计算机网络
无线
频道(广播)
干扰(通信)
资源配置
作者
Edward Peh,Ying-Chang Liang,Yong Liang Guan
出处
期刊:International Conference on Communications
日期:2009-06-14
卷期号:: 3521-3525
被引量:36
标识
DOI:10.1109/icc.2009.5199293
摘要
In cognitive radio networks, protection to primary users can be quantified by the probability of detection. On the other hand, the probability of false alarm affects the achievable throughput of secondary users. Performances of these two probabilities depend heavily on the fusion scheme used when cooperative sensing is performed. In this paper, we consider the case where N secondary users sense the channel cooperatively using k-out-of-Nfusion rule. A sensing-throughput tradeoff under cooperative sensing scenario is formulated to find a pair of sensing time and k value that maximize the secondary users' throughput subject to sufficient protection provided to the primary user. An iterative algorithm is proposed to obtain the optimal values of these two parameters. Computer simulations show that significant improvement of the secondary users' throughput can be achieved when the parameters from the fusion scheme and sensing time are jointly optimized.
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