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Error Control Techniques for Satellite and Space CommunicationsIn this report, we present the results of our recent work on turbo coding in two formats. Appendix A includes the overheads of a talk that has been given at four different locations over the last eight months. This presentation has received much favorable comment from the research community and has resulted in the full-length paper included as Appendix B, 'A Distance Spectrum Interpretation of Turbo Codes'. Turbo codes use a parallel concatenation of rate 1/2 convolutional encoders combined with iterative maximum a posteriori probability (MAP) decoding to achieve a bit error rate (BER) of 10(exp -5) at a signal-to-noise ratio (SNR) of only 0.7 dB. The channel capacity for a rate 1/2 code with binary phase shift-keyed modulation on the AWGN (additive white Gaussian noise) channel is 0 dB, and thus the Turbo coding scheme comes within 0.7 DB of capacity at a BER of 10(exp -5).
Document ID
19960022774
Acquisition Source
Goddard Space Flight Center
Document Type
Contractor Report (CR)
Authors
Costello, Daniel J., Jr.
(Notre Dame Univ. IN United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1996
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Report/Patent Number
NAS 1.26:200976
NASA-CR-200976
Accession Number
96N25669
Funding Number(s)
CONTRACT_GRANT: NAG5-557
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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