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Least reliable bits coding (LRBC) for high data rate satellite communicationsLRBC, a bandwidth efficient multilevel/multistage block-coded modulation technique, is analyzed. LRBC uses simple multilevel component codes that provide increased error protection on increasingly unreliable modulated bits in order to maintain an overall high code rate that increases spectral efficiency. Soft-decision multistage decoding is used to make decisions on unprotected bits through corrections made on more protected bits. Analytical expressions and tight performance bounds are used to show that LRBC can achieve increased spectral efficiency and maintain equivalent or better power efficiency compared to that of BPSK. The relative simplicity of Galois field algebra vs the Viterbi algorithm and the availability of high-speed commercial VLSI for block codes indicates that LRBC using block codes is a desirable method for high data rate implementations.
Document ID
19920047183
Document Type
Conference Paper
Authors
Vanderaar, Mark (Sverdrup Technology, Inc. Brook Park, OH, United States)
Budinger, James (NASA Lewis Research Center Cleveland, OH, United States)
Wagner, Paul (Sverdrup Technology, Inc. Brook Park, OH, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
COMMUNICATIONS AND RADAR
Report/Patent Number
AIAA PAPER 92-1868
Meeting Information
AIAA International Communication Satellite Systems Conference and Exhibit(Washington, DC)
Funding Number(s)
CONTRACT_GRANT: NAS3-25266
Distribution Limits
Public
Copyright
Other