Research And Performance Emulation Of Chaos Ultra-WideBand Wireless Communication Systems With Multiusers

As the Ultra-WideBand (UWB) is a new technique for wireless communication, it's low probabilities of intercept and detection, high transmission rate, low power consumption, robustness to multi-path and low cost, makes it the hot spot in wireless communication research and developing field. Since the performance analysis is extremely important to the research on the system of UWB wireless communications, this paper mainly analyzes the performance of the UWB system.This paper first discusses the production of the chaotic sequence and its correlation characteristic, uses the chaotic sequence as the time hopping sequence and spectrum sequence for PPM and PAM modulation in UWB communication system, under the Gauss channel, analysis and simulates the CTH-PPM and CDS-PAM system's performance; as the basis for the establishment of a chaotic UWB multi-user system model, infers the error rate formula under the AWGN channel system; refers to the IEEE 802. 15. 3a ultra-wide band standard multipath channel model, unifies the Rake receiver technology, simulates the performance of multi-user system for chaotic UWB under the multipath channel; Aiming at the characteristic of chaotic ultra-wide band multi-user system researches on the multi-user detection, depending on the simulation validates the effectiveness of decorrelation multi-user detection and MMSE multi-user detection. To rudece the simulation complexity of the MMSE algorithm, has improved simulation algorithm of TH receiver and reduce the complexity of chaotic ultra-wide band multi-user system model, simulation results show that the algorithm in improving the effectiveness of simulation speed and reducing system receiver order of complexity reaches the desired effect.