Title :
Soft versus hard cooperative energy detection under low SNR
Author :
Shen, Junyang ; Liu, Siyang ; Zhang, Ranran ; Liu, Yuanan
Author_Institution :
Sch. of Telecommun. Eng., Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
Amidst conflicting views about whether soft cooperative energy detection scheme (SCEDS) outperforms hard cooperative energy detection scheme (HCEDS) greatly in cognitive radio, we establish the bridge that mathematically connects SCEDS and HCEDS by closed approximations. Through this bridge, it is demonstrate that, if the number of detectors of HCEDS is 1.6 times as that of SCEDS, they have nearly the same performance which is confirmed by numerical simulations, enabling a quantitative evaluation of the relation between them and an elucidation of the conflicting views.
Keywords :
cognitive radio; SNR; closed approximations; cognitive radio; hard cooperative energy detection scheme; quantitative evaluation; signal-to-noise ratio; soft cooperative energy detection scheme; AWGN; Additive white noise; Bridges; Cognitive radio; Detectors; Interference; Numerical simulation; Power engineering and energy; Resource management; Signal processing;
Conference_Titel :
Communications and Networking in China, 2008. ChinaCom 2008. Third International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4244-2373-6
Electronic_ISBN :
978-1-4244-2374-3
DOI :
10.1109/CHINACOM.2008.4684985
