Title :
Ergodic Capacity of Spectrum Sharing Systems with OSTBC in Nakagami Fading
Author :
Blagojevic, Vesna ; Ivanis, Predrag
Author_Institution :
Fac. of Electr. Eng., Univ. of Belgrade, Belgrade, Serbia
fDate :
9/1/2012 12:00:00 AM
Abstract :
The spectrum sharing system employing orthogonal space-time block codes (OSTBCs) with both interference and transmit power constraints is analyzed in Nakagami fading environment, for an arbitrary number of transmit and receive antennas of the secondary user (SU). The closed-form expression for the probability density function of the signal-to-noise ratio at the SU receiver is derived. The ergodic capacity expression is derived in the exact closed-form under both interference and transmit power constraints. The analytical results are verified by using an independent simulation method.
Keywords :
Nakagami channels; cognitive radio; orthogonal codes; probability; radio receivers; radio transmitters; radiofrequency interference; receiving antennas; space-time block codes; transmitting antennas; Nakagami fading environment; OSTBC; SU receiver; closed-form expression; ergodic capacity expression; independent simulation method; interference; orthogonal space-time block code; power transmission constraint; probability density function; receiving antenna; secondary user receiver; signal-to-noise ratio; spectrum sharing system; transmitting antenna; Cognitive radio; Interference; Nakagami distribution; Rayleigh channels; Receiving antennas; Ergodic capacity; Nakagami fading; orthogonal space-time block codes (OSTBCs); spectrum sharing;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.072012.120713
