改进FM-DCSK超宽带系统设计与分析  

Design and Analyze Improved FM-DCSK Ultra-wide Band System

作　　者：李辉[1] 宋耀良[1] 杨余旺[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院

出　　处：《武汉理工大学学报》2008年第3期118-120,138,共4页Journal of Wuhan University of Technology

摘　　要：解调模板中的噪声分量是降低FM-DCSK超宽带系统性能的一个重要因素。改进后的系统每比特信号包含相同的多帧参考信号和数据信号,接收端将包含噪声的多帧参考信号段和数据信号段分别对齐求和,再求平均,最后将二者平均的结果进行差分相干解调。从理论上给出了在多径信道下系统误码率的解析式,结果表明改进的系统比改进前对同步的要求降低,而且可以有效地降低解调模板和数据段的噪声分量,从而系统的性能有了很大的改善。The noise in demodulated template was an important factor declining FMDCSK UWB system s performance.Every bit in improved system was composed of many same frames including reference and modulated symbol.In the receiver,the references and modulated symbols in one bit were separated to be summed and averaged.The two averaged parts were demodulated in difference mode.In the multipath channel the system s BER was obtained in theory.The result showed that compared to unimproved system,the improved system had low...

关 键 词：FM-DCSK 超宽带 多径信道 

分 类 号：TN929.5[电子电信—通信与信息系统]