一种高误码率下QC-LDPC码的快速识别算法  

A Fast Acquisition Algorithm for QC-LDPC Check Matrix under High Bit Error Rate

作　　者：宋秉玺 李广峰 杨松 郭晓东 SONG Bingxi;LI Guangfeng;YANG Song;GUO Xiaodong(Hebei Key Laboratory of Electromagnetic Spectrum Cognition and Control,Shijiazhuang 050081,China;Unit 91746,PLA,Beijing 100094,China)

机构地区：[1]河北省电磁频谱认知与管控重点实验室,河北石家庄050081 [2]中国人民解放军91746部队,北京100094

出　　处：《无线电通信技术》2022年第6期1117-1121,共5页Radio Communications Technology

基　　金：国家自然科学基金(U20B2071)。

摘　　要：针对QC-LDPC现有算法大多是利用误码率低的数据来重构校验矩阵进行识别,但是实际中很难获取足够多的高质量数据。因此,针对QC-LDPC编码提出了一种位置矩阵与循环位移值分步识别的方法,降低了高斯消元法的方程维度。该方法可以在低信噪比、高误码率的情况下仍保持良好的识别准确率,且算法的计算量大幅降低。通过测试平台进行了实测,证明该方法可以满足实际工程性能和指标要求。Existing algorithms for QC-LDPC mostly use data with low bit error rate to reconstruct check matrix for acquisition,but it is difficult to obtain enough high-quality data in practice.Thus,for QC-LDPC coding,a step-by-step acquisition method of position matrix and cyclic displacement value is proposed,which reduces the equation dimension of gauss elimination.With low signal-to-noise ratio and high bit error rate,this method can still keep good acquisition accuracy,and the calculation amount of the algorithm is greatly reduced.The method is tested on the test platform,which meets the requirements of actual engineering performance.

关 键 词：准循环低密度奇偶校验码 校验矩阵 高误码率 

分 类 号：TN975[电子电信—信号与信息处理]