改进交织的单层极化码高阶编码调制系统

极化码作为一种新型编码方式，被采纳为5G通信中的短码方案。本文将极化码应用到比特交织编码调制（Bit-Interleaved Coded Modulation，BICM）系统，优化交织器的设计，提出了一种新型交织算法。相比于现有的交织算法，新型交织算法的提出是基于比特信道可靠性衡量参数，将高可靠性的比特信道与低可靠性的比特信道交错设计，按照高可靠性信道对低可靠性信道辅助译码的方式，提高极化码的纠错性能。由于新型交织算法只存在于比特信道可靠度参数的简单排序，在复杂度上没有明显增加。仿真结果表明:新型交织算法具有优异的性能，当误码率为10-5，码长为256时，采用新型交织算法的极化码BICM系统与LDPC码的BICM系统相比大约有1.51 dB的增益。 

Single-Layer High-Order Polar-Coded Modulation System with Improved Interleaver

Polar codes is a new channel coding scheme,which has been adopted as a short block lengths scheme of the 5th-Generation.In this paper,a bit-interleaved coded modulation(BICM) system was presented based on the polar codes,and an improved interleaving algorithm was proposed to optimize the interleaver.The interleaver was proposed based on the parameters of the reliability of bit channels,and the high-reliability bit channels were interleaved with the low-reliability bit channels to assist decoding.Thereby,the error correction performance of polar codes was improved.And as the sorting operation was simple,there was no significant increase in complexity.Simulation results show that the optimized interleaver has excellent performance.Compared to the BICM system based on the Low Density Parity Check code,the BICM system based on the polar codes with the optimized interleaver has a gain of about 1.51 dB when the bit error rate is 10-5,and the code length is 256.