Research Article
Singular Value Decomposition-Based Algorithm for Suppression of IEEE 802.11a Interference in Multiple Access TH-UWB Systems
@INPROCEEDINGS{10.1109/CROWNCOM.2007.4549781, author={Shaoyi Xu and Zhiquan Bai and Qinghai Yang and Kyung Sup Kwak}, title={Singular Value Decomposition-Based Algorithm for Suppression of IEEE 802.11a Interference in Multiple Access TH-UWB Systems}, proceedings={2nd International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2008}, month={6}, keywords={Maximal-ratio combining partial RAKE (MRC PRAKE) multi-access interference (MAI) narrow-band interference (NBI) singular value decomposition (SVD) time hopping ultra-wideband (TH-UWB)}, doi={10.1109/CROWNCOM.2007.4549781} }- Shaoyi Xu
Zhiquan Bai
Qinghai Yang
Kyung Sup Kwak
Year: 2008
Singular Value Decomposition-Based Algorithm for Suppression of IEEE 802.11a Interference in Multiple Access TH-UWB Systems
CROWNCOM
IEEE
DOI: 10.1109/CROWNCOM.2007.4549781
Abstract
Coexisting with other narrowband services, the performance of ultra wideband (UWB) systems will be affected considerably due to the high power of these narrow-band signals. Specifically, IEEE 802.11a systems which operate around 5 GHz and overlap the band of UWB signals will interfere with UWB systems significantly. In this paper, we suggest a novel narrow-band interference (NBI) suppression technique based on the singular value decomposition (SVD) algorithm in multi-access time hopping UWB (TH-UWB) systems. SVD is used to approximate the NBI which then is subtracted from the received signals. Pulse amplitude modulation (PAM) and pulse position modulation (PPM) are considered. In contrast to the conventional suppression methods such as the notch filter and the maximal-ratio combining partial RAKE (MRC PRAKE) receiver, our proposed technique is simple and robust, the hardware complexity of the receiver can be reduced greatly even in the presence of multi-access interference (MAI).