Title :
Ergodic Capacity for TAS/MRC Spectrum Sharing Cognitive Radio
Author :
Blagojevic, Vesna ; Ivanis, Predrag
Author_Institution :
Fac. of Electr. Eng., Univ. of Belgrade, Belgrade, Serbia
fDate :
3/1/2012 12:00:00 AM
Abstract :
Spectrum sharing cognitive radio with transmit antenna selection and maximal ratio combining is analyzed, under the peak interference constraint at the primary user receiver. The ergodic capacity of the secondary link with an arbitrary number of transmit and receive antennas is derived, for the case of Rayleigh fading and transmit power constraint. For the case of unlimited transmit power, the closed-form expression for the capacity is derived. The correctness of analytical results is verified by using an independent simulation model.
Keywords :
Rayleigh channels; cognitive radio; radiofrequency interference; receiving antennas; Rayleigh fading; TAS-MRC spectrum sharing cognitive radio; antenna selection; closed-form expression; ergodic capacity; independent simulation model; interference constraint; maximal ratio combining; power constraint; primary user receiver; Cognitive radio; Diversity reception; Fading; Interference; Receiving antennas; Transmitting antennas; Ergodic capacity; Rayleigh fading; maximal ratio combining; spectrum sharing; transmit antenna selection;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.011312.111488
