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Fine Timing Synchronization Based on Modified Expectation Maximization Clustering Algorithm for OFDM Systems

Zhang, Xiaoying, Zhang, Lei, Xiao, Pei and Wei, Jibo (2019) Fine Timing Synchronization Based on Modified Expectation Maximization Clustering Algorithm for OFDM Systems IEEE Wireless Communications Letters.

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Abstract

A novel fine timing synchronizaton method based on the modified expectation-maximization (EM) clustering algorithm is proposed for OFDM systems. Using the cross-correlation metrics of one preamble symbol, the cross-correlation peaks corresponding to the channel arriving paths are identified by the proposed modified EM clustering algorithm, the position of the first coherent cross-correlation peak is then chosen as the start of the frame. Computer simulations show that the proposed method is robust in multipath dispersive channels and achieves superior performance to existing techniques in terms of timing accuracy.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Zhang, Xiaoying
Zhang, Leilz0004@surrey.ac.uk
Xiao, PeiP.Xiao@surrey.ac.uk
Wei, Jibo
Date : 10 June 2019
DOI : 10.1109/LWC.2019.2921957
Copyright Disclaimer : © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords : Orthogonal frequency-division multiplexing (OFDM); Synchronization; Timing offset; Expectation maximization; Synchronization; Clustering algorithms; OFDM; Wireless communication; Estimation
Depositing User : Clive Harris
Date Deposited : 14 Jun 2019 07:39
Last Modified : 14 Jun 2019 07:39
URI: http://epubs.surrey.ac.uk/id/eprint/851994

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