更少资源下的扩展码长方案研究

Research on Extended Code Length Solution under Less Resources

在Polar码重传中,如果重传的资源比新传的资源少,那么可使用不同的重传方案:重复发射原来的编码字(低复杂度)、使用原母码长度的扩展码长方案(中等复杂度)、使用可变母码长度的扩展码长方案(高复杂度)等,对这三种方案进行了分析,从仿真结果来看,在一定码率和资源下,可变母码长度的扩展码长方案具有一定的性能优势。

During the retransmission of Polar Codes,different solutions can be adopted if the resources for retransmission are less than new transmission,such as repetitive transmission of the original codeword bits(low complexity),extended code length solution with the original code length(median complexity)and extended code length solution with a variable original code length(high complexity),etc.This paper analyzes these three solutions and simulation results show that the third solution performs better under a certain coding rate and resource.