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Analysis of Interference and Research of Coexistence for Chaos Ultra-WideBand Wireless Communication Systems

Author: JiangChunYan
Tutor: GuLiMin
School: Nanjing University of Aeronautics and Astronautics
Course: Communication and Information System
Keywords: Ultra-Wideband Chaos Modulation Additive white Gaussian noise Rake receiver Interference Coexist
CLC: TN925
Type: Master's thesis
Year: 2009
Downloads: 36
Quote: 0
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Abstract


Ultra-wideband radio technology is the use of nanosecond to picosecond non -sine wave pulse to transmit data, it has many of the advantages of high transmission speed, low power consumption, security , anti-multipath capability and low cost , indoors short-range high-speed wireless communication and precise positioning and other fields has broad application prospects . And chaos in nonlinear systems deterministic , class of random process , its basic features are extremely sensitive to initial conditions , chaotic systems can provide a large number of excellent correlation properties of the spreading sequence . In this paper, chaotic sequence UWB ( TH - UWB ) systems and direct-sequence ultra-wideband ( DS - UWB ) system hopping code and the spreading code , the first analysis of chaotic time hopping pulse position modulation , chaotic time hopping pulse amplitude modulation and chaotic direct-sequence pulse amplitude modulation BER performance in additive white Gaussian noise . Second , we study the chaotic UWB system based Rake receiver performance in multipath channel simulation to analyze and compare different receiver merging algorithm and channel the Rake receiver performance . In addition, the ultra-wideband technology with the conventional conventional communication technology type , its share of a wide spectrum of other wireless communication systems also exist within the frequency band occupied , and therefore based on the chaotic sequence of the UWB system with the existing communication system coexist has become the key to this technology is the ability to obtain a wide range of applications . This paper discusses the different modulation chaotic UWB system based anti- single- frequency sinusoidal obstruction noise band noise and narrowband interference , Chaos UWB system parameters of the anti-jamming performance . Finally, a chaotic ultra wideband signals for wireless local area networks ( WLANs ) , Global Positioning System (GPS) and direct sequence spread spectrum system ( DS - SS ) interference, and gives the simulation results of chaotic ultra wideband signals the system .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Radio relay communications,microwave communications
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