NDLI: A semi-blind EMVA for maximum likelihood equalization of GMSK signal in ISI fading channels

Content Provider	IEEE Xplore Digital Library
Author	Nguyen, H. Levy, B.C.
Copyright Year	2002
Description	Author affiliation: Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA (Nguyen, H.; Levy, B.C.)
Abstract	We examine the maximum likelihood (ML) equalization of Gaussian minimum shift keyed (GMSK) signals in GSM systems. The method we employ is based on the expectation maximization Viterbi algorithm. (EMVA). The EMVA is applicable to transmission schemes that can be modeled as a finite state machine (FSM), whose noisy output sequence is thus a hidden Markov chain. The GMSK signal transmitted via an inter-symbol interference (ISI) channel is just one particular instance of a hidden Markov model. Our channel identification procedure makes full use of the known training bits available in each GSM frame and thereby results in a semi-blind EMVA (SbEMVA). For a static ISI channel, simulation results indicate that the SbEMVA is near-optimal in error performance. For a Ricean fading ISI channel with a spread factor of 0.01, a K-factor of 5, and at a BER of 10/sup -3/, we find that the SbEMVA is about 4.dB better titan the ML receiver that uses the channel estimate obtained from just the training data.
Starting Page	1905
Ending Page	1908
File Size	274667
Page Count	4
File Format	PDF
ISBN	0780375769
ISSN	10586393
DOI	10.1109/ACSSC.2002.1197111
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-11-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Intersymbol interference Fading Training data Blind equalizers GSM Hidden Markov models Maximum likelihood estimation Time division multiple access Viterbi algorithm Automata
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications

Sl.	Authority	Responsibilities	Communication Details
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
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@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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