Performance of the image statistics decoder in conjunction with the Goldstone-VLA array

Details Performance of the image statistics decoder in conjunction with the Goldstone-VLA array Performance of the image statistics decoder in conjunction with the Goldstone-VLA array

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989tdar.nasa..138w&link_type=abstract

In its The Telecommunications and Data Acquisition Report p 138-140 (SEE N90-12786 04-32)

Astronomy and Astrophysics

Astronomy

Bit Error Rate, Decoders, Images, Radio Astronomy, Signal To Noise Ratios, Telemetry, Very Large Array (Vla), Dropouts, Neptune (Planet), Pixels, Simulation

Scientific paper

During Voyager's Neptune encounter, the National Radio Astronomy Observatory's Very Large Array (VLA) will be arrayed with Goldstone antennas to receive the transmitted telemetry data from the spacecraft. The telemetry signal from the VLA will drop out periodically, resulting in a periodic drop in the received signal-to-noise ratio (SNR). The Image Statistics Decoder (ISD), which assumes a correlation between pixels, can improve the bit error rate (BER) for images during these dropout periods. Simulation results have shown that the ISD, in conjunction with the Goldstone-VLA array can provide a 3-dB gain for uncompressed images at a BER of 5.0 x 10(exp -3).

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