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Optimization of degree-profile matching interleavers for LDPC-coded modulation
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DOI：10.1109/LCOMM.2006.060958.png)
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Abstract
En 中文
In this paper we introduce the concept of degree-profile matching interleavers (DPM-interleavers) and propose an LDPC-coded modulation scheme with a DPM-interleaver for 2(m)-PAM. One advantage of our scheme over conventional LDPC-coded modulation schemes is to support various modulation orders in a single coder/decoder by properly choosing DPM-interleavers according to each modulation order. Given the degree distribution for a good binary LDPC code, we present the optimized degree-profiles for DPM-interleavers by density evolution in the cases of 4-PAM and 8-PAM, respectively. Simulation results show that our proposed scheme provides compatible performance with those of conventional LDPC-coded modulation schemes.
Keywords:
bit-interleaved coded-modulation (BICM)
density evolution
low-density parity-check (LDPQ codes
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4.4
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1.3W
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2.2W
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