit 32J1 performs transmission corresponding to the transmission antenna spreading process performed by the transmission antenna spreading unit 12G2 illustrated in FIG. 2 on the signal input from the frequency / polarized wave deinterleaving unit 30I2. An inter-antenna despreading process is performed.

  The inter-polarization reverse rotation unit 32J2 performs an inter-polarization reverse rotation process corresponding to the inter-polarization rotation process performed by the inter-polarization rotation unit 12G3 illustrated in FIG. 2 on the signal input from the frequency / polarized wave deinterleave unit 30I2. It is configured to apply.

  The separation unit 32J3 performs SDM processing performed by the SDM unit 12G1 illustrated in FIG. 2 on a signal input from the frequency / polarized wave deinterleaving unit 30I2, the transmission antenna despreading unit 32J1, or the interpolarization derotation unit 32J2. A corresponding spatial demultiplexing process is performed.

  The signal output by the frequency / polarized wave deinterleaving unit 30I2 is input to the demultiplexing unit 32J3 as it is, input to the transmission antenna despreading unit 32J1, or input to the interpolarization derotation unit 32J2. It is configured to be.

  The time deinterleaving unit 31K is configured to perform time deinterleaving processing on the A layer signal (carrier symbol) input from the processing unit 31J, and the time interleaving unit 32K is input from the processing unit 32J. In addition, a time deinterleave process is performed on the B layer signal (carrier symbol).

  The demapping unit 31L is configured to perform demapping processing (carrier demodulation processing) on the A layer signal input from the time deinterleaving unit 31K. The demapping unit 32L includes a time deinterleaving unit 32K. The demapping process (carrier demodulation process) is performed on the B-layer signal input from.

  The bit deinterleave unit 31M is configured to perform bit deinterleave processing on the A layer signal input from the demapping unit 31L, and the bit deinterleave unit 32M is input from the demapping unit 32L. It is configured to perform bit deinterleaving on the B layer signal.

  The error correction decoding unit 31N is configured to perform error correction decoding processing on the A-layer signal input from the bit deinterleaving unit 31M. The error correction decoding unit 32N is input from the bit deinterleaving unit 32M. The error correction decoding process is performed on the B-layer signal.

  The energy despreading unit 31O is configured to perform energy despreading processing on the A-layer signal input from the error correction decoding unit 31N, and the energy despreading unit 32O is input from the error correction decoding unit 32N. The energy despreading process is performed on the B-layer signal.

  The layer synthesizing unit 30P is configured to synthesize and output the A layer signal input from the energy despreading unit 31O and the B layer signal input from the energy despreading unit 32O.

(Second Embodiment)
With reference to FIGS. 5 to 8, a digital broadcast system according to the second embodiment of the present invention will be described focusing on differences from the digital broadcast system according to the first embodiment described above.

  FIG. 5 illustrates an example of functional blocks of the transmission device 10 according to the present embodiment. FIG. 6 illustrates functional blocks of the frequency / polarized wave interleaving unit 10H and the processing units 11G to 13G in the transmission device 10 according to the present embodiment. An example is shown.

  In the digital broadcasting system according to the present embodiment, as illustrated in FIG. 5, the transmission device 10 may transmit signals belonging to three layers (A layer, B layer, and C layer) using one television channel. It is configured to be able to.

  In addition, as illustrated in FIG. 6, the transmission apparatus 10 according to the present embodiment uses the SDM scheme in the A layer where the partial reception signal is transmitted, and uses the SDM scheme in the B layer where the non-partial reception signal is transmitted. The STC system is configured to be used in the C layer where the non-partial received signal is transmitted.

  As shown in FIG. 6, the frequency / polarized wave interleaving unit 10H includes a frequency / polarized wave interleaving unit 10HA, a layer combining unit 10HBC1, and a frequency / polarized wave interleaving unit 10HBC2. The unit 10HBC2 is configured to perform frequency interleaving processing and inter-polarization interleaving processing after the layer B signal and the layer C signal are combined by the layer combining unit 10HBC1.

  Note that the layer B signal and the layer C signal may not be combined by the layer combining unit 10HBC1.

  FIG. 7 illustrates an example of functional blocks of the receiving device 30 according to the present embodiment. FIG. 8 illustrates functional blocks of the frequency / polarized wave deinterleaving unit 30I and the processing units 31J to 33J in the receiving device 30 according to the present embodiment. An example is shown.

  As shown in FIG. 8, the frequency / polarized wave deinterleaving unit 30I includes a frequency / polarized wave deinterleaving unit 30IA, a frequency / polarized wave deinterleaving unit 30IBC1, and a layer separating unit 30IBC2.

  The layer separation unit 30IBC2 separates the signal of the B layer from the signal input from the frequency / polarized wave deinterleaving unit 30IBC1, and inputs the signal to the processing unit 32J, and the signal input from the frequency / polarized wave deinterleaving unit 30IBC1 The signal of the hierarchy is separated and input to the processing unit 33J.

  According to the transmission device 10 and the reception device 30 according to the present embodiment, frequency interleaving processing and inter-polarization interleaving processing can be performed between more segments, and transmission resistance against multipath can be improved.

(Example of change)
With reference to FIG. 9, a digital broadcasting system according to a modified example of the present invention will be described focusing on differences from the digital broadcasting systems according to the first and second embodiments described above.

  In the digital broadcasting system according to this modification, as shown in cases 2 and 3 shown in FIG. 9, the transmission apparatus 10 according to the present embodiment has at least the SDM scheme and the STC scheme in the A layer where the partial reception signal is transmitted. One may be configured to use the SDM scheme in the B layer where the non-partial received signal is transmitted and to use the SDM scheme in the C layer where the non-partial received signal is transmitted.

  In such case 2, the inter-frequency / polarized wave interleaving unit 10H of the transmission apparatus 10 according to the present embodiment performs frequency interleaving processing (or frequency interleaving processing and inter-polarization interleaving processing) on the A layer signal, and the B layer The frequency interleaving process and the inter-polarization interleaving process are performed on each of the above-mentioned signal and the C-layer signal.

  On the other hand, in such case 3, the inter-frequency / polarized wave interleaving unit 10H of the transmission device 10 according to the present embodiment performs frequency interleaving processing (or frequency interleaving processing and inter-polarization interleaving processing) on the A layer signal, After the B layer signal and the C layer signal are combined, the combined signal is subjected to frequency interleaving processing and inter-polarization interleaving processing.

  Further, in the digital broadcasting system according to the present modification, as illustrated in Case 4 illustrated in FIG. 9, the transmission device 10 according to the present embodiment includes at least the SDM scheme and the STC scheme in the A layer where the partial reception signal is transmitted. One may be configured such that the SDM scheme is used in the B layer where the non-partial received signal is transmitted, and the STC scheme is used in the C layer where the non-partial received signal is transmitted.

  In such case 4, the frequency / polarized wave interleaving unit 10H of the transmitting apparatus 10 according to the present embodiment performs frequency interleaving processing (or frequency interleaving processing and inter-polarization interleaving processing) on the A layer signal, and the B layer Are subjected to frequency interleaving processing and inter-polarization interleaving processing, and only frequency interleaving processing is performed on the C-layer signal.

  Further, in the digital broadcasting system according to this modification, as shown in cases 6 and 7 shown in FIG. 9, the transmission apparatus 10 according to the present embodiment uses the SDM scheme and the STC scheme in the A layer where the partial reception signal is transmitted. The STC method may be used in the B layer where the non-partial received signal is transmitted, and the SDM method may be used in the C layer where the non-partial received signal is transmitted.

  In such a case 6, the inter-frequency / polarized wave interleaving unit 10H of the transmission apparatus 10 according to the present embodiment performs frequency interleaving processing (or frequency interleaving processing and inter-polarization interleaving processing) on the A layer signal, and the B layer Only the frequency interleaving process is performed on the signal of, and the frequency interleaving process and the inter-polarization interleaving process are performed on the signal of the C layer.

  On the other hand, in such a case 7, the inter-frequency / polarized wave interleaving unit 10H of the transmission apparatus 10 according to the present embodiment performs frequency interleaving processing (or frequency interleaving processing and inter-polarization interleaving processing) on the A layer signal, After the B layer signal and the C layer signal are combined, the combined signal is subjected to frequency interleaving processing and inter-polarization interleaving processing.

  Further, in the digital broadcasting system according to this modification, as shown in cases 8 and 9 shown in FIG. 9, the transmission apparatus 10 according to the present embodiment performs the SDM scheme and the STC scheme in the A layer where the partial reception signal is transmitted. The STC method may be used in the B layer where the non-partial received signal is transmitted, and the STC method may be used in the C layer where the non-partial received signal is transmitted.

  In such case 8, the inter-frequency / polarized wave interleaving unit 10H of the transmission apparatus 10 according to the present embodiment performs frequency interleaving processing (or frequency interleaving processing and inter-polarization interleaving processing) on the A layer signal, and the B layer In this case, only the frequency interleaving process is applied to each of the above-mentioned signal and the C-layer signal.

  On the other hand, in such case 9, the inter-frequency / polarized wave interleaving unit 10H of the transmission apparatus 10 according to the present embodiment performs frequency interleaving processing (or frequency interleaving processing and inter-polarization interleaving processing) on the A layer signal, After the B layer signal and the C layer signal are combined, only the frequency interleaving process is performed on the combined signal.

  Note that the modification example of FIG. 9 is also applicable to a case where a partial reception signal is transmitted in the A layer. That is, in any of the A layer to the C layer, either the partial reception signal or the non-partial signal may be transmitted.

  The characteristics of the present embodiment described above may be expressed as follows.

  The first feature of the present embodiment is a transmitting apparatus 10 that is configured to divide an input signal into a plurality of hierarchies, and to perform spatial multiplexing on signals belonging to the respective hierarchies. The gist of the present invention is to include processing units 11G to 13G configured to perform either of the encoding process or the space-time encoding process.

  A second feature of the present embodiment is the receiving device 30, which is configured to separate a transmission signal transmitted by the transmitting device 10 into signals belonging to a plurality of layers, and each layer The gist of the present invention is to include processing units 31J to 33J configured to perform either the spatial demultiplexing process or the spatio-temporal decoding process on signals belonging to.

  A third feature of the present embodiment is a chip mounted on the receiving device 30 and configured to separate a transmission signal transmitted by the transmitting device 10 into signals belonging to a plurality of hierarchies A to C. The gist is to include a layer separation unit 30H and processing units 31J to 33J configured to perform either spatial demultiplexing processing or space-time decoding processing on signals belonging to the respective layers AC. To do.

  Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.

DESCRIPTION OF SYMBOLS 10 ... Transmitting device 10A ... Hierarchical division | segmentation part 11B, 12B, 13B ... Energy spreading | diffusion part 11C, 12C, 13C ... Error correction encoding part 11D, 12D, 13D ... Bit interleaving part 11E, 12E, 13E ... Mapping part 11F, 12F, 13F ... Time interleaving units 11G, 12G, 13G ... Processing unit 10H ... Frequency / polarized wave interleaving unit 10I ... Hierarchical combining unit 11J, 12J ... OFDM frame configuration unit 11K, 12K ... IFFT unit 11L, 12L ... GI adding unit 11M, 12M ... quadrature modulation units 11N, 12N ... transmission unit 30 ... reception devices 31A, 32A ... reception units 31B, 32B ... quadrature demodulation units 31C, 32C ... symbol synchronization units 31D, 32D ... effective symbol extraction units 31E, 32E ... FFT units 31F, 32F: Frame synchronization unit 30G: Propagation path estimation unit 30 ... layer separation unit 30I ... frequency / polarized wave deinterleaving units 31J, 32J, 33J ... processing units 31K, 32K, 33K ... time deinterleaving units 31L, 32L, 33L ... demapping units 31M, 32M, 33M ... bit deinterleaving units 31N, 32N, 33N ... error correction decoding units 31O, 32O, 33O ... energy despreading unit 30P ... hierarchical synthesis unit

Claims (3)

A transmitting device,
A hierarchy dividing unit configured to divide an input signal into a plurality of hierarchies;
Spatial multiplexing processing configured to perform spatial multiplexing processing on the first signal belonging to the first layer;
A space-time coding processing unit configured to perform space-time coding processing on the second signal belonging to the second layer and the third signal belonging to the third layer ;
A hierarchical synthesis unit configured to synthesize the first signal subjected to the spatial multiplexing process and the second signal subjected to the space-time coding process;
And facilities frequency interleaving and polarization interleave processing to the composite synthetic signal by the hierarchical combining unit, and performs a polarization interleave process to the time of the third signal spatial encoding processing is applied transmitting apparatus characterized by comprising a, interleaving means arranged to facilities Suyo frequency interleaving without. A receiving device,
Of the transmission signals transmitted by the transmission apparatus, a first signal belonging to the first layer and subjected to space multiplexing processing, and a second signal belonging to the second layer and subjected to space-time coding processing; polarization de with respect to the third signal but with facilities frequency deinterleave processing and polarization de-interleaving process on the synthesized synthesis signal and the spatial encoding process when belong to the third hierarchy is performed a deinterleaving means arranged to facilities Suyo frequency deinterleave processing without performing the interleaving process,
And hierarchy separating unit configured to separate the second signal belonging to the first signal and the second hierarchy belonging to the composite signal input from the deinterleave means to said first layer,
A spatial demultiplexing processing unit configured to perform spatial demultiplexing processing on the first signal belonging to the first layer;
A space-time decoding processing unit configured to perform space-time decoding processing on the second signal belonging to the second layer and the third signal belonging to the third layer. A receiving device. A chip mounted on a receiving device,
Of the transmission signals transmitted by the transmission apparatus, a first signal belonging to the first layer and subjected to space multiplexing processing, and a second signal belonging to the second layer and subjected to space-time coding processing; polarization de with respect to the third signal but with facilities frequency deinterleave processing and polarization de-interleaving process on the synthesized synthesis signal and the spatial encoding process when belong to the third hierarchy is performed a deinterleaving means arranged to facilities Suyo frequency deinterleave processing without performing the interleaving process,
And hierarchy separating unit configured to separate the second signal belonging to the first signal and the second hierarchy belonging to the composite signal input from the deinterleave means to said first layer,
A spatial demultiplexing processing unit configured to perform spatial demultiplexing processing on the first signal belonging to the first layer;
A space-time decoding processing unit configured to perform space-time decoding processing on the second signal belonging to the second layer and the third signal belonging to the third layer. A featured chip.

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