Rate-Compatible LDPC Codes for Cross-Layer Design Combining of AMC with HARQ

This paper proposes a cross-layer design combining of adaptive modulation and coding (AMC) with hybrid automatic repeat request (HARQ) based on rate-compatible low-density parity-check codes (RC-LDPC). First we investigate the puncturing pattern of RC-LDPC codes and prove that our puncturing pattern is as good as random puncturing. Then we apply RC-LDPC codes to cross-layer design combing AMC with ARQ over Nakagami-m fading channel and investigate the throughput of the system. Computer simulations show that the joint design of AMC and ARQ base on RC-LDPC codes can achieve considerable spectral efficiency gain