Singular Value Decomposition-Based Algorithm for Suppression of IEEE 802.11 a Interference in TH-PAM UWB Systems

Narrow-band interference (NBI) from the coexisting narrowband 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 will 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 pulse amplitude modulation UWB (TH-PAM UWB) systems. SVD is used to approximate the interferences which then are subtracted from the received signals. The algorithm precision and closed-form bit error rate (BER) expression are derived in wireless multipath channel. By comparing our algorithm with the conventional suppression methods such as notch filter and RAKE receiver, we could conclude that the proposed method is simple and robust, it is especially suitable for UWB systems