Reception device, transmission device, reception method, transmission method, program, and radio communication system
A reception device comprises a reception unit for receiving signals transmitted by assigning respectively a plurality of different frequency signal groups, which are generated based on a same bit sequence, to a plurality of layers, an MIMO separation unit for executing MIMO separation of the signals, received by the reception unit, into the frequency signal groups corresponding respectively to the plural layers, and a merging unit for merging individual items of information based on the frequency signal groups obtained by the MIMO separation, the items of information corresponding respectively to the plural layers.
1. A reception device comprising:
a reception unit for receiving signals transmitted by assigning respectively a plurality of different frequency signal groups, which are generated based on a same bit sequence, to a plurality of layers;
an MIMO demultiplexing unit for implementing MIMO demultiplexing of the signals, received by the reception unit, into the frequency signal groups corresponding respectively to the plural layers;
a de-interleaving unit for applying different de-interleaves, for each of the plural layers, to the frequency signal groups resulting from the MIMO demultiplexing implemented by the MIMO demultiplexing unit and corresponding respectively to the plural layers;
a demodulation unit for demodulating, for each of the plural layers, the frequency signal groups having been subjected to the de-interleaves by the de-interleaving unit; and
a combining unit for merging individual items of information based on the demodulated frequency signal groups, the items of information corresponding respectively to the plural layers.
2. The reception device according to claim 1 , wherein:
the frequency signal groups assigned respectively to the plural layers are frequency signal groups based on bit sequences that are obtained by applying the different interleaves, for each of the plural layers, to a coded bit sequence resulting from channel coding of the same bit sequence, and
the items of information merged by the combining unit are bit LLRs obtained by applying the de-interleaves to the bit LLRs, which are based on the frequency signal groups resulting from the separation by the MIMO demultiplexing unit, in order to de-interleave the different interleaves having been applied to each of the plural layers.
3. The reception device according to claim 1 , wherein:
the frequency signal groups assigned respectively to the plural layers are signals obtained by applying the different interleaves in a frequency domain for each of the plural layers, and
the items of information merged by the combining unit are signals obtained by applying the de-interleaves to the frequency signal groups resulting from the separation by the MIMO demultiplexing unit, in order to de-interleave the different interleaves having been applied for each of the plural layers.
4. The reception device according to claim 3 , wherein the interleaves are cyclic shifts in the frequency domain.