NDLI: Frequency Coordination Between UMTS and GSM Systems at 900 MHZ

Content Provider	IEEE Xplore Digital Library
Author	Vanghi, V. Saglam, M. Jiang Jindi
Copyright Year	2007
Description	Author affiliation: Qualcomm Inc., San Diego (Vanghi, V.; Saglam, M.)
Abstract	UTRA-FDD requirements for operation in the 900 MHz band have been recently standardized in 3 GPP paving the way for refarming of GSM spectrum to UMTS. UMTS900 networks will have to co-exist with GSM900 networks for some time. 3GPP (2005) has studied co-existence issues and has concluded that GSM900 and UMTS900 can co-exist in both coordinated and un-coordinated deployments in which the UMTS900 carrier is allocated 5 MHz in addition to a guard-band equal to 1 GSM channel (200 KHz) on each side. However, in some deployments the operator may not have sufficient available GSM spectrum to allow the GSM traffic to be offloaded from the spectrum allocated to UMTS900 to the remaining GSM spectrum. Hence of interest is to assess system performance under much more stringent spectrum clearing assumptions. Here we characterize transmitter and receiver performance based on lab tests conducted on commercial equipment, both UMTS900 and GSM900 terminals and base stations. From such measurements we assess the impact of mutual interference, GSM MS with UMTS NodeB and UMTS UE with GSM BTS, on receiver performance as a function of frequency offset and coupling loss between interfering transmitter and offended receiver. We show that the limiting factor is the interference caused by the GSM MS to the UMTS Node B, and that as little as 4.2 MHz of GSM spectrum can be cleared and allocated to one UMTS carrier with satisfactory system performance.
Starting Page	1
Ending Page	5
File Size	258173
Page Count	5
File Format	PDF
ISBN	9781424411436
DOI	10.1109/PIMRC.2007.4394049
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-03
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	3G mobile communication GSM System performance Transmitters Interference Testing Base stations Frequency measurement Loss measurement Performance loss
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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