A Study of Channel Estimation in Multi-Band OFDM UWB Systems

Zhu, Y; Li, C; Zheng, G

A Study of Channel Estimation in Multi-Band OFDM UWB Systems

Zhu, Y Li, C Zheng, G

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Publication Type:: Conference
Issue Date:: 2007-03-12T22:05:29Z

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Field	Value	Language
dc.contributor.author	Zhu, Y	en_AU
dc.contributor.author	Li, C	en_AU
dc.contributor.author	Zheng, G	en_AU
dc.date.accessioned	2007-03-12T22:05:29Z
dc.date.accessioned	2012-12-15T02:29:47Z
dc.date.available	2007-03-12T22:05:29Z
dc.date.available	2012-12-15T02:29:47Z
dc.date.issued	2007-03-12T22:05:29Z
dc.identifier.uri	http://hdl.handle.net/10453/19672
dc.description.abstract	In this paper, the channel estimation techniques for multiband (MB) OFDM ultra-wideband (UWB) wireless communications are investigated. By combining orthogonal frequency-division multiplexing (OFDM) with multi-band, the MB-OFDM systems can capture multipath energy more efficiently than single-band direct sequence UWB (DS-UWB). However, most researches for UWB channel estimation are focused on the latter. Through the analysis of architecture, signal and channel model of MB-OFDM UWB wireless systems, we studied the channel estimation techniques based on preamble training sequences and pilot sub-carriers respectively. Further more, the linear estimations of least square (LS) and minimum mean square error (MMSE) are analysed and compared under different UWB channel conditions. The characteristic of estimation error changing with the SNR is also discussed. The estimation error includes the impact of interpolation error and channel noise.	en_AU
dc.format.extent	240391 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en_AU
dc.relation.replaces	http://hdl.handle.net/2100/69
dc.title	A Study of Channel Estimation in Multi-Band OFDM UWB Systems	en_AU
dc.type	Conference
utslib.copyright.status	open_access

Abstract:

In this paper, the channel estimation techniques for multiband (MB) OFDM ultra-wideband (UWB) wireless communications are investigated. By combining orthogonal frequency-division multiplexing (OFDM) with multi-band, the MB-OFDM systems can capture multipath energy more efficiently than single-band direct sequence UWB (DS-UWB). However, most researches for UWB channel estimation are focused on the latter. Through the analysis of architecture, signal and channel model of MB-OFDM UWB wireless systems, we studied the channel estimation techniques based on preamble training sequences and pilot sub-carriers respectively. Further more, the linear estimations of least square (LS) and minimum mean square error (MMSE) are analysed and compared under different UWB channel conditions. The characteristic of estimation error changing with the SNR is also discussed. The estimation error includes the impact of interpolation error and channel noise.

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http://hdl.handle.net/10453/19672