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Suppression of IEEE 802.11a interference in TH-UWB systems using singular value decomposition in wireless multipath channels

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2 Author(s)
Shaoyi Xu ; UWB-ITRC, the Graduate School of Information Technology and Telecommunications, Inha University, 253, Yonghyun-dong, Nam-gu, Incheon, 402-751, Korea ; Kyung Sup Kwak

Narrow-band interference (NBI) from the coexisting narrow-band services affects the performance of ultra wideband (UWB) systems considerably due to the high power of these narrow-band signals with respect to the UWB signals. Specifically, IEEE 802.11a systems which operate around 5 GHz and overlap the band of UWB signals may interfere with UWB systems significantly. In this paper, we suggest a novel NBI suppression technique based on singular value decomposition (SVD) algorithm in time hopping UWB (TH-UWB) systems. SVD is used to approximate the interference which then is subtracted from the received signals. The algorithm precision and closed-form bit error rate (BER) expression are derived in the wireless multipath channel. Comparing with the conventional suppression methods such as a notch filter and a RAKE receiver, the proposed method is simple and robust and especially suitable for UWB systems.

Published in:

Journal of Communications and Networks  (Volume:10 ,  Issue: 1 )