Title :
Capacity-Maximization Threshold Design for Wideband Sensing with Guaranteed Minimum Primary-User Rate
Author :
Jia, Peng ; LE-NGOC, THO
Author_Institution :
Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, QC, Canada
Abstract :
We investigate the design of optimal threshold for energy detection of primary-user (PU) beacon signals in spectrum sensing. The weighted sum of the PU and secondary-user (SU) link rates is used as the objective function with constraint on the guaranteed minimum PU link rate. SU with wideband sensing capability selects the idle frequency-slot with the lowest sensed power to be the candidate to access. Numerical results show that the wideband sensing capability with the proposed optimal threshold and accessing strategy can help the SU to meet the stringent PU rate constraints while achieving much higher SU link rate and network capacity.
Keywords :
broadband networks; channel capacity; cognitive radio; radio spectrum management; signal detection; beacon signal detection; capacity maximization threshold design; energy detection; idle frequency slot; network capacity; objective function; wideband spectrum sensing; FCC; Interference; Numerical models; Receivers; Sensors; Transmitters; Wideband;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2011 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4244-8328-0
DOI :
10.1109/VETECF.2011.6093088
