Digital circuit for decoding encoded doppler data

Details Digital circuit for decoding encoded doppler data Digital circuit for decoding encoded doppler data

1995-04-07

1995-11-07

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375371, 342202, 342402, 342418, H04L 2700

Patent

active

054652740

ABSTRACT:
An electronics circuit receives a sub frame of encoded doppler data having roups One through N of data words with the first three words of Group N comprising a frame sync signal which is compared to a reference signal with a sync pulse being generated whenever the signals are identical. This sync pulse is supplied to three counters to load each counter with a predetermined count. The first counter counts the number of words in each Group; the second counter counts the number of Groups in a sub frame and the third counter indicates the location of Automatic Gain Control and Word Width data within the sub frame. Encoded within each group of a Sub Frame are one or more clusters of doppler words with a fourth counter indicating the location of these clusters of doppler words. A word decoder circuit in response to a gain signal and a word width data signal decodes each word of each group of the sub frame having doppler data to extract the doppler data.

REFERENCES:
patent: 4187491 (1980-02-01), Lindstrum et al.
patent: 4764942 (1988-08-01), Shigaki et al.

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