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Multi-mode modem/codec designsThe design of an integrated modem/codec unit which can receive coded and uncoded BPSK an QPSK using de facto standard coding schemes as well as 8PSK-TCM and 16PSK-TCM is examined. The design is totally compatible with today's modulation schemes and capable of processing tomorrow's TCM codes. This is accomplished in the modem by using quadrature channel carrier recovery processing and a version of the MAP phase detector algorithm. The symbol synchronization is accomplished with a derivative of an early-late gate designed to accommodate multilevel signals.
Document ID
19920047185
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Osborne, William (NASA Headquarters Washington, DC United States)
Carden, Frank (NASA Headquarters Washington, DC United States)
Kopp, Brian (NASA Headquarters Washington, DC United States)
Ross, Mike (New Mexico State University Las Cruces, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
Communications And Radar
Report/Patent Number
AIAA PAPER 92-1871
Meeting Information
Meeting: AIAA International Communication Satellite Systems Conference and Exhibit
Location: Washington, DC
Country: United States
Start Date: March 22, 1992
End Date: March 26, 1992
Accession Number
92A29809
Funding Number(s)
CONTRACT_GRANT: NAGW-1746
Distribution Limits
Public
Copyright
Other

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