认知网络中控制信道受限的协作频谱感知

doi:10.3969/j.issn.1001-2400.2011.05.008

J4 ›› 2011, Vol. 38 ›› Issue (5): 46-51.doi: 10.3969/j.issn.1001-2400.2011.05.008

认知网络中控制信道受限的协作频谱感知

宋朝霞^1,2;周正¹;孙璇¹

(1. 北京邮电大学信息与通信工程学院，北京 100876;
2. 北京工业职业技术学院信息工程系，北京 100042)

收稿日期:2010-08-19 出版日期:2011-10-20 发布日期:2012-01-14
通讯作者: 宋朝霞
作者简介:宋朝霞(1978-)，女，讲师，北京邮电大学博士研究生，E-mail: songzhaoxia@gmail.com
基金资助:
国家科技重大专项基金资助项目(2009ZX03006-009); 韩国知识经济部仁荷大学ITRC基金资助项目(NIPA-2011-C1090-1111-0007)

Cooperative spectrum sensing over the constrained control channel in cognitive radio networks

SONG Zhaoxia^1,2;ZHOU Zheng¹;SUN Xuan¹

(1. School of Telecomm. Eng., Beijing Univ. of Posts and Telecomm., Beijing 100876， China;
2. Dept. of Info. Eng., Beijing Polytechnic College, Beijing 100042， China)

Received:2010-08-19 Online:2011-10-20 Published:2012-01-14
Contact: SONG Zhaoxia

摘要/Abstract

摘要：

在噪声不确定的条件下，提出一种多频带联合协作感知方法，根据各频段噪声功率的不确定度分别计算出检测门槛上、下限后对本地主用户信号进行多频带联合检测．接收信号能量处于检测门槛上下限之间的频段为本地检测结果不确定的频段，需要进行多点协作频谱感知，认知节点可利用本地检测中确定空闲的频段来传递本节点的感知信息，实现由本节点可用信道分担传统协作感知方法中控制信道通信量的目标．仿真结果表明，对比传统协作感知方法，新提出的协作感知方法能有效减少频谱感知过程中控制信道的通信负载，并且在本地检测结果为不确定的频段能获得更小的误警概率．

关键词: 认知无线电, 协作频谱感知, 通信负载

Abstract:

This paper presents a multiband joint cooperative spectrum sensing scheme. For the local detection of each frequency band, two thresholds can be calculated according to noise uncertainty and a secondary user can decide whether there are primary users who utilize multiband joint detection. For the uncertain frequency band with its test statistic falling into the two local detection thresholds, the multi-point cooperative spectrum sensing is performed. In this scheme, secondary users transfer the sensing information by utilizing the idle frequency bands, rather than only depending on the common control channel. Analytical and simulation results show that the new scheme can decrease the communication overhead of the common control channel and obtain a smaller miss alarm probability for the uncertain spectrum bands compared to traditional cooperative sensing schemes.

Key words: cognitive radio, cooperative spectrum sensing, communication overhead

中图分类号:

TN929.52

宋朝霞;周正;孙璇. 认知网络中控制信道受限的协作频谱感知[J]. J4, 2011, 38(5): 46-51.

SONG Zhaoxia;ZHOU Zheng;SUN Xuan. Cooperative spectrum sensing over the constrained control channel in cognitive radio networks[J]. J4, 2011, 38(5): 46-51.

参考文献

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认知网络中控制信道受限的协作频谱感知

Cooperative spectrum sensing over the constrained control channel in cognitive radio networks

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