TY - GEN
T1 - Robust timing synchronization for AC-OFDM based optical wireless communications
AU - Ranjha, Bilal A.
AU - Kashani, Mohammadreza A.
AU - Kavehrad, Mohsen
AU - Deng, Peng
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/6/10
Y1 - 2015/6/10
N2 - Visible light communications (VLC) have recently attracted a growing interest and can be a potential solution to realize indoor wireless communication with high bandwidth capacity for RF-restricted environments such as airplanes and hospitals. Optical based orthogonal frequency division multiplexing (OFDM) systems have been proposed in the literature to combat multipath distortion and intersymbol interference (ISI) caused by multipath signal propagation. In this paper, we present a robust timing synchronization scheme suitable for asymmetrically clipped (AC) OFDM based optical intensity modulated direct detection (IM/DD) wireless systems. Our proposed method works perfectly for ACO-OFDM, Pulse amplitude modulated discrete multitone (PAM-DMT) and discrete Hartley transform (DHT) based optical OFDM systems. In contrast to existing OFDM timing synchronization methods which are either not suitable for AC OFDM techniques due to unipolar nature of output signal or perform poorly, our proposed method is suitable for AC OFDM schemes and outperforms all other available techniques. Both numerical and experimental results confirm the accuracy of the proposed method. Our technique is also computationally efficient as it requires very few computations as compared to conventional methods in order to achieve good accuracy.
AB - Visible light communications (VLC) have recently attracted a growing interest and can be a potential solution to realize indoor wireless communication with high bandwidth capacity for RF-restricted environments such as airplanes and hospitals. Optical based orthogonal frequency division multiplexing (OFDM) systems have been proposed in the literature to combat multipath distortion and intersymbol interference (ISI) caused by multipath signal propagation. In this paper, we present a robust timing synchronization scheme suitable for asymmetrically clipped (AC) OFDM based optical intensity modulated direct detection (IM/DD) wireless systems. Our proposed method works perfectly for ACO-OFDM, Pulse amplitude modulated discrete multitone (PAM-DMT) and discrete Hartley transform (DHT) based optical OFDM systems. In contrast to existing OFDM timing synchronization methods which are either not suitable for AC OFDM techniques due to unipolar nature of output signal or perform poorly, our proposed method is suitable for AC OFDM schemes and outperforms all other available techniques. Both numerical and experimental results confirm the accuracy of the proposed method. Our technique is also computationally efficient as it requires very few computations as compared to conventional methods in order to achieve good accuracy.
UR - http://www.scopus.com/inward/record.url?scp=84938804960&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84938804960&partnerID=8YFLogxK
U2 - 10.1109/ICNSURV.2015.7121217
DO - 10.1109/ICNSURV.2015.7121217
M3 - Conference contribution
AN - SCOPUS:84938804960
T3 - ICNS 2015 - Innovation in Operations, Implementation Benefits and Integration of the CNS Infrastructure, Conference Proceedings
SP - B41-B410
BT - ICNS 2015 - Innovation in Operations, Implementation Benefits and Integration of the CNS Infrastructure, Conference Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2015 15th Annual Integrated Communication, Navigation and Surveillance Conference, ICNS 2015
Y2 - 21 April 2015 through 23 April 2015
ER -