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A new method to combat with frequency offsets in wireless OFDM systems

A new method to combat with frequency offsets in wireless OFDM systems

Arshad, Kamran and Sheikh, Asrar U.H. (2004) A new method to combat with frequency offsets in wireless OFDM systems. In: 2004 IEEE Region 10 Conference. TENCON 2004. Institute of Electrical and Electronics Engineers Inc., Piscataway, NJ, USA, pp. 593-596. ISBN 0780385608 (doi:10.1109/TENCON.2004.1414665)

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Abstract

Orthogonal frequency division multiplexing (OFDM) is a powerful technique employed in communication systems suffering from frequency selectivity of channel. Coherent demodulation requires channel estimation, which improves performance though with increased complexity of receiver structures. Channel estimation for Wireless OFDM systems require transmission of pilot symbols. For a desired BER, number of pilot symbols mainly depends on Doppler frequency of channel. In this paper, we propose a new scheme of pilot symbol insertion and compare it with existing pilot patterns. OFDM Systems are highly sensitive to frequency offsets and one main source of such offsets is channel phase. In this paper, we also propose an adaptive scheme for channel phase compensation.

Item Type: Conference Proceedings
Title of Proceedings: 2004 IEEE Region 10 Conference. TENCON 2004.
Additional Information: [1] This paper was first presented at the 2004 IEEE Region 10 Conference (TENCON 2004) held from 21-24 November 2004 in Chiang Mai, Thailand.
Uncontrolled Keywords: OFDM modulation, adaptive modulation, demodulation, error statistics, radio receivers, BER, Doppler frequency offset, adaptive scheme, channel phase compensation, coherent demodulation, frequency selectivity, orthogonal frequency division multiplexing, pilot symbol inversion, receiver structure, wireless OFDM system, bit error rate, channel estimation, demodulation, frequency estimation, least squares approximation, minerals, OFDM, petroleum, training data, wireless sensor networks
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Pre-2014 Departments: School of Engineering
School of Engineering > Mobile & Wireless Communications Research Laboratory
Related URLs:
Last Modified: 14 Oct 2016 09:27
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/11279

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