基于Woven卷积码的FM-DCSK系统在衰落信道下的性能分析  

Design and simulations of an enhanced FM-DCSK system based on woven codes

作　　者：夏玉雷[1] 王琳[1] 

机构地区：[1]重庆邮电学院,重庆400065

出　　处：《重庆邮电学院学报（自然科学版）》2005年第5期533-537,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(60272005);国家"863"资助项目(2001AA123061)

摘　　要：调频-差分相干混沌相移控件(FM-DCSK)是一种针对移动通信中的多径环境提出的调制解调方式。它以一种高频混沌信号作为载波,采用非相干解调,对抗多径衰落有很好的效果。提出了W oven卷积码的FM-DCSK系统,通过仿真发现,在AWGN和Rayle igh,R icean平坦衰落以及Rayle igh多径衰落环境下,W oven卷积码比传统信道编码对改善该系统的性能更具优势,尤其在衰落信道下前者编码增益十分显著。这对将FM-DCSK技术纳入未来抗干扰通信系统进行实用化设计具有重要价值。FM-DCSK is a non-coherent modulation and demodulation technique that uses a chaos signal as the carrier. Due to its inherent broadband nature, its good performance of anti-muhipath-fading is promising in application of wireless communication field. In order to improve the global performance of this chaos system, enhanced FM-DCSK communication system based on Woven codes is presented. Through system simulations, it turns out that this enhanced system is superior to that with conventional channel codes over AWGN, RAYLEIGH and RICEAN flat fading channel; especially over the fading channel the coding gain of this system is notable. The intrduction of this technique has a great sense in promoting the study and application of chaos communication system.

关 键 词：FM-DCSK Woven卷积码(WCCs) 混沌通信 AWGN 瑞利衰落信道 

分 类 号：TN914[电子电信—通信与信息系统]