| FM-DCSK超宽带系统设计及其多径信道性能分析 |
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| 引用本文： | 李辉,宋耀良,杨余旺.FM-DCSK超宽带系统设计及其多径信道性能分析[J].南京理工大学学报(自然科学版),2008,32(5). |
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| 作者姓名： | 李辉 宋耀良 杨余旺 |
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| 作者单位： | 1. 南京理工大学,电子工程与光电技术学院,江苏,南京,210094;河南理工大学,电气工程与自动化学院,河南,焦作,454010
2. 南京理工大学,电子工程与光电技术学院,江苏,南京,210094 |
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| 摘 要： | 针对现有超宽带混沌系统使用的混沌信号频谱不够平坦、不具有恒定比特能量和多址通信困难的问题，提出了频谱平坦、带宽超过1GHz、两级级联的Colpitts振荡超宽带混沌信号产生电路；构建了相应的调频差分混沌键控（FM—DCSK）超宽带系统；并从理论上分析了在多径信道下系统误码率的解析式。结果表明，该系统具有恒定比特能量，不需信道估计，接收端可以有效地获得多径分量能量同时避免码内和码间干扰。系统通过频分方式可以方便实现频分多址通信。
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| 关 键 词： | 混沌系统 比特能量 误码率 调频差分混沌键控 超宽带 Colpitts振荡电路 |
FM-DCSK UWB System Design and Its Performance Analysis in Multipath Channel |
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| LI Hui,SONG Yao-liang,YANG Yu-wang.FM-DCSK UWB System Design and Its Performance Analysis in Multipath Channel[J].Journal of Nanjing University of Science and Technology(Nature Science),2008,32(5). |
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| Authors: | LI Hui SONG Yao-liang YANG Yu-wang |
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| Institution: | 1.School of Electronic Engineering and Optoelectronic Technology;NUST;Nanjing 210094;China;2.School of Electrical Engineering and Automation;Henan Polytechnic University;Jiaozuo 454010;China |
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| Abstract: | Because of the disadvantages of the current ultra-wideband(UWB) chaotic systems such as inadequate spectrum width,variable bit energy and difficult use in multiple-access communication,a novel UWB chaotic signal generation circuit with a flat bandwidth over 1 GHz is proposed by means of two-level cascading Colpitts circuits.A corresponding FM-DCSK(frequency modulated differential chaos shift keying) UWB system is constructed.The system's bit-error ratio in the multipath channel is analyzed in theory.The res... |
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| Keywords: | chaotic systems bit energy bit-error ratios frequency modulated differential chaos shift keying ultra-wideband Colpitts circuits |
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