Title :
Enhanced Channel Estimation for Multiband Ultra-Wideband Systems
Author :
Lin, Li-Hsieh ; Wen, Kuci-Ann ; Hsieh, Chung-Hsien
Author_Institution :
Dept. of Electr. Eng., Nat. Chiao Tung Univ., Hsinchu
Abstract :
This study presents multiband ultra-wideband (UWB) communication system with IEEE 802.15.3a standard, which utilizes multicarrier transmission with orthogonal frequency-division multiplexing (OFDM) technology. In this paper, based on a statistical autoregressive (AR) channel model in the frequency domain, we proposed an algorithm that can adaptively track the channel time-variation which is subject to shadowing with line-of-sight (LOS) and non-LOS (NLOS). The algorithm is capable of simultaneously estimating the parameters of the AR process and the channel frequency response. Our results indicate that the proposed algorithm can estimate the channel more precisely over the time-varying indoor UWB channel
Keywords :
OFDM modulation; autoregressive processes; channel estimation; frequency response; frequency-domain analysis; indoor radio; time-varying channels; ultra wideband communication; wireless LAN; wireless channels; AR process; IEEE 802.15.3a standard; LOS; OFDM technology; channel frequency response; enhanced channel estimation; frequency domain analysis; line-of-sight; multiband ultrawideband system; multicarrier transmission; orthogonal frequency-division multiplexing; statistical autoregressive channel; time-varying indoor UWB channel; Channel estimation; Communication standards; Frequency division multiplexing; Frequency domain analysis; Frequency estimation; Frequency response; OFDM; Parameter estimation; Shadow mapping; Ultra wideband technology; AR channel model; multiband ultra-wideband; unscented filter;
Conference_Titel :
Information, Communications and Signal Processing, 2005 Fifth International Conference on
Conference_Location :
Bangkok
Print_ISBN :
0-7803-9283-3
DOI :
10.1109/ICICS.2005.1689051
