NDLI: Extending talk time through improved transmitter efficiency

Content Provider	IEEE Xplore Digital Library
Author	Bateman, A.
Copyright Year	1999
Description	Author affiliation: Wireless Syst. Int. Ltd., Bristol, UK (Bateman, A.)
Abstract	Take any cellular or SMR handset and the standby time will exceed the talk time by at least a factor of 10. More specifically, the power consumed by the transmit circuitry during a call will typically be three to four times that used in receive. Dominating the transmit power consumption is the RF amplifier ("PA"), a component whose efficiency today is at best 55% (i.e. approx. half the PA battery drain is wasted as heat) and more typically only 30% to 40% for CDMA and TDMA handsets. Techniques for improving PA efficiency will therefore have the single greatest impact on improving talk time in all handset designs. This paper describes the front line candidates for increasing amplifier efficiency, (in some cases beyond 70%), and provides measurement and simulation data from test units.
Starting Page	727
Ending Page	731
File Size	399473
Page Count	5
File Format	PDF
ISBN	0780356683
ISSN	15253511
DOI	10.1109/WCNC.1999.796742
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-09-21
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transmitters Telephone sets Circuits Energy consumption Radiofrequency amplifiers Batteries Waste heat Multiaccess communication Time division multiple access Testing
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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