NDLI: GPSEM: A SDR-based LEO satellite in-orbit GPS intermediate frequency emulator

Content Provider	IEEE Xplore Digital Library
Author	Wan YunHeng Chen Xi Zhang Zhonghua
Copyright Year	2011
Description	Author affiliation: Space Center, Tsinghua University, Beijing, China 100084 (Wan YunHeng; Chen Xi; Zhang Zhonghua)
Abstract	To develop a high performance Low Earth Orbit (LEO) satellite GPS receiver, a flexible and low-cost effective in-orbit GPS emulator is a prerequisite. Catering to this need, a software defined radio based LEO satellite in-orbit GPS Intermediate Frequency (IF) emulator, named GPSEM, was proposed. The GPSEM features a computer software and a USB extension hardware system. The GPSEM computer software can generate precisely combined IF signal samples of all GPS visible space vehicles at the GPS user device. The USB extension hardware system of the GPSEM is based on the most recent Nandflash mass storage technology, which can store and playback the GPS IF samples for more than one LEO orbit cycle time. A key to GPSEM is to calculate GPS space vehicles' signal transmission time with a given user position and receiver time. Toward this problem, a iterative solution based on Taylor expansion was presented. A test system was built in which the output of the IF emulator is feed into an engineering THU-1 satellite GPS receiver. The positioning results showed that the proposed IF emulator performs well, which made it an effective tool for the development of the next generation LEO satellite GPS receiver.
Starting Page	407
Ending Page	410
File Size	1265489
Page Count	4
File Format	PDF
ISBN	9781457715860
e-ISBN	9781457715877
DOI	10.1109/ICCSNT.2011.6181986
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-12-24
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computers SDR Satellites Receivers LEO Universal Serial Bus Software Emulator GPS Arrays Indexes
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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