基于LDPC码的BICM方案的性能研究

Research on performance of LDPC coded BICM schemes

将LDPC码与比特交织编码调制 (BICM)相结合 ,分别给出了在QPSK、8PSK调制方式下AWGN信道和Rayleigh衰落信道中的性能 ,并在Rayleigh衰落信道中分析了信道信息对于性能的影响 .在译码端没有采用解调器和译码器之间的迭代 ,因此译码复杂度相对较低 .仿真结果表明 ,BICM中采用LDPC码在AWGN信道和Rayleigh衰落信道中都具有较好的性能 .

Bit interleaved coded modulation (BICM) schemes using LDPC codes are analyzed. The performance over additive white Gaussian noise (AWGN) and Rayleigh fading channels using QPSK and 8PSK modulation are provided. The effect of CSI in Rayleigh fading channel is also analyzed. The schemes have low decoding complexity for the simplified decoding method without iteration between demodulator and decoder. From the simulation results it can be concluded that the schemes with low complexity decoding method have good performance both over AWGN and Rayleigh fading channels.