NDLI: Universal digital portable radio communications

Content Provider	IEEE Xplore Digital Library
Author	Cox, D.C.
Copyright Year	1963
Abstract	Providing voice and data communications to people away from their wireline telephones has become a major communication frontier. This frontier is being penetrated by evolving approaches to portable communications, e.g., cordless telephones, mobile radiotelephone, and radio paging. However, these approaches have many limitations; none can provide universal portable communications services. This paper discusses limitations of the evolving approaches and considers objectives and approaches for providing more universal digital portable communications as an integrated part of telephone exchange networks. These more universal communications could be accomplished by using demand-assigned radio links for the last thousand feet or so of telephone loops and sharing the remainder of the fixed distribution facilities. Fixed radio ports as integrated parts of telephone distribution networks could be placed throughout service regions. Efficient use of the radio spectrum could be insured by the planned reuse of radio frequencies throughout the regions. The severe multipath radio propagation environment within and around buildings that strongly influences the design of portable communications systems is described in the paper. System configurations and radio link techniques, that can provide reliable communications in the multipath environment, are discussed. Radio system calculations are illustrated for radio ports with 30-ft-high antennas in residential areas. The calculations indicate that radio link availability would be greater than 99 percent for 2000-ft port separations and 5-mW portable transmitters. Reuse of frequencies would require dividing the allocated frequency band into segments for use at adjacent ports. Calculations suggest that link availability in the cochannel interference environment would be greater than 99 percent, if 25 to 35 segments were used in residential areas.
Sponsorship	IEEE Publication
Starting Page	436
Ending Page	477
Page Count	42
File Size	4797686
File Format	PDF
ISSN	00189219
Volume Number	75
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1987-04-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio communication Telephony Mobile communication Radio link Radio spectrum management Frequency conversion Data communication Radio frequency Radio propagation Buildings
Content Type	Text
Resource Type	Article
Subject	Computer Science Electrical and Electronic Engineering

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

Universal portable radio communications

Universal Digital Portable Communications: A System Perspective

The indoor radio propagation channel

Multipath time delay spread in the digital portable radio environment

Intra-Operator Inter-Mode Spectrum Sharing

The radio propagation enviroment for universal digital portable communications

Low-power radio-frequency ICs for portable communications

Portable digital radio communications-an approach to tetherless access

Influence of Environmental Buildings on UHF Land Mobile Radio Propagation

Universal digital portable radio communications

Similar Documents

Universal portable radio communications

Universal Digital Portable Communications: A System Perspective

The indoor radio propagation channel

Multipath time delay spread in the digital portable radio environment

Intra-Operator Inter-Mode Spectrum Sharing

The radio propagation enviroment for universal digital portable communications

Low-power radio-frequency ICs for portable communications

Portable digital radio communications-an approach to tetherless access

Influence of Environmental Buildings on UHF Land Mobile Radio Propagation

Universal digital portable radio communications