| 检测门限与中继用户配置的快速优化 |
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| 引用本文： | 张晓格,张士兵,邱恭安. 检测门限与中继用户配置的快速优化[J]. 计算机工程与应用, 2012, 48(24): 117-121 |
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| 作者姓名： | 张晓格 张士兵 邱恭安 |
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| 作者单位： | 南通大学电子信息学院,江苏南通,226019 |
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| 基金项目： | 国家自然科学基金(No.61071086);南通市应用研究计划项目(No.BK2011064,No.BK2011017,No.BK2010015) |
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| 摘 要： | 在基于数据融合的协作频谱感知中,检测门限与中继用户是影响总错误率的主要因素。为避免采用复杂度高的全搜索方法,分别提出检测门限快速优化算法以及中继用户快速优化算法。前者依据总错误率的单调性,采用二分法逐步逼近最佳检测门限;后者根据贪婪思想,渐次选择一个最佳中继用户直至总错误率不再降低。仿真结果表明在保证高频谱感知性能的前提下,两者搜索次数均远低于全搜索方法。
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| 关 键 词： | 认知无线电 协作感知 数据融合 总错误率 |
Fast optimization of detection threshold and configuration of relay users |
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| ZHANG Xiaoge , ZHANG Shibing , QIU Gong' an. Fast optimization of detection threshold and configuration of relay users[J]. Computer Engineering and Applications, 2012, 48(24): 117-121 |
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| Authors: | ZHANG Xiaoge ZHANG Shibing QIU Gong' an |
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| Affiliation: | ZHANG Xiaoge,ZHANG Shibing,QIU Gong’an College of Electronic and Information,Nantong University,Nantong,Jiangsu 226019,China |
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| Abstract: | For cooperative spectrum sensing based on data fusion,the detection threshold and the configuration of relay users have a great influence on the total error probability.To avoid the exhaustive search,two fast algorithms for the best threshold and for the best configuration are proposed.According to the monotonousness of the total error probability,the search algorithm based on dichotomy is applied to approach the best threshold step by step.The greedy algorithm selecting one best user step by step until the total error probability doesn’t decrease is also applied.Simulations show the proposed algorithms decrease the search times effectively with a high spectrum sensing performance kept. |
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| Keywords: | cognitive radio cooperative sensing data fusion total error probability |
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