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

Volume

16

Issue

9

fYear

2012

fDate

9/1/2012 12:00:00 AM

Firstpage

1500

Lastpage

1503

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;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.072012.120713

Filename

6249699