As a crucial part in bit-interleavered coded modulation (BICM), protograph low-density paritycheck(P-LDPC) codes and interleavers can greatly improve the performance of a BICM system. In this paper, we use a modified EXIT analysis method to analyze thresholds for a P-LDPC coded BICM system
with high-order QAM in different variable degree matched mapping (VDMM) schemes. A general criterion for optimization of VDMM interleavers is proposed. Results of numerical analysis and simulation show correctness of the optimization criterion.
DOU Jin-fang1, HE Shan-bao2, JIANG Ming3
. Optimized Interleaver for Protograph LDPC Coded BICM with High Spectral Efficiency[J]. Journal of Applied Sciences, 2014
, 32(1)
: 32
-38
.
DOI: 10.3969/j.issn.0255-8297.2014.01.006
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