首页 | 本学科首页   官方微博 | 高级检索  
     

基于多符号分组的CPM软输出非相干检测算法
引用本文:杨友福,刘建伟,张其善,修春娣.基于多符号分组的CPM软输出非相干检测算法[J].通信学报,2012(8):113-118.
作者姓名:杨友福  刘建伟  张其善  修春娣
作者单位:北京航空航天大学电子信息工程学院
基金项目:国家重点基础研究发展规划基金资助项目(10961013);国家教育部博士点基金资助项目(20091102110004);国家重点基础研究发展计划(“973”计划)基金资助项目(2012CB315900)~~
摘    要:提出了一种CPM非相干检测算法,以连续多个符号为观测窗计算码字先验概率,以此完成CPM软解调计算操作,算法性能随着观测符号长度增加而提高。给出了非相干接收机结构,利用Walsh基函数扩展方法减少匹配接收计算量。仿真研究了不同CPM调制参数下卷积编码CPM系统非相干检测性能,结果表明,提出的非相干检测算法具有很好的顽健性,对于2CPM、4CPM串行级联编码调制,当观测长度为4个符号时,系统性能较单符号非相干检测算法有近6dB增益。

关 键 词:CPM  串行级联编码调制  非相干检测  迭代译码

Multiple symbol soft-output non-coherent detection of serial concatenated CPM
YANG You-fu,LIU Jian-wei,ZHANG Qi-shan,XIU Chun-di.Multiple symbol soft-output non-coherent detection of serial concatenated CPM[J].Journal on Communications,2012(8):113-118.
Authors:YANG You-fu  LIU Jian-wei  ZHANG Qi-shan  XIU Chun-di
Affiliation:(School of Electronic and Information Engineering,Beihang University,Beijing 100191,China)
Abstract:A non-coherent detection algorithm for CPM was proposed.Several sequential symbols were used as the ob-servation window to calculate the prior probability for codeword in CPM soft demodulation process,and the more obser-vation symbols were used,the better performance the algorithm achieved.Non-coherent receiver architecture was given,in which expansion method of Walsh basis function was utilized to reduce the calculating amount in matched filtering.Non-coherent detection performances of convolutional encoding CPM system adopting the proposed algorithm,with dif-ferent CPM modulation parameters,were compared through simulation.The results indicate that proposed non-coherent detection algorithm brings significant robustness.As to 2CPM,4CPM serial concatenated encoding modulation,when the observation length gets to 4 symbols,system with the proposed algorithm gets nearly 6dB performance improvement than with the single-symbol non-coherent detection algorithm.
Keywords:continuous phase modulation  serially concatenated coded modulation  non-coherent detection  iterative de-coding
本文献已被 CNKI 等数据库收录!
点击此处可从《通信学报》浏览原始摘要信息
点击此处可从《通信学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号