Title :
An Adaptive Interference-Avoiding System for DS-UWB Cognitive Radio
Author :
Yang, Rumin ; Zhou, Zheng
Author_Institution :
Lab. of Wireless Network, Beijing Univ. of Posts & Telecommun.
Abstract :
This paper addresses the problem of interfering with narrowband licensed users caused by DS-UWB systems. Deducting the colliding frequency band from UWB spectrum, and then employing orthonormal expansion by Hermite-Gaussian functions, the paper develops a low-complexity algorithm for generating DS-UWB signals that adaptively avoid or recover arbitrary colliding bands. A system implementing this algorithm is suggested. Performance comparison with matured seventh Gaussian derivative shows that our system achieves about 1.5 dB signal-to-noise gain and 52.2 dB signal-to-interference gain over the referenced system in AWGN environment
Keywords :
Gaussian processes; cognitive radio; radiofrequency interference; spread spectrum communication; ultra wideband communication; AWGN environment; DS-UWB cognitive radio; Hermite-Gaussian functions; adaptive interference-avoiding system; colliding frequency band; narrowband licensed users; signal-to-interference gain; signal-to-noise gain; AWGN; Adaptive systems; Cognitive radio; FCC; Frequency; Interference; Narrowband; Performance gain; Sampling methods; Wavelet domain; Cognitive radio; DS-UWB; Hermite-Gaussian functions; Soft defined radio;
Conference_Titel :
Communications and Networking in China, 2006. ChinaCom '06. First International Conference on
Conference_Location :
Beijing
Print_ISBN :
1-4244-0463-0
Electronic_ISBN :
1-4244-0463-0
DOI :
10.1109/CHINACOM.2006.344820
