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| Energy Detection Algorithm Investigation Based on Cooperative in Cognitive Radio Systems |
| Yu Gui-cai; Luo Tao; Yue Guang-xin |
Laboratory of Wireless Communication Systems and Networks,
Beijing University of Posts and Telecommunications, Beijing 100876, China;Key Laboratory of Universal Wireless Communications (Beijing University of Posts and Telecommunications |
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Abstract In this paper, detection performance and detection sensitivity with detection duration and noise average power fluctuation in short time is investigated firstly. Performance accuracy and detection sensitivity drop quickly with noise average power fluctuation increasing and it is worse when signal-to-noise ratio lower. Considering the characteristic, a novel new energy detection algorithm based on cooperative is presented. Simulations show that the proposed scheme improves antagonism of noise average power fluctuation in short time and gets a good detection performance as long as increasing the number of cooperative detection users.
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Received: 26 November 2008
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2009, Vol. 31 
