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A Novel Timing Synchronization Method for ACO-OFDM-based Optical Wireless Communications

Tian, Shuang and Panta, Kusha and Suraweera, Himal and Schmidt, Brendon and McLaughlin, Stephen and Armstrong, Jean (2008) A Novel Timing Synchronization Method for ACO-OFDM-based Optical Wireless Communications. IEEE Transactions on Wireless Communications, 7 (12). pp. 4958-4967. ISSN 1536-1276

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Abstract

In this paper, new timing synchronization methods for optical wireless systems using asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) are described. It is well known that OFDM systems are sensitive to timing synchronization errors. Existing synchronization methods cannot be used directly or do not perform well in ACO-OFDM systems because ACO-OFDM signals are unipolar. Therefore, new synchronization methods using a novel training symbol designed for the characteristics of ACO-OFDM are presented. The sensitivity of the new methods to the phase of the receiver sampling clock is considered and it is shown that if only the lower frequency subcarriers in the training symbol are non zero, the sensitivity can be reduced. Analysis and simulation results show that the new timing synchronization methods are effective in ACO-OFDM systems.

Item Type: Article
Uncontrolled Keywords: ResPubID16019, optical wireless communications, orthogonal frequency division multiplexing (OFDM), timing synchronization, timing metric, asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM)
Subjects: Faculty/School/Research Centre/Department > Centre for Telecommunications and Micro-Electronics (CTME)
FOR Classification > 0906 Electrical and Electronic Engineering
SEO Classification > 970110 Expanding Knowledge in Technology
Depositing User: VUIR
Date Deposited: 16 Sep 2011 05:17
Last Modified: 14 Jan 2015 21:52
URI: http://vuir.vu.edu.au/id/eprint/3953
DOI: 10.1109/T-WC.2008.070678
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Citations in Scopus: 11 - View on Scopus

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