There follows a coherent radar pulses for the detection of the object of the target eclairs of very short time.

摘要

The invention relates to a method and system for a coherent radar pulses for the detection of a target having flash of very short duration. & br / this radar system comprises a transmitter (3, 4, 5) to emit coherent spaced pulses forming a periodic pattern and which can be distinguished from one another by a phase modulation according to the laws quasiorthogonales, the spacing means between the pulses being of the order of magnitude of the minimum duration of the flashes. At reception, the system comprises a single receiver (7) and a device (8) of coherent elimination of the clutter and the echoes of the body of the targets, followed by means of pulse compression (9.1 to 9.n), by correlation with the laws of modulations, in particular phase. The outputs of the processing channels are sent to a device (11) of the elimination of the secondary peaks due to the ambiguities partial. & br / the invention is applicable to systems of surveillance radar for the detection of helicopters.