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

Abstract

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

CLC Number:

TN929.52

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.

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

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