【作者】 吴呈瑜； 何晨； 蒋铃鸽；

【Author】 WU Cheng-yu HE Chen JIANG Ling-ge (Department of Electronic Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

【机构】 上海交通大学电子工程系；

【摘要】 针对当前认知无线电中频谱切换的研究,结合频谱感知算法和策略,研究基于合作感知的频谱切换,在有效提高频谱检测概率的同时最小化频谱切换开销。本文采用认知无线电用户组的方式组建认知无线电网络,以周期性感知方法来避免与主用户的冲突,分析频谱感知以及频谱切换的开销,以最小化频谱切换的开销为目标,求解最优的合作感知用户和频段感知数,并通过仿真验证理论结果,得出认知无线电用户间的有效合作可以提高检测概率,降低频谱切换开销。更多还原

【Abstract】 Cooperative spectrum handoff based on spectrum sensing algorithms and strategies is studied for spectrum handoff in cognitive radio networks,it effectively enhances the probability of spectrum detection and minimize the overhead of spectrum handoff.We apply cognitive radio users’ group to construct cognitive radio networks,and use the general periodic sensing method to reduce and avoid conflicts with the primary users.Then we analysis the overhead of spectrum sensing and spectrum handoff,form the objective function to minimize the overhead of spectrum handoff. Numerical results show that the proposed scheme can effectively increase the detection probability and reduce the handoff overhead.更多还原