用matlab实现的GSM TCH/EFS系统在高斯信道、瑞利信道下的性能仿真，其中用到了循环编码、卷积码、交织码等信道编码技术-Using matlab to achieve GSM TCH/EFS system in the Gaussian channel, Rayleigh channel the performance of simulation, which uses a loop encoding, convolutional codes, interleaving codes c