NDLI: Innovative coding scheme for spread-spectrum communications

Content Provider	IEEE Xplore Digital Library
Author	Sorokine, V. Kschischang, F.R. Pasupathy, S.
Copyright Year	1998
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada (Sorokine, V.)
Abstract	It is known that spread-spectrum (SS) communications in general, and code-division multiple access (CDMA) in particular, gain certain advantages in performance, if powerful low-rate error-correcting codes are used for error-protection in such systems. We propose an innovative coding scheme for SS systems based on Gallager (low-density parity-check) codes that can be iteratively decoded with relatively low complexity. Consequently, this scheme is readily implementable in both base station and subscriber side receivers. We focus our attention on Gallager codes with parameters compatible with the IS-95 cellular radio standard. We discuss soft- and hardware implementations of iterative decoding for Gallager codes. We estimate that by using Gallager codes, a factor of five improvement in CDMA cell capacity relative to the uncoded system can be achieved, equivalent to a factor of two improvement relative to the state-of-the art orthogonal convolutional codes.
Starting Page	1491
Ending Page	1495
File Size	510874
Page Count	5
File Format	PDF
ISBN	0780348729
DOI	10.1109/PIMRC.1998.731445
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-09-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spread spectrum communication Multiaccess communication Iterative decoding Performance gain Error correction codes Parity check codes Base stations Receivers Land mobile radio cellular systems Code standards
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
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
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
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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