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FM-DCSK UWB System Design and Its Performance Analysis in Multipath Channel


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FM-DCSK UWB System Design and Its Performance Analysis in Multipath Channel
LI Hui12SONG Yao-liang1YANG Yu-wang1
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
chaotic systems bit energy bit-error ratios frequency modulated differential chaos shift keying ultra-wideband Colpitts circuits
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 results show that it has a constant bit energy and no need for channel estimation.The receiver can avoid inner-and-inter-symbol interferences,and effectively obtain multipath energy.It is suitable for frequency division multiple access communication system.


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Last Update: 2012-12-19