Digital simulation of a communication link for Pioneer Saturn Uranus atmospheric entry probe, part 1

Details Digital simulation of a communication link for Pioneer Saturn Uranus atmospheric entry probe, part 1 Digital simulation of a communication link for Pioneer Saturn Uranus atmospheric entry probe, part 1

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975dscl.reptq....h&link_type=abstract

Unknown

Computer Science

Performance

Atmospheric Entry, Data Links, Digital Simulation, Pioneer Space Probes, Planetary Atmospheres, Atmospheric Models, Doppler Radar, Phase Demodulators, Phase Modulation, Scintillation

Scientific paper

A digital simulation study is presented for a candidate modulator/demodulator design in an atmospheric scintillation environment with Doppler, Doppler rate, and signal attenuation typical of the conditions of an outer planet atmospheric probe. The simulation results indicate that the mean channel error rate with and without scintillation are similar to theoretical characterizations of the link. The simulation gives information for calculating other channel statistics and generates a quantized symbol stream on magnetic tape from which error correction decoding is analyzed. Results from the magnetic tape data analyses are also included. The receiver and bit synchronizer are modeled in the simulation at the level of hardware component parameters rather than at the loop equation level and individual hardware parameters are identified. The atmospheric scintillation amplitude and phase are modeled independently. Normal and log normal amplitude processes are studied. In each case the scintillations are low pass filtered. The receiver performance is given for a range of signal to noise ratios with and without the effects of scintillation. The performance is reviewed for critical reciever parameter variations.

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