Title :
Compressed wideband spectrum sensing with correlated subband occupancy in multi-antenna cognitive radios
Author :
Monfared, Shaghayegh S M ; Taherpour, Abbas ; Khattab, Tamer
Author_Institution :
Dept. of Electr. Eng., Imam Khomeini Int. Univ., Qazvin, Iran
Abstract :
In this paper, we investigate the use of multiple antennas at the cognitive radio receiver for improved wideband spectrum sensing and exploit compressed sensing to reduce the extremely high sampling rate of wideband signal. Using a priori statistical knowledge about the non-zero coefficients of the sparse primary user signal, we propose two novel multiband compressive detectors to detect the presence of primary user signal within frequency subbands while the occupancies of these are correlated. Therefore, we model the occupancy of each subband as a binary random variable and assume subband energies are linearly combined. The simulation results evaluate the performance of the proposed compressive detectors compared to existing compressive detectors and the traditional energy detectors.
Keywords :
antenna arrays; broadband antennas; broadband networks; cognitive radio; compressed sensing; correlation methods; radio receivers; random processes; signal detection; signal reconstruction; signal sampling; statistical analysis; binary random variable; compressed wideband spectrum sensing; correlated subband occupancy; frequency subband energy detector; multiantenna cognitive radio receiver; multiband compressive detector; nonzero coefficient; sparse primary user signal detector; statistical knowledge; wideband signal sampling rate; Antenna measurements; Antennas; Detectors; Random variables; Vectors; Wideband;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2012 IEEE 23rd International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
978-1-4673-2566-0
Electronic_ISBN :
2166-9570
DOI :
10.1109/PIMRC.2012.6362719