BCH 是纠错能力可控的纠错编码，是循环码的子类． 介绍了BCH 码的编码原理和设计方法，在特定信道和调制方式下对经过BCH 编码的系统进行仿真，分析BCH 码在特定信道下的编码增益.-BCH is error correction ability of controllable error correction coding, is a subclass of cyclic code. Introduces BCH code coding principle and design method, in particular channel and a way to pass under the code BCH system, and simulation analysis in particular channel BCH code of the encoding gain.