Performance Analysis of Scheduled TAS Cognitive Radio System with Generalized Selection Combining
Pages 1567 - 1582
Abstract
In this paper, a multiuser multiple-input-multiple-output, cognitive radio (CR) system has been analysed with transmit antenna selection (TAS) at CR base station transmitter and generalized selection combining GSC (Nr, Nc) at each CR user. Multiuser diversity gain is obtained by selecting best CR user on the basis of instantaneous post processed signal-to-noise ratio (SNR) at the CR-Rx. The improved average post processed SNR and ergodic capacity of proposed TAS/GSC system is a function of best chosen receiver branches. The proposed TAS/GSC system is constrained by interference temperature limit `Q' at primary user (PU) Rx, which degrades overall throughput hence peak power (Pp) of CR base station is set to be less than `Q'. We also derive analytic expressions for ergodic capacity and average post processed SNR. The simulation result validates with analytical result.
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Kluwer Academic Publishers
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Published: 01 July 2017
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