Performance analysis of multi-stage interference cancellation for ultra-wide band multiple-access communication systems

Authors:
Jyh-Horng Wen;Ho-Lung Hung
Affiliations:
Department of Electrical Engineering, Tunghai University, Taichung, Taiwan;Department Of Electrical Engineering, Chienkuo Technology University, Cheng, Taiwan
Venue:
Wireless Communications & Mobile Computing
Year:
2012

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Abstract

In this contribution, a novel particle swarm optimization (PSO)-based multi-user detector (MUD) aided time-hopping ultra-wide band (TH-UWB) system has been investigated in the multi-path channel model. In this approach, the PSO-based MUD employs the output of the Rake receiver as its initial value to search for the best solution which results in a formulated optimization mechanism. By taking advantage of the heuristic values and the collective intelligence of PSO technique, the proposed detector offers almost the same bit error rate (BER) performance as the full-search-based optimum MUD does, while greatly reducing the potentially computational complexity. Simulation results have been provided to examine the evolutionary behavior and the detection performance of the proposed PSO-based MUD in both the additive white Gaussian noise and the multi-path fading channel. Copyright © 2011 John Wiley & Sons, Ltd.