Reduced-Complexity ML Multi-User Detection for Dispersive UWB Signal Based on Combined Stack and Viterbi Trellis Search
- Weiyu Xu ,
- Zhenqi Chen ,
- Zihua Guo ,
- Richard Yao
Published by Institute of Electrical and Electronics Engineers, Inc.
We propose a novel reduced-complexity maximum-likelihood (ML) detector for multi-user impulse radio ultra-wideband (UWB) signals in multi-path channels. By utilizing the unique trellis feature of a multi-user impulse radio UWB signal, and introducing a novel combined stack and Viterbi based trellis search (CSVS) algorithm, the proposed detector is optimal and enjoys much lower computation complexity compared with the brute-force search based ML detector. Simulation results show that the proposed detector achieves much better performance than the conventional simple matched filter UWB detector.
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