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Reduced-rank adaptive least bit-error-rate detection in hybrid direct-sequence time-hopping ultrawide bandwidth systems

Ahmed, Qasim, Yang, Lie-Liang and Chen, Sheng (2011) Reduced-rank adaptive least bit-error-rate detection in hybrid direct-sequence time-hopping ultrawide bandwidth systems IEEE Transactions on Vehicular Technology, 60, (3), pp. 849-857.

Record type: Article


Design of high-efficiency low-complexity detection schemes for ultrawide bandwidth (UWB) systems is highly challenging. This contribution proposes a reduced-rank adaptive multiuser detection (MUD) scheme operated in least bit-errorrate (LBER) principles for the hybrid direct-sequence timehopping UWB (DS-TH UWB) systems. The principal component analysis (PCA)-assisted rank-reduction technique is employed to obtain a detection subspace, where the reduced-rank adaptive LBER-MUD is carried out. The reduced-rank adaptive LBERMUD is free from channel estimation and does not require the knowledge about the number of resolvable multipaths as well as the knowledge about the multipaths’ strength. In this contribution, the BER performance of the hybrid DS-TH UWB systems using the proposed detection scheme is investigated, when assuming communications over UWB channels modeled by the Saleh-Valenzuela (S-V) channel model. Our studies and performance results show that, given a reasonable rank of the detection subspace, the reduced-rank adaptive LBER-MUD is capable of efficiently mitigating the multiuser interference (MUI) and inter-symbol interference (ISI), and achieving the diversity gain promised by the UWB systems.

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Published date: 3 March 2011
Organisations: Southampton Wireless Group


Local EPrints ID: 272076
ISSN: 0018-9545
PURE UUID: 2c8d2d17-b1da-46d3-ba16-1e2613b6551d
ORCID for Lie-Liang Yang: ORCID iD

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Date deposited: 01 Mar 2011 21:57
Last modified: 18 Jul 2017 06:34

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Author: Qasim Ahmed
Author: Lie-Liang Yang ORCID iD
Author: Sheng Chen

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