Multiple-Antenna Receiving and Frequency Domain Equalization in Transmitted-Reference UWB Systems

Xuewen LIAO  Shihua ZHU  Erlin ZENG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E91-B   No.7   pp.2405-2408
Publication Date: 2008/07/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.7.2405
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
transmitted-reference,  Ultra-Wideband,  multiple-antenna receiving,  frequency domain equalization,  

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Summary: 
A multiple-antenna receiving and combining scheme is proposed for high-data-rate transmitted-reference (TR) Ultra-Wideband (UWB) systems. The nonlinearity of the inter-symbol interference (ISI) model is alleviated via simple antenna combining. Under the simplified ISI model, frequency domain equalization (FDE) is adopted and greatly reduces the complexity of the equalizer. A simple estimation algorithm for the simplified ISI model is presented. Simulation results demonstrate that compared to the single receive antenna scheme, the proposed method can obtain a significant diversity gain and eliminate the BER floor effect. Moreover, compared to the complex second-order time domain equalizer, FDE showed better performance robustness in the case of imperfect model estimation.