OPTIMAL POWER TRANSMISSION FOR VARIOUS SPECTRUM SHARING APPROACHES IN OFDM BASED COGNITIVE RADIO NETWORK

Abstract
In context of effective resource utilization using spectrum sensing and dynamic spectrum access (DSA), Cognitive Radio (CR) has been proposed as versatile and an emerging technology. In order to understand, how OFDM is consider as suitable candidate for cognitive radio, this paper presents various aspects of Orthogonal Frequency Division Multiplexing (OFDM) based cognitive radio. As total transmission rate of CR user is maximized in interference constraint scenario, this paper also formulate problem for optimal transmit power control in OFDM based CR under various spectrum sharing approaches such as underlay, overlay and interweave. Apart from existing works in the literature here we presented mathematical formula for power-allocation schemes for interweave as well as joint underlay and overlay approach. MATLAB simulation shows that with optimal power transmission by CR users, capacity can be improved significantly.

Authors
Sandeep Kumar Jain1, Baljeet Kaur2
I.K. Gujral Punjab Technical University, India1, Guru Nanak Dev Engineering College, India2

Keywords
Cognitive Radio, Overlay, Underlay, Interweave, Optimal Power
Published By :
ICTACT
Published In :
ICTACT Journal on Communication Technology
( Volume: 11 , Issue: 3 )
Date of Publication :
September 2020
DOI :

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