Pre-FFT and post-FFT adaptive antenna array for OFDM transmission over cognitive radio network

Wan Mohd Zuferi , Wan Nadzlia Shazwanie and Ramli , Nordin and Mohamad, Hafizal and Abdullah, Khaizuran (2012) Pre-FFT and post-FFT adaptive antenna array for OFDM transmission over cognitive radio network. In: International Conference on Computer and Communication Engineering, ICCCE 2012, 3-5 July 2012, Kuala Lumpur.

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Abstract

This paper presents the joint interference cancellation and equalization for space-time block coded (STBC) orthogonal frequency division multiplexing (STBC-OFDM) transmission over underlay cognitive radio network. In this work, pre- and post-FFT adaptive antenna array is employed at secondary user receiver to find optimum antenna weights that place nulls at the primary transmitters. The paper discusses the performance of using both systems in STBC-OFDM receiver and presents the optimum weight determination for beamformers based on the minimum mean square error (MMSE) criteria. Simulation results demonstrate that post-FFT is optimum in terms of maximizing signal-to-noise-and-interference power ratio (SINR) and provides a lower bit error rate (BER) under existence of several primary users.

Item Type:	Conference or Workshop Item (Full Paper)
Additional Information:	3407/29227 Digital Object Identifier : 10.1109/ICCCE.2012.6271181 Print ISBN: 978-1-4673-0478-8
Uncontrolled Keywords:	Cognitive radio , OFDM , STBC , beamforming , diversity , interference cancellation
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering
Depositing User:	Dr Khaizuran Abdullah
Date Deposited:	11 Mar 2013 11:49
Last Modified:	11 Mar 2013 11:55
URI:	http://irep.iium.edu.my/id/eprint/29227

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