MDPSK-based nonequalization OFDM for coherent free-space optical communication

In this letter, we apply a non-equalization orthogonal frequency-division multiplexing (NE-OFDM) technique in optical turbulence channel for coherent free-space optical (FSO) systems, utilizing multilevel differential phase-shift-keying (MDPSK). We adopt the modified Rician distribution as the optic...

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Main Authors: Chen, Chen, Zhong, Wen-De, Li, Xiang, Wu, Dehao
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2014
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Online Access:https://hdl.handle.net/10356/103454
http://hdl.handle.net/10220/24501
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1034542020-03-07T14:00:36Z MDPSK-based nonequalization OFDM for coherent free-space optical communication Chen, Chen Zhong, Wen-De Li, Xiang Wu, Dehao School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics In this letter, we apply a non-equalization orthogonal frequency-division multiplexing (NE-OFDM) technique in optical turbulence channel for coherent free-space optical (FSO) systems, utilizing multilevel differential phase-shift-keying (MDPSK). We adopt the modified Rician distribution as the optical turbulence channel for coherent FSO systems, where both amplitude fading and phase distortion are taken into consideration. The differential encoding process of MDPSK based NE-OFDM can be performed either in the frequency domain (FD) or in the time domain (TD). Our simulation results show that NE-OFDM using FD-MDPSK achieves nearly the same bit-error-rate (BER) performance as that using TD-MDPSK, but with a relatively lower hardware complexity and a higher spectral efficiency. It is also revealed that FD-MDPSK based NE-OFDM attains a comparable BER performance to the conventional OFDM with pilot tones or training sequences assisted channel estimation and equalization. Hence, FD-MDPSK based NE-OFDM is promising for coherent FSO communication. Accepted version 2014-12-22T02:06:33Z 2019-12-06T21:13:03Z 2014-12-22T02:06:33Z 2019-12-06T21:13:03Z 2014 2014 Journal Article Chen, C., Zhong, W.-D., Li, X., & Wu, D. (2014). MDPSK-based nonequalization OFDM for coherent free-space optical communication. IEEE photonics technology letters, 26(16), 1617-1620. https://hdl.handle.net/10356/103454 http://hdl.handle.net/10220/24501 10.1109/LPT.2014.2329133 en IEEE photonics technology letters © 2014 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. The published version is available at: [Article DOI: http://dx.doi.org/10.1109/LPT.2014.2329133]. 4 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
spellingShingle DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Chen, Chen
Zhong, Wen-De
Li, Xiang
Wu, Dehao
MDPSK-based nonequalization OFDM for coherent free-space optical communication
description In this letter, we apply a non-equalization orthogonal frequency-division multiplexing (NE-OFDM) technique in optical turbulence channel for coherent free-space optical (FSO) systems, utilizing multilevel differential phase-shift-keying (MDPSK). We adopt the modified Rician distribution as the optical turbulence channel for coherent FSO systems, where both amplitude fading and phase distortion are taken into consideration. The differential encoding process of MDPSK based NE-OFDM can be performed either in the frequency domain (FD) or in the time domain (TD). Our simulation results show that NE-OFDM using FD-MDPSK achieves nearly the same bit-error-rate (BER) performance as that using TD-MDPSK, but with a relatively lower hardware complexity and a higher spectral efficiency. It is also revealed that FD-MDPSK based NE-OFDM attains a comparable BER performance to the conventional OFDM with pilot tones or training sequences assisted channel estimation and equalization. Hence, FD-MDPSK based NE-OFDM is promising for coherent FSO communication.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Chen, Chen
Zhong, Wen-De
Li, Xiang
Wu, Dehao
format Article
author Chen, Chen
Zhong, Wen-De
Li, Xiang
Wu, Dehao
author_sort Chen, Chen
title MDPSK-based nonequalization OFDM for coherent free-space optical communication
title_short MDPSK-based nonequalization OFDM for coherent free-space optical communication
title_full MDPSK-based nonequalization OFDM for coherent free-space optical communication
title_fullStr MDPSK-based nonequalization OFDM for coherent free-space optical communication
title_full_unstemmed MDPSK-based nonequalization OFDM for coherent free-space optical communication
title_sort mdpsk-based nonequalization ofdm for coherent free-space optical communication
publishDate 2014
url https://hdl.handle.net/10356/103454
http://hdl.handle.net/10220/24501
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