Communications: directive radio wave systems and devices (e.g. – Determining distance – With pulse modulation
Patent
1988-10-31
1990-05-08
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Determining distance
With pulse modulation
342163, G01S 1342, G01S 1354
Patent
active
049242318
ABSTRACT:
A device for removing ambiguities in the range and speed at the output of a Doppler-type radar in which all possible sets (p.sub.1, q.sub.1) and (p.sub.2, q.sub.2) corresponding to echoes at different repetition frequencies are stored in a first memory, p.sub.1 and p.sub.2 representing the number of the range quantum from which an echo signal is received and q.sub.1 and q.sub.2 the number of the filter at the output of which an echo signal is maximum. Pairs of signals are supplied in response to a first clock signal together with radar data in a second memory to two calculating circuits which carry out tests to determine of p.sub.1 and p.sub.2 and q.sub.1 and q.sub.2 respectively come from the same target and calculate the true target distance and true Doppler frequency. If both tests are positive the true distance and frequency are stored in a memory. If either is negative the first clock signal is produced to supply a new pair to the respective calculating circuits.
REFERENCES:
patent: 4057800 (1977-11-01), Ganz
"Thomson-CSF"
Barron Jr. Gilberto
Tarcza Thomas H.
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