基于编织卷积码的增强型FM-DCSK系统的设计与仿真  

Design and Simulations of an Enhanced FM-DCSK System Based on Woven Convolutional Codes

作　　者：魏琴芳[1] 王琳[1] 余格非[1] 夏玉雷[1] 

机构地区：[1]重庆邮电学院编码技术研究所,重庆400065

出　　处：《无线通信技术》2005年第3期5-9,共5页Wireless Communication Technology

基　　金：国家自然科学基金项目(60272005)资助;重庆邮电学院青年教师基金项目(A2005-29)资助

摘　　要：FM-DCSK,即调频-差分相干混沌相移键控,是一种针对移动通信中的多径环境提出的调制解调方式,它以高频混沌信号作为载波,采用非相干解调,对对抗多径衰落有很好的效果。若将它用于无线通信中,将提高信道利用率,从而获得一定的经济效益。为了进一步提高其抗干扰和抗衰减性能,我们提出了加入信道编码与之结合的算法,发现性能有了大幅度的提高。该技术的提出对进一步推动混沌通信系统的研究和应用有重要意义。FM-DCSK is a non-coherent modulation and demodulation technique that use a chaos signal as the carrier. Due to its inherent broadband nature, it has good performance of anti-multipath-fading and is promising in application of wireless communication field. In order to improve the performance of the chaos system greatly, an enhanced FM-DCSK communication system based on woven convolutional codes （WCCs） is presented in this paper. The simulations result shows that this enhanced system is superior to that without WCCs by about 8dB over AWGN channel and about 12 DB over REYLEIGH channel. This technique is significant to promote the study and application of chaos communication system.

关 键 词：FM-DCSK 编织卷积码 混沌通信 AWGN 瑞利衰落信道 

分 类 号：TN911.22[电子电信—通信与信息系统]