Title :
Compensation of link distortion for cognitive WPMCM UWB system
Author :
Hosseini, Haleh ; Fisal, Norsheila ; Syed-Yusof, Sharifah K.
Author_Institution :
Fac. of Electr. Eng., Univ. Teknol. Malaysia, Skudai, Malaysia
Abstract :
Cognitive radio performs efficient utilization of available communication resources. Cognitive ultra wideband (UWB) system is a tempting candidate for short range and high data rate communication with low cost, and low power consumption. Wavelet packet based multicarrier modulation (WPMCM) UWB has inherent potential to fulfill cognitive radio requirements. In this research, we survey the literature on cognitive radio sensing mechanism in the presence of distortion and propose a novel link effect compensation accompanied by power loading, to mitigate the effects of interference from primary signal. Wavelet transform is used for spectrum sensing, and Lagrange multiplier applied for power allocation to minimize the bit error rate at the receiver. System performance is investigated by MATLAB to compare the system under different UWB channel models.
Keywords :
cognitive radio; interference suppression; modulation; radiofrequency interference; ultra wideband communication; wavelet transforms; Lagrange multiplier; Matlab; UWB channel model; bit error rate; cognitive WPMCM UWB system; cognitive radio sensing mechanism; high-data rate communication; interference mitigation; link distortion compensation; link effect compensation; power allocation; power loading; short-range communication; spectrum sensing; ultrawideband system; wavelet packet-based multicarrier modulation; wavelet transform; Bit error rate; Channel estimation; Cognitive radio; Fading; Interference; Loading; Sensors; Cognitive radio; Power loading; Ultra wideband; Wavelet packet transform;
Conference_Titel :
Communications (APCC), 2011 17th Asia-Pacific Conference on
Conference_Location :
Sabah
Print_ISBN :
978-1-4577-0389-8
DOI :
10.1109/APCC.2011.6152835
