Improvements to pulsed Doppler radars

摘要

The invention relates to a coherent pulsed Doppler radar system operating at a medium pulse repetition frequency. The pulses are emitted in a repetitive sequence b of blocks of recurrent pulses. The repetition frequencies of the blocks are randomly distributed over the range of medium repetition frequencies. The radar system is coupled to a fast elevation-scanning antenna which carries out b elevation scans covering a zone comprising q resolution cells in elevation and one resolution cell in bearing. Application to airborne surveillance radars. <IMAGE>