Computer Science
Scientific paper
Aug 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974oppt.workv....h&link_type=abstract
In Dynatrend, Inc. Proc. of Outer Planet Probe Technol. Workshop, Sect. 1 through 11 12 p (SEE N75-20358 12-12)
Computer Science
Data Links, Digital Simulation, Digital Systems, Radio Receivers, Algorithms, Atmospheric Entry, Channels (Data Transmission), Coding, Data Acquisition, Data Transmission, Planetary Atmospheres, Radio Relay Systems, Scintillation, Space Probes
Scientific paper
Digital simulation of the data link for the Saturn-Uranus spacecraft design is summarized. The data link is a 40 watt, 400 MegaHertz, 44 bit-a-second link, a power starved link, and uses convolution coding. Aspects of the link of particular interest are atmospheric scintillation and the Doppler to data rate ratio. The major characteristics of the scintillation are modeled in terms of tapped delay lines. A candidate system design and receiver design is developed. A computer flow diagram depicting a routine for the error rate and one for acquisition is presented. Various coding algorithms are analyzed since the convolution code is sensitive to the distribution of error and the actual pattern of the error.
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