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Delay-spread estimation using cyclic-prefix in wireless OFDM systems

Athaudage, Chandranath R. N. & Jayalath, Dhammika (2003) Delay-spread estimation using cyclic-prefix in wireless OFDM systems. In IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003 (ICASSP '03)., 6-10 April 2003, Melbourne.

Abstract

A novel cyclic-prefix based delay-spread estimation technique for wireless OFDM systems is proposed. The technique uses change of gradient of a correlation function as the strategy to detect delayed arrival paths. Estimation of the symbol timing and frequency synchronization information is also inherent in the technique. The proposed technique can be computationally efficiently implemented using the Viterbi search algorithm. Numerical results demonstrate the accuracy of the technique in estimating the relative timing (delay) and magnitude (power) of delayed paths in a multipath environment. The delay-spread information provided by the proposed technique can be adaptively used to improve the accuracy of the frequency domain channel response interpolation process in OFDM systems.

Impact and interest:

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ID Code: 13783
Item Type: Conference Paper
Additional URLs:
Keywords: OFDM, Delay Spread Estimation
ISBN: 0780376633
ISSN: 1520-6149
Subjects: Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000) > COMMUNICATIONS TECHNOLOGIES (100500) > Communications Technologies not elsewhere classified (100599)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2003 IEEE
Copyright Statement: Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Deposited On: 16 Jun 2008
Last Modified: 10 Aug 2011 23:05

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