期刊
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
卷 7, 期 11, 页码 4502-4507出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/T-WC.2008.070941
关键词
Cognitive radio; cooperative spectrum sensing; energy detection; hard combination; soft combination
资金
- National Science Foundation [0721580]
- Huawei Technologies Co., Ltd.
In this letter, we consider cooperative spectrum sensing based on energy detection in cognitive radio networks. Soft combination of the observed energies from different cognitive radio users is investigated. Based on the Neyman-Pearson criterion, we obtain an optimal soft combination scheme that maximizes the detection probability for a given false alarm probability. Encouraged by the performance gain of soft combination, we further propose a new softened hard combination scheme with two-bit overhead. for each user and achieve a good tradeoff between detection performance and complexity.
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