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Performance evaluation of uncoordinated beamforming over cognitive radio network

Wan Mohd Zuferi , Wan Nadzlia Shazwanie and Ramli, Nordin and Mohamad, Hafizal and Abdullah, Khaizuran (2012) Performance evaluation of uncoordinated beamforming over cognitive radio network. In: 2012 International Symposium on Telecommunication Technologies (ISTT 2012), 26th-28th Nov. 2012, Kuala Lumpur.

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Abstract

This paper presents the two strategies of jointlyoptimized uncoordinated beamforming algorithms for cognitive radio networks. Here, we evaluate the performance of signal-tointerference-plus-noise ratio (SINR) and achievable sum rate of the system when both primary and secondary users transmit concurrently over the same spectrum. We present the optimum weight design to maximize the SINR and achievable sum rate for both primary and cognitive link under the condition that the cross interference at both receivers are totally nullified. The interference cancellation is done at the secondary user and no coordination between the primary and secondary users is required as we employed uncoordinated beamforming in the networks. The fairness of the SINR performance in primary and cognitive link when the primary user employing maximal ratio combining beamformer while the secondary user employing discrete search and gradient algorithm is discussed using different number of transmit and receive antennas. Simulation results demonstrate that employing gradient algorithm at the cognitive link is optimum in terms of maximizing SINR and provides a higher rate compared to the discrete search.

Item Type: Conference or Workshop Item (Invited Papers)
Additional Information: 3407/49501 (ISBN: 978-1-4673-4784-6, DOI: 10.1109/ISTT.2012.6481585)
Uncontrolled Keywords: Cognitive radio, interference cancellation, beamforming, MIMO
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication. Including telegraphy, radio, radar, television
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User: Dr Khaizuran Abdullah
Date Deposited: 16 May 2016 10:47
Last Modified: 16 May 2016 10:47
URI: http://irep.iium.edu.my/id/eprint/49501

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