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Flexible digital modulation and coding synthesis for satellite communicationsAn architecture and a hardware prototype of a flexible trellis modem/codec (FTMC) transmitter are presented. The theory of operation is built upon a pragmatic approach to trellis-coded modulation that emphasizes power and spectral efficiency. The system incorporates programmable modulation formats, variations of trellis-coding, digital baseband pulse-shaping, and digital channel precompensation. The modulation formats examined include (uncoded and coded) binary phase shift keying (BPSK), quatenary phase shift keying (QPSK), octal phase shift keying (8PSK), 16-ary quadrature amplitude modulation (16-QAM), and quadrature quadrature phase shift keying (Q squared PSK) at programmable rates up to 20 megabits per second (Mbps). The FTMC is part of the developing test bed to quantify modulation and coding concepts.
Document ID
19920005017
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Vanderaar, Mark (Sverdrup Technology, Inc., Brook Park OH., United States)
Budinger, James (Ohio Univ. Athens., United States)
Hoerig, Craig (NASA Lewis Research Center Cleveland, OH, United States)
Tague, John (Ohio Univ. Athens., United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1991
Publication Information
Publication: Space Communications Technology Conference: Onboard Processing and Switching
Subject Category
Communications And Radar
Accession Number
92N14235
Funding Number(s)
CONTRACT_GRANT: NAS3-25266
CONTRACT_GRANT: NAG3-1183
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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