改进的分段CRC辅助的删余Polar译码  

Improved segmented CRC assisted puncturing Polar decoding

作　　者：倪妍红 楼向雄[1] 包建荣[1] NI Yanhong;LOU Xiangxiong;BAO Jianrong(Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学,浙江杭州310018

出　　处：《电信科学》2019年第3期91-98,共8页Telecommunications Science

基　　金：国家自然科学基金资助项目(No.U1709220;No.61702149;No.61471152);浙江省科技计划基金资助项目(No.LGG18F010011);浙江省自然科学基金资助项目(No.LY17F010019);浙江省固态硬盘和数据安全技术重点实验室开放课题(No.ZJSSKL001);杭州电子科技大学2017年高等教育研究资助项目(No.XNFZ201702)~~

摘　　要：提出了一种分段循环冗余校验(CRC)辅助的删余译码算法。该方法利用BP译码的大并行度和CRC校验的高可靠性,将CRC校验比特均匀或按比例分散插入原信息比特中。仿真表明:当码长N为1 024、信噪比为3.5 dB时,分段CRC(2, 16×2)和CRC(2, 24+8)相比基于G矩阵检测译码平均迭代次数分别少2.7次和2.8次;当码长M为896时,误码率为10^(-5)的两种分段CRC相比无CRC辅助BP删余译码,均获得约0.7 dB增益。A segmented cyclic redundancy check(CRC) assisted decoding algorithm was proposed. This method makes use of the high parallelism of BP decoding and the high reliability of CRC verification,and uniformly or proportionally disperses CRC verification bits into the original information bits. Simulation results show that when the code length N is 1024 and the SNR is 3.5dB,the average iterations of segmented CRC(2,16×2)and CRC(2,24+8) are 2.7 and 2.8 times less than those of G matrix based decoding. When the code length M is 896,the two segmented methods with a bit error rate of 10-5 obtained about 0.7dB gain compared with the non-CRC assisted BP puncturing decoding.

关 键 词：删余Polar码 置信传播译码 循环冗余校验 分段译码 

分 类 号：TN911[电子电信—通信与信息系统]