Detection probability analysis of cooperative spectrum sensing with the N<sup>th</sup>best relay selection

Xiao-ge ZHANG; Shi-bing ZHANG; Gong-an QIU

doi:1000-436X(2011)11-0176-07

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Detection probability analysis of cooperative spectrum sensing with the N^thbest relay selection

Correspondences | 更新时间：2024-06-05

- Detection probability analysis of cooperative spectrum sensing with the N^thbest relay selection
- Journal on Communications Vol. 32, Issue 11, Pages: 176-182(2011)
- 作者机构：
- 作者简介：
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- DOI：1000-436X(2011)11-0176-07
  CLC： TN929.53
- Online First：2011-11，
  
  Published：25 November 2011
- 稿件说明：
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Xiao-ge ZHANG, Shi-bing ZHANG, Gong-an QIU. Detection probability analysis of cooperative spectrum sensing with the N^thbest relay selection[J]. Journal on Communications, 2011, 32(11): 176-182.
DOI：

Xiao-ge ZHANG, Shi-bing ZHANG, Gong-an QIU. Detection probability analysis of cooperative spectrum sensing with the N^thbest relay selection[J]. Journal on Communications, 2011, 32(11): 176-182. DOI： 1000-436X(2011)11-0176-07.

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。

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 N

best relay may be selected for various reasons.Therefore

the cooperative spectrum sensing based on the N

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 even below the one of the arbitrary selection as N increases

and that the one based on the optimal or suboptimal selection increases obviously but the one based on the worst or near worst selection decreases slightly as n increases.

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references

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Detection probability analysis of cooperative spectrum sensing with the Nthbest relay selection

DOI：1000-436X(2011)11-0176-07

摘要

Abstract

关键词

Keywords

references

Detection probability analysis of cooperative spectrum sensing with the N^thbest relay selection