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Operating around 5 GHz, IEEE 802.11a systems overlap the band of UWB signals will interfere with UWB systems significantly. In this paper, a novel narrow-band interferences (NBI) suppression technique based on singular value decomposition (SVD) algorithm is presented in direct sequence ultra-wideband (DS-UWB) system. SVD is used to approximate the interferences which then are subtracted from the received...
In this paper, a resource reservation scheme for handoff using location-aided mobility prediction is proposed for wireless cellular networks. We analyze the performance of the proposed scheme and propose a two-dimensional random walk model for performance evaluation. The influences of threshold distance, average distance where the mobile station moves along a straight line and location error are investigated...
This paper addresses pilot-aided multiuser least square (LS) channel estimation for the uplink of MIMO-OFDM systems. The systems under consideration allow all users use all available subcarriers independently and thus involve multiuser interference in the frequency domain. We develop the decentralized and centralized channel estimation algorithms according to different multiuser scenarios. Optimal...
We study the channel model for IEEE 802.15.4a which is different from general channel model or the IEEE 802.15.3a channel model. Under the IEEE 802.15.4a channel environments, performance of TH-BPPM and TH-BPSK systems using S-Rake and P-Rake is evaluated. In the 802.15.4a system, complexity and cost are two important issues which need to be taken into consideration. The complexity of detection can...
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...
Coexisting with many concurrent narrowband services, the performance of UWB systems are affected considerably by them 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, a novel narrow-band interferences (NBI)...
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