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Non-coherent detection for ultraviolet communications with inter-symbol interference

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Hu, Wenxiu, Wei, Zhuangkun, Popov, Sergei, Leeson, Mark S., Zhang, Min and Xu, Tianhua (2020) Non-coherent detection for ultraviolet communications with inter-symbol interference. Journal of Lightwave Technology, 38 (17). pp. 4699-4707. doi:10.1109/JLT.2020.2993537 ISSN 0733-8724.

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Official URL: http://dx.doi.org/10.1109/JLT.2020.2993537

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Abstract

Ultraviolet communication (UVC) serves as a promising supplement to share the responsibility for the overloads in conventional wireless communication systems. One challenge for UVC lies in inter-symbol-interference (ISI), which combined with the ambient noise, contaminates the received signals and thereby deteriorates the communication accuracy. Existing coherent signal detection schemes (e.g. maximum likelihood sequence detection, MLSD) require channel state information (CSI) to compensate the channel ISI effect, thereby falling into either a long overhead and large computational complexity, or poor CSI acquisition that further hinders the detection performance. Non-coherent schemes for UVC, although capable of reducing the complexity, cannot provide high detection accuracy in the face of ISI. In this work, we propose a novel non-coherent paradigm via the exploration of the UV signal features that are insensitive to the ISI. By optimally weighting and combining the extracted features to minimize the bit error rate (BER), the optimally-weighted non-coherent detection (OWNCD) is proposed, which converts the signal detection with ISI into a binary detection framework with a heuristic decision threshold. As such, the proposed OWNCD avoids the complex CSI estimation and guarantees the detection accuracy. Compared to the state-of-the-art MLSD in the cases of static and time-varying CSI, the proposed OWNCD can gain ∼1 dB and 8 dB in signal-to-noise-ratio (SNR) at the 7% overhead FEC limit (BER of 4.5×10 −3 , respectively, and can also reduce the computational complexity by 4 order of magnitude

Item Type: Journal Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Engineering > Engineering
Library of Congress Subject Headings (LCSH): Wireless communication systems, Optical communications, Laser beams -- Scattering, Signal detection
Journal or Publication Title: Journal of Lightwave Technology
Publisher: IEEE
ISSN: 0733-8724
Official Date: 1 September 2020
Dates:
DateEvent
1 September 2020Published
11 May 2020Available
6 May 2020Accepted
Volume: 38
Number: 17
Page Range: pp. 4699-4707
DOI: 10.1109/JLT.2020.2993537
Status: Peer Reviewed
Publication Status: Published
Reuse Statement (publisher, data, author rights): © 2020 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.
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 21 May 2020
Date of first compliant Open Access: 21 May 2020
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/R035342/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
778305Horizon 2020 Framework Programmehttp://dx.doi.org/10.13039/100010661
61975020[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809

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