NDLI: Gibbs-Sampler-Based Semiblind Equalizer in Underwater Acoustic Communications

Content Provider	IEEE Xplore Digital Library
Author	Jun Ling Jian Li
Copyright Year	1976
Abstract	The acoustic communication channel is frequency selective with long memory, leading to severe intersymbol interference (ISI). To mitigate ISI, equalizer becomes an indispensable module in the receiver structure. However, the time-varying nature of the underwater acoustic environment imposes unique challenges to the design of an effective equalizer. First, the equalization process needs to be performed on a block basis and the block length could be short. Second, concerning that the dynamic acoustic medium makes the newly acquired channel information readily outdated, it is desirable that the equalizer performance is robust against the inaccuracy of the channel information when the transmission scheme involves cross-block reference. In this paper, we consider a statistical semiblind equalizer implemented by the Gibbs sampler techniques. The proposed equalizer con- ducts channel estimation and symbol detection in a joint manner, and it is robust to the accuracy of the channel information. The effectiveness of the proposed semiblind equalizer is demonstrated using both simulated and the 2008 Surface Processes and Communications Experiment (SPACE08, Martha's Vineyard, MA) in-water experimentation examples.
Sponsorship	IEEE Oceanic Engineering Society
Starting Page	1
Ending Page	13
Page Count	13
File Size	3245534
File Format	PDF
ISSN	03649059
Volume Number	37
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Equalizers Channel estimation Payloads Vectors Training Underwater acoustics OFDM underwater acoustic communications Gibbs-sampler-based semiblind equalizer symbol detection two-step equalizer
Content Type	Text
Resource Type	Article
Subject	Ocean Engineering Mechanical Engineering Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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