Title :
Cooperative Spectrum Sensing Scheme over Imperfect Feedback Channels
Author_Institution :
Sch. of Electr. & Electron. Eng., Chung-Ang Univ., Seoul, South Korea
Abstract :
A practical cooperative spectrum sensing scheme suitable for wireless cognitive radio with imperfect feedback channels is proposed. In the proposed scheme, binary local decision bits are transmitted over feedback channels and combined to form a soft-valued decision statistics by a "majority-decision-aided" weighting rule in the fusion center. The proposed scheme provides high sensing reliability with avoiding overhead problems caused by imperfect feedback channels such as bandwidth expansion and instantaneous channel estimation.
Keywords :
channel estimation; cognitive radio; cooperative communication; decision theory; feedback; radio spectrum management; radio transmitters; sensor fusion; signal detection; telecommunication network reliability; wireless channels; bandwidth expansion; binary local decision bit transmission; cooperative spectrum sensing scheme; fusion center; imperfect feedback channel; instantaneous channel estimation; majority-decision-aided weighting rule; sensing reliability; soft-valued decision statistics; wireless cognitive radio; Channel estimation; Cognitive radio; Probability density function; Sensor fusion; Signal to noise ratio; Wireless sensor networks; Cooperative spectrum sensing; feedback channel; fusion rule; wireless cognitive radio;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2013.050313.130531
