NDLI: Analysis on the One-Way Communication Capability of GPS Satellites in Orbit Transmitting Non-navigational Information

Content Provider	IEEE Xplore Digital Library
Author	Cheng Xi-jun Xu Jiang-ning Cao Ke-jin Zhu Ying-bin
Copyright Year	2009
Abstract	The GPS system is capable of the one-way communication (OWC) transmitting non-navigational information if the reserved bits of L1C Nav message and the newly-added CNav message types for L2C signal are utilized. Excluding the potential communication protocol overheads, a single frequency with one satellite transmits data at 0.5B/s; with the dual frequency transmission by using L1C and L2C frequencies and the parallel transmission of multiple satellites, the transmission rate can be increased to approximately 4B/s. The one-way communication of GPS is covert due to the covertness of communication channels, the occasionality of one-way communication, the disorderly distribution of information and the difficulty in recognizing and understanding communication data when the communication protocol is unknown. This paper discusses the problems of satellite rise-and-fall, data packetization and data dropout and gives solutions for them. A design paradigm for the format of newly-added L2C CNav message types is given. The GPS one-way communication has the advantages of global coverage, day-and-night and all-weather operation, as well as low cost, thus it can meet the needs for special purposes, such as civilian emergency broadcast communication, military submarine command system and command of intelligence collection.
Starting Page	24
Ending Page	29
File Size	427119
Page Count	6
File Format	PDF
ISBN	9780769538921
DOI	10.1109/ICCTD.2009.135
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-11-13
Publisher Place	Malaysia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Military communication Protocols Costs Satellite broadcasting Submarine communication GPS One-way communication (OWC) Underwater vehicles Information analysis Global Positioning System Covert communication Artificial satellites Emergency communication Communication channels Frequency Reserved Bits Navigation Message
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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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
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