电讯技术2018，Vol.58Issue(1)：52-58,7.DOI:10.3969/j.issn.1001-893x.2018.01.010
低信噪比下随机交织器识别
Blind Recognition of Random Interleaver at Low SNR
摘要
Abstract
To recognize the Turbo code interleaver,a new algorithm based on logarithmic conformity is proposed,which can make full use of the soft decision information to identify the pseudo-random interleaver of the Turbo code.Firstly,logarithmic conformity is defined to measure the possibility of coding equations.As the result,the calculation complexity which is only related to the number of the code blocks and length of interleaver is simplified greatly and the methods of calculation are just the comparison and symbol extraction.Then,according to the fact that the correct position can make the possibility of overall coding equations maximum,the interleaver position can be recognized one by one.Compared with existed algorithms,the recognition of new algorithm is slightly worse,but its computational complexity is lower.The simulation results show that the correct ratio of recognition can reach 100％ at 0 dB by the 500 code blocks,when the length of interleaver is 200.关键词
Turbo码/随机交织器/参数识别/对数符合度/软判决信息Key words
Turbo code/random interleaver/parameter recognition/logarithmic conformity/soft decision分类
信息技术与安全科学引用本文复制引用
吴昭军,张立民,钟兆根..低信噪比下随机交织器识别[J].电讯技术,2018,58(1):52-58,7.基金项目
国家自然科学基金资助项目(91538201) （91538201）
山东省“泰山学者”建设工程项目(ts201511020) （ts201511020）
