A Simplified Spectrum Sensing Scheme under Multiple Primary Transmit Power

Author

Qing Lv ; Feifei Gao ; Han Qian ; Tao Jiang

Author_Institution

Dept. of Electron. & Inf., Tsinghua Nat. Lab. for Inf. Sci. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China

fYear

2014

fDate

14-17 Sept. 2014

Firstpage

1

Lastpage

5

Abstract

In this paper, we consider the spectrum sensing for cognitive radio (CR) when the primary user (PU) has a set of discrete transmit powers. Different from the traditional sensing approach where the binary hypothesis testing was used, we here apply the the multiple hypotheses testing in order to not only check the ``on/off´´ status of PU but also to identify its power level. To better illustrate our idea, we set the price of erroneous sensing in Bayes risk to be unit, such that maximum a posterior (MAP) detection is optimal in terms of minimizing the total error rate. The closed expression of the decision regions as well as the performance metrics are derived. Simulation results are provided to corroborate the proposed studies.

Keywords

Bayes methods; cognitive radio; error statistics; maximum likelihood estimation; radio spectrum management; radiofrequency power transmission; signal detection; Bayes risk; CR; MAP detection; PU; binary hypothesis testing; cognitive radio; maximum a posterior detection; multiple primary discrete power transmission; performance metrics; primary user; simplified spectrum sensing scheme; total error rate minimization; Cognitive radio; Detectors; FCC; Signal to noise ratio; Wireless sensor networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Fall), 2014 IEEE 80th

Conference_Location

Vancouver, BC

Type

conf

DOI

10.1109/VTCFall.2014.6965846

Filename

6965846