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Improved Channel Estimation for Selective RAKE Receiver in LR-UWB System  

Kwon, Soon-Koo (연세대학교 전기전자공학과 정보통신SoC설계 연구실)
Jung, Yun-Ho (한국항공대학교 항공전자 및 전자통신공학부)
Kim, Jae-Seok (연세대학교 전기전자공학과 정보통신SoC설계 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.1C, 2009 , pp. 138-144 More about this Journal
Abstract
This paper proposes an efficient scheme to estimate the channel parameters such as channel gain and delay for the IEEE802.15.4a LR-UWB systems. Sliding window (SW) method is generally used for the channel estimation of LR-UWB systems, which extracts the channel parameters by performing the cross-correlation with the repeatedly transmitted signal. However, the SW method experiences the severe performance degradation because the cross-correlation is performed just once for the received signal. In this paper, we propose a novel channel estimation scheme, which can achieve a great performance gain by performing the cross-correlation repeatedly with the repeated receive signal. In order to verify the performance gain of the proposed scheme, we performed the intensive simulation with the Saleh-Valenzuela channel model. Simulation results show that the proposed scheme has a performance improvement of 4dB compared to the conventional SW channel estimation scheme.
Keywords
LR-UWB; IEEE802.15.4a; S-Rake Receiver; Preamble; Channel Estimation;
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