Open AccessPerformance analysis of multi‐user scheduling in a spectrum sharing with OSTBC under correlated antennas in a cognitive radio system
Author(s) -
Torabi Mohammad,
Haccoun David
Publication year - 2018
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2017.0338
Subject(s) - cognitive radio , computer science , scheduling (production processes) , rayleigh fading , cumulative distribution function , probability density function , fading , algorithm , channel (broadcasting) , electronic engineering , telecommunications , mathematical optimization , wireless , mathematics , statistics , engineering
This study presents a performance analysis for a cognitive radio network with multi‐user scheduling in which a primary user can share its licenced spectrum with several secondary users (SUs), each employing Alamouti orthogonal space‐time block coding (OSTBC) with spatially correlated antennas over Rayleigh fading channels. Closed‐form formulae are obtained for the cumulative density function of the signal‐to‐noise‐ratio of SUs with multi‐user scheduling under correlated antennas. Closed‐form mathematical expressions are then derived for three important system performance metrics: the average channel capacity, outage probability, and the average bit error rate of the system. From the numerical results obtained from the derived mathematical expressions, the system performances with different parameters are studied, evaluated and compared showing the effects of spatial correlation on the performance of the system. It is observed that spatially correlated antennas can improve the average channel capacity of the cognitive radio system with user scheduling.