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

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Tian, Shuang, Panta, Kusha, Suraweera, Himal, Schmidt, Brendon, 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

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.

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Item type Article
URI https://vuir.vu.edu.au/id/eprint/3953
DOI https://doi.org/10.1109/T-WC.2008.070678
Official URL http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumb...
Subjects Historical > Faculty/School/Research Centre/Department > Centre for Telecommunications and Micro-Electronics (CTME)
Current > FOR Classification > 0906 Electrical and Electronic Engineering
Historical > SEO Classification > 970110 Expanding Knowledge in Technology
Keywords ResPubID16019, optical wireless communications, orthogonal frequency division multiplexing (OFDM), timing synchronization, timing metric, asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM)
Citations in Scopus 29 - View on Scopus
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