A novel receiver design of nonorthogonal FDM systems in underwater acoustics communication

While orthogonal frequency-division multiplexing (OFDM) has been studied for a decade, the study of nonorthogonal frequency-division multiplexing (NOFDM) in the underwater acoustics (UWA) communication has never been reported, to the best of our knowledge. Therefore, we investigate the NOFDM techniq...

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Main Authors: Anwar, Sheraz, Yuen, Chau, Sun, Haixin, Guan, Yong Liang, Babar, Zeeshan
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/151561
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1515612021-06-21T06:25:50Z A novel receiver design of nonorthogonal FDM systems in underwater acoustics communication Anwar, Sheraz Yuen, Chau Sun, Haixin Guan, Yong Liang Babar, Zeeshan School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Basis Expansion Model Guard Intervals While orthogonal frequency-division multiplexing (OFDM) has been studied for a decade, the study of nonorthogonal frequency-division multiplexing (NOFDM) in the underwater acoustics (UWA) communication has never been reported, to the best of our knowledge. Therefore, we investigate the NOFDM technique for the UWA communication considering the doubly dispersive channel. The main feature of the NOFDM is that it involves more closely packed subcarriers compared to the OFDM, which results in higher spectral efficiency. However, this transmission suffers from severe intercarrier interference. Since, we are considering the doubly dispersive channel, intersymbol interference is also encountered due to the multipath propagation. Therefore, the traditional receiver of the NOFDM system in the UWA channel tends to have high computational complexity. Considering this problem, we design a receiver for the NOFDM system, where the basis expansion model is used along with the compressed sensing channel estimation technique, i.e., orthogonal matching pursuit (OMP), which can effectively reduce the computational complexity. However, while implementing this technique in the real sea environment, the problem of long delay/Doppler spread is encountered due to guard intervals. Therefore, we propose the use of a time-domain equalizer to mitigate the effect of long delay/Doppler spread. Simulation and experimental results based on the bit error rate demonstrate the performance degradation due to severe interference in our proposed receiver. On the contrary, the mean-square-error performance shows that our proposed receiver with the OMP channel estimation outperforms the OFDM receiver. Similarly, higher spectral efficiency gain is attained due to the closely packed subcarriers. Accepted version The work of S. Anwar and H. Sun was supported in part by the National Natural Science Foundation of China under Grant 61671394, in part by the Science and Technology Program of Shenzhen, China, under Grant JSGG20170414090428464, in part by Fundamental Research Funds for the Central Universities under Grant 20720170044, and in part by the National Key R&D program of China under Grant 2018YFC0809200. 2021-06-21T06:25:50Z 2021-06-21T06:25:50Z 2019 Journal Article Anwar, S., Yuen, C., Sun, H., Guan, Y. L. & Babar, Z. (2019). A novel receiver design of nonorthogonal FDM systems in underwater acoustics communication. IEEE Systems Journal, 14(3), 3875-3884. https://dx.doi.org/10.1109/JSYST.2019.2938185 1932-8184 https://hdl.handle.net/10356/151561 10.1109/JSYST.2019.2938185 3 14 3875 3884 en IEEE Systems Journal © 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. The published version is available at: https://doi.org/10.1109/JSYST.2019.2938185. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Basis Expansion Model
Guard Intervals
spellingShingle Engineering::Electrical and electronic engineering
Basis Expansion Model
Guard Intervals
Anwar, Sheraz
Yuen, Chau
Sun, Haixin
Guan, Yong Liang
Babar, Zeeshan
A novel receiver design of nonorthogonal FDM systems in underwater acoustics communication
description While orthogonal frequency-division multiplexing (OFDM) has been studied for a decade, the study of nonorthogonal frequency-division multiplexing (NOFDM) in the underwater acoustics (UWA) communication has never been reported, to the best of our knowledge. Therefore, we investigate the NOFDM technique for the UWA communication considering the doubly dispersive channel. The main feature of the NOFDM is that it involves more closely packed subcarriers compared to the OFDM, which results in higher spectral efficiency. However, this transmission suffers from severe intercarrier interference. Since, we are considering the doubly dispersive channel, intersymbol interference is also encountered due to the multipath propagation. Therefore, the traditional receiver of the NOFDM system in the UWA channel tends to have high computational complexity. Considering this problem, we design a receiver for the NOFDM system, where the basis expansion model is used along with the compressed sensing channel estimation technique, i.e., orthogonal matching pursuit (OMP), which can effectively reduce the computational complexity. However, while implementing this technique in the real sea environment, the problem of long delay/Doppler spread is encountered due to guard intervals. Therefore, we propose the use of a time-domain equalizer to mitigate the effect of long delay/Doppler spread. Simulation and experimental results based on the bit error rate demonstrate the performance degradation due to severe interference in our proposed receiver. On the contrary, the mean-square-error performance shows that our proposed receiver with the OMP channel estimation outperforms the OFDM receiver. Similarly, higher spectral efficiency gain is attained due to the closely packed subcarriers.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Anwar, Sheraz
Yuen, Chau
Sun, Haixin
Guan, Yong Liang
Babar, Zeeshan
format Article
author Anwar, Sheraz
Yuen, Chau
Sun, Haixin
Guan, Yong Liang
Babar, Zeeshan
author_sort Anwar, Sheraz
title A novel receiver design of nonorthogonal FDM systems in underwater acoustics communication
title_short A novel receiver design of nonorthogonal FDM systems in underwater acoustics communication
title_full A novel receiver design of nonorthogonal FDM systems in underwater acoustics communication
title_fullStr A novel receiver design of nonorthogonal FDM systems in underwater acoustics communication
title_full_unstemmed A novel receiver design of nonorthogonal FDM systems in underwater acoustics communication
title_sort novel receiver design of nonorthogonal fdm systems in underwater acoustics communication
publishDate 2021
url https://hdl.handle.net/10356/151561
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