Spatially coupled QC-LDPC for the tradeoff between MIMO BICM and BICM-ID schemes

The combination of multiple-input multiple-output (MIMO) and bit-interleaved coded modulation (BICM)/BICM with iterative demapping (BICM-ID) is one of the key technologies to meet the high-transmission-rate requirement of the next generation broadcasting systems. However, conventional low-density pa...

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Bibliographic Details
Main Authors: Yushu Zhang, Kewu Peng, Jian Song
Format: Conference Proceeding
Language:English
Subjects:
bit-interleaved coded modulation (BICM)
Channel coding
Couplings
iterative demapping
MIMO
Modulation
Optimization
Parity check codes
quasi-cyclic
Receiving antennas
spatially coupled low-density parity-check (SC-LDPC) codes
Transmitting antennas
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Summary:The combination of multiple-input multiple-output (MIMO) and bit-interleaved coded modulation (BICM)/BICM with iterative demapping (BICM-ID) is one of the key technologies to meet the high-transmission-rate requirement of the next generation broadcasting systems. However, conventional low-density parity check (LDPC) coded MIMO BICM schemes always show poor performance with iterative demapping, and vice versa. In this paper, a subset of spatially coupled codes, finite-length spatially coupled (SC-) quasi-cyclic (QC-) LDPC code, is proposed and the universality of spatially coupled codes is utilized to achieve a good tradeoff between MIMO BICM and BICM-ID schemes. Due to the specific code structure of SC-QC-LDPC, the tool of multi-edge type density evolution (MET-DE) is employed for the performance analysis and code optimization. As an example, a finite-length SC-QC-LDPC code is optimized in binary-input additive white Gaussian noise channel, and then bit error rate simulations are carried out to verify the universality of the designed code in MIMO BICM and BICM-ID schemes.
ISSN:2155-5052
DOI:10.1109/BMSB.2017.7986240