OFDM系统的不同编码如BPSK，QPSK，mQAM等在瑞利信道或高斯信道中传播的特性曲线分析。-The different coding of OFDM system in Rayleigh channel, or Gaussian channel spread features such as BPSK, QPSK, mQAM curve analysis.

信道编码，RM码在加性高斯白噪声信道下编码器 与译码器-RM codes encoder and decoder