NDLI: Performance study of a reduced complexity time synchronization approach for OFDM systems

Content Provider	IEEE Xplore Digital Library
Author	Nasraoui, L. Atallah, L.N. Siala, M.
Copyright Year	2012
Description	Author affiliation: Higher School of Communications, University of Carthage, Tunisia (Nasraoui, L.; Atallah, L.N.; Siala, M.)
Abstract	This paper presents a performance analysis of a recently proposed preamble based reduced complexity two-stage synchronization technique. The preamble, composed of two identical sub-sequences, is first used to determine an uncertainty interval based on Cox and Schmidl algorithm. Then, a differential correlation is carried using a new sub-sequence obtained by element wise multiplication of the preamble sub-sequence and a shifted version of it. This second step is exploited to fine tune the coarse estimate by carrying the differential correlation over the uncertainty interval. We here study the effect of the training sequence choice on the synchronization performance in the general case of multipath channels. We also discuss some complexity issues compared to previously proposed algorithms. We show that the frame start detection is greatly sensitive to the training sequence class and choice. Computational load evaluation ensure that the reduced complexity approach, which was found to provide almost equal performance to those obtained by higher complexity algorithms in [10, 11], has much lower complexity load comparable to that of simple sliding correlation based approaches. To further reduce the computational load, an optimal choice of the uncertainty interval, used in the fine stage, can also be adapted to the operating SNR.
Starting Page	1
Ending Page	5
File Size	285287
Page Count	5
File Format	PDF
ISBN	9781467310079
e-ISBN	9781467310086
e-ISBN	9781467310062
DOI	10.1109/ComNet.2012.6217742
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-03-29
Publisher Place	Tunisia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gold Correlation M-sequences OFDM Gold sequences Estimation Complexity theory Preamble Synchronization Sliding correlation Differential correlation
Content Type	Text
Resource Type	Article

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
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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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