关键词: 低密度校验码 比特交织调制 多层码

Abstract:

A new bit-interleaved coded modulation （BICM） scheme based on punctured low-density parity-check （LDPC） codes is designed in this paper. The proposed system either constructs the component LDPC code based on the criterion for the AWGN channel followed by optimal parity puncturing, or creates the c omponent LDPC code based on the criterion for the BEC channel followed by random puncturing. Simulation results show that the proposed system performs w  ithin 1 dB  bove the BICM capacity across a range of rates. Therefore, the system can efficiently adapt to the varying of channels and perform excellent  lly under different conditions.

Key words: （low-density parity-check code, bit-interleaved coded modulation, multilevel coding）