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2013 (Vol. 5, Issue: 03)
Article Information:

A Sequential Energy Detection Based Spectrum Sensing Scheme in Cognitive Radio

Xiong Zhang and Zhengding Qiu
Corresponding Author:  Xiong Zhang 

Key words:  Cognitive radio, Spectrum sensing, Energy detector, Sequential probability ratio test, , ,
Vol. 5 , (03): 1002-1007
Submitted Accepted Published
June 23, 2012 July 31, 2012 January 21, 2013

Reliable and swift spectrum sensing is a crucial technical challenge of cognitive radio. This study proposes a Sequential Energy Detection (SED) scheme to reduce the average required sample number and sensing time for spectrum sensing in low signal-to-noise ratio regime. In the scheme, the data samples are first grouped into data blocks and the Sequential Probability Ratio Test (SPRT) use the energies of the data blocks as the statistic variables. The resulting detection rule exhibits simplicity in implementation and in analysis and retains the high sample-efficiency of sequential probability ratio test. The detection performance in terms of Average Sample Number (ASN) is evaluated theoretically. Simulation results are provided to verify the theoretical analysis.
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  Cite this Reference:
Xiong Zhang and Zhengding Qiu, 2013. A Sequential Energy Detection Based Spectrum Sensing Scheme in Cognitive Radio.  Research Journal of Applied Sciences, Engineering and Technology, 5(03): 1002-1007.
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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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