Ranging system having reduced recognition jitter

Details Ranging system having reduced recognition jitter Ranging system having reduced recognition jitter

1979-04-03

1983-08-30

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 171R, 343 177, 367 97, G01S 1376, G01S 1574

Patent

active

044019874

ABSTRACT:
A ranging system employing a limiting constant false alarm rate (CFAR) receiver having reduced recognition time uncertainty, or recognition jitter. The jitter is made proportional to signal-to-noise ratio by providing the receiver with a two-part signal. A conditioning signal is provided to the receiver prior to the time the receiver is expected to sense and respond to a recognition signal for ranging. The conditioning signal has selected strength and duration sufficient to suppress noise to a desired extent in the receiver at the time the recognition signal is received. The combination of strength and frequency of the conditioning signal is selected so as to limit the probability of a false alarm, or undesired recognition of the conditioning signal in the receiver. Receiver modification is not required.

REFERENCES:
patent: 3755814 (1973-08-01), Alpers

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