NASA NTRS · 19890010970
A long constraint length VLSI Viterbi decoder for the DSN
Abstract
A Viterbi decoder, capable of decoding convolutional codes with constraint lengths up to 15, is under development for the Deep Space Network (DSN). The objective is to complete a prototype of this decoder by late 1990, and demonstrate its performance using the (15, 1/4) encoder in Galileo. The decoder is expected to provide 1 to 2 dB improvement in bit SNR, compared to the present (7, 1/2) code and existing Maximum Likelihood Convolutional Decoder (MCD). The decoder will be fully programmable for any code up to constraint length 15, and code rate 1/2 to 1/6. The decoder architecture and top-level design are described.
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Statman, J. I., Zimmerman, G., Pollara, F., Collins, O.. 1988-11-15. A long constraint length VLSI Viterbi decoder for the DSN. https://ntrs.nasa.gov/citations/19890010970
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