NDLI: A dedicated mobile communication system with no base station using frequency hopping spread spectrum multiple access

Content Provider	IEEE Xplore Digital Library
Author	Madhusudhana, R.G.
Copyright Year	1989
Description	Author affiliation: Andhra Univ., Visakhapatnam, India (Madhusudhana, R.G.)
Abstract	The realization of an FH-SSMA (frequency-hopping spread-spectrum multiple-access) communication system useful for 16 mobile subscribers within an area of 5 miles diameter is considered. The subscriber's information is digitized with the help of a CVSD (continuously variable slope detector) codec at the rate of 16 kb/s which is sent through a 4/16 orthogonal encoder giving coded data of rate 64 kb/s. The subscriber's address is chosen by a 4-bit binary code which in turn selects the address signal to be generated. The data are BFSK (binary frequency-shift keying)-modulated in such a way that the data bit and the 4-bit address will together select the frequency of the synthesizer giving out the frequency-coded address signal with modulation. Using noncoherent FH-BFSK techniques at the receiver, FH code acquisition and tracking are obtained. The entire system for 16 mobile subscribers occupies 2.4 MHz bandwidth for two-way communication. The receiver performance is represented by a P/sub e/ (probability of error) of 10/sup -3/.
Starting Page	788
Ending Page	792
File Size	406630
Page Count	5
File Format	PDF
ISSN	10903038
DOI	10.1109/VETEC.1989.40163
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-05-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spread spectrum communication Mobile communication Base stations Frequency synthesizers Codecs Bandwidth Transmitters Interference Switches Binary codes
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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