| 基于第N佳中继选择的协作频谱感知检测概率分析 |
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| 引用本文： | 张晓格,张士兵,邱恭安.基于第N佳中继选择的协作频谱感知检测概率分析[J].通信学报,2011,32(11):176-182. |
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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： | 国家自然科学基金资助项目，南通市应用研究计划基金资助项目，江苏省高校自然科学基金资助项目 |
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| 摘 要： | 为获得最佳感知,系统在n个备选用户中选择最佳中继进行协作感知。但实际系统可能由于各种原因选择了第二佳或乃至更为一般的第N佳中继。为此,提出基于第N佳中继选择的协作频谱感知,推导了其在瑞利平坦衰落下的检测概率,并给出闭合表达式。数值计算表明,随着N的增加,系统检测概率不断下降,乃至低于任意选择;随着n的增加,基于最佳或接近最佳选择的系统检测概率明显提高,而基于最差或接近最差选择的系统检测概率则有所下降。
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| 关 键 词： | 认知无线电 协作频谱感知 多用户分集 检测概率 |
Detection probability analysis of cooperative spectrum sensing with the Nth best relay selection |
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| ZHANG Xiao-ge,ZHANG Shi-bing,QIU Gong-an.Detection probability analysis of cooperative spectrum sensing with the Nth best relay selection[J].Journal on Communications,2011,32(11):176-182. |
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| Authors: | ZHANG Xiao-ge ZHANG Shi-bing QIU Gong-an |
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| Affiliation: | ZHANG Xiao-ge,ZHANG Shi-bing,QIU Gong-an(College of Electronic and Information,Nantong University,Nantong 226019,China) |
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| Abstract: | In the cognitive radio system,the optimal relay would be selected from the n available ones to obtain the best sensing performance.However,in actual systems,the secondary or even the more general Nth best relay may be selected for various reasons.Therefore,the cooperative spectrum sensing based on the Nth best relay selection was proposed.The closed-form expression of the detection probability was derived in Rayleigh fading channels.Numerical results show that the detection probability declines continuously... |
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| Keywords: | cognitive radio cooperative spectrum sensing multiuser diversity detection probability |
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