Method of transmission - reception radar for the removal of distance ambiguity, the emitter - receiver using óoeuvre such a process and radar comprising such an emitter - receiver .

摘要

A method for resolving ambiguity in distance in which pulses are transmitted in bursts, each burst having a given repetition frequency fR and a given transmission frequency f, characterised in that: on transmission (1), a phase law (3) is applied so that each burst comprises a first part in which the phase is constant, and (k-1) parts (k being an integer) in which the phase is a quadratic multiple of the rank of the pulse in the part in question and in that: on reception (7), the inverse phase law (11) is applied, and a Doppler processing (12) is then carried out to extract, during the detection of a target with track p, the Doppler frequencies resulting from the distinct phase laws on transmission, which cause the appearance of apparent Doppler frequencies corresponding to a translation (13) proportional to the number of the track of the target of the Doppler frequency of this target. Application to radars with ambiguity in distance. IMAGE