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http://dx.doi.org/10.4218/etrij.11.0211.0046

Enhanced FCME Thresholding for Wavelet-Based Cognitive UWB over Fading Channels  

Hosseini, Haleh (Department of Electrical Engineering, Universiti Teknologi Malaysia)
Fisal, Norsheila (Department of Electrical Engineering, Universiti Teknologi Malaysia)
Syed-Yusof, Sharifah Kamilah (Department of Electrical Engineering, Universiti Teknologi Malaysia)
Publication Information
ETRI Journal / v.33, no.6, 2011 , pp. 961-964 More about this Journal
Abstract
The cognitive ultra-wideband (UWB) network detects interfering narrowband systems and adapts its configuration accordingly. An inherently adaptive and flexible candidate for cognitive UWB transmission is the wavelet packet multicarrier modulation (WPMCM). In this letter, we use an enhanced forward consecutive mean excision thresholding algorithm to tackle the noise uncertainty in the wavelet-based sensing of WPMCM systems, and mathematical analysis is performed for primary user channel fading. As a benchmark, we compare the proposed system with a conventional fast Fourier transformation-based system, and performance investigation proves significant improvements when primary and secondary links are subjected to multipath fading and noise.
Keywords
Channel fading; cognitive ultra-wideband; forward consecutive mean excision; spectrum sensing; wavelet packet transform;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 0
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