n-out-of-K融合规则下增量式协作感知算法

doi:10.3969/j.issn.1000-436x.2012.z2.014

摘要/Abstract

摘要：

该算法把协作中继分为前N个与后K?N个两部分，首先在前N个中继中感知，若不多于m_L个中继检测到主用户或不少于m_H个中继检测到主用户，则全局判定为存在或不存在频谱空洞；否则继续在后K?N个中继中感知，只有当前后两次感知不少于n个中继检测到主用户时则才全局判定不存在频谱空洞。在满足虚警概率与检测概率的前提下，构建最小化时隙消耗的目标函数，优化参数m_L、m_H与N。模拟表明，通过合理设置这些参数，在保证感知性能的前提下，所提增量协作算法的平均时隙消耗明显低于传统协作感知。

关键词: 认知无线电, 频谱感知, 增量协作, 时隙消耗

Abstract:

The algorithm divided the total relays into two subsections.The front subsection included N number of relays,and the later one included K?N number of relays.Firstly,the front N relays sensed the spectrum.If no more than m_L number of relays had detected the existing of the primary user,the global detection was that the spectrum holes existed.If more than m_H number of relays had detected the existing of the primary user,the global detection was that no spectrum holes existed.Otherwise,the later K?N number of relays continued to sense the spectrum.The global detection was that the spectrum holes existed only when there were totally over n number of relays having detected the existing of the primary user in the two sensing stages.The object function was built for minimizing the time-slot consumption by adjusting the parameters m_L,m_H and N with the limit of detection probability and false probability.Simulation results show that the proposed incremental cooperative spectrum sensing algorithm has much lower time-slot consumption than the traditional one by properly setting the parameters with high sensing performance kept.

Key words: cognitive radio, spectrum sensing, incremental cooperative, time-slot consumption

张晓格,张士兵,邱恭安. n-out-of-K融合规则下增量式协作感知算法[J]. 通信学报, 2012, 33(Z2): 111-117.

Xiao-ge ZHANG,Shi-bing ZHANG,Gong-an QIU. Incremental cooperative spectrum sensing algorithm with n-out-of-K fusion rule[J]. Journal on Communications, 2012, 33(Z2): 111-117.

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参考文献 12

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第一部分（前6个中继）		第二部分（后6个中继）
本地检测到主用户的中继数量	概率	本地检测到主用户的中继数量	概率
0	0.004 096	7（含）个以上	0
1	0.036 864	6（含）个以上	0.046 656
2	0.138 24	5（含）个以上	0.233 28
3	0.276 48	4（含）个以上	0.544 32
4	0.311 04	3（含）个以上	0.820 8
5	0.186 624	2（含）个以上	0.959 04
6	0.046 656	1（含）个以上	0.995 904

	SNR(dB)	0	2	4	6	8	10
时隙消耗	K=12，n=7	10.522 0	10.454 1	9.585 4	8.308 0	6	6
	K=20，n=12	17.231 7	17.159 6	16.477 8	13.478 4	11	11
N	K=12，n=7	7	7	8	6	6	6
	K=20，n=12	11	11	11	12	11	11
m_L	K=12，n=7	2	2	3	2	3	3
	K=20，n=12	4	4	4	6	7	7
m_H	K=12，n=7	6	6	6	5	4	4
	K=20，n=12	9	9	9	9	8	8

	SNR(dB)	0	2	4	6	8	10
时隙消耗	K=12，n=7	8.347 0	8.300 5	8	6	6	6
	K=20，n=12	14.489 1	14.407 41	13.823 7	11.895 8	11	11
N	K=12，n=7	7	7	8	6	6	6
	K=20，n=12	11	11	11	11	11	11
m_L	K=12，n=7	3	3	4	3	3	3
	K=20，n=12	5	5	5	6	7	7
m_H	K=12，n=7	5	5	5	4	4	4
	K=20，n=12	8	8	8	8	8	8

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