Device for removing the ambiguity over range and speed, used more especially in combination with a doppler type radar receiver and a radar containing it

摘要

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.