着重对极化码编码时涉及的信道选择技术进行展开研究。在二进制删除信道(BEC)环境下,利用Bhattacharyya参数分别从信道转移概率和码长的两方面说明对信道选择的影响。(This paper focuses on the channel selection technology in polarization code coding. In the binary deleted channel (BEC) environment, Bhattacharyya parameters are used to illustrate the influence on channel selection from two aspects of channel transfer probability and code length.)