极化码子序列编译码算法研究

Investigation of Coding and Decoding Algorithms of Polar Code Subsequence

针对有限长极化码由于信道极化不完全,使得部分信息比特未能在无噪信道上传输,导致无法获得理想译码性能的问题,通过对无噪的极化子信道数目与待传信息比特数目的计算和对比.提出一种极化码子序列编译码算法.将信息比特序列按照无噪信道数目大小分为数个子序列分别送入信道,确保每一个子序列都在无噪信道上传输.仿真结果表明,极化码子序列编译码算法可以获得理想的误码性能;同时在牺牲较小的传输速率的情况下,极化码子序列编译码算法的误码性能优于传统编译码算法;且对极化码短码的误码性能的改善更加显著.

Due to the limited length of polar code,the channel polarization will be incomplete.Partial information bits cannot be transmitted on the noiseless channel,which will greatly degrade decoding performance.A coding and decoding algorithm of polar code subsequence has been proposed through calculating and comparing the number of the noiseless polar subchannels and the information bits.The information bits will be divided into several subsequences according to the number of the noiseless channels in this algorithm,which ensures each subsequence is transmitted in noiseless channels.Finally,the simulation results show that coding and decoding algorithm of polar code subsequence can reach the ideal BER performance.What's more,the BER performance of the proposed algorithm is also better than the traditional coding and decoding algorithm at the expense of slight transmission speed,especially for the short code.