MTI System processor and method

摘要

A method and apparatus for removing the effects of radar platform movement and for otherwise processing doppler radar signals in a moving target indicator doppler radar in which targets in the main beam having reflective characteristics sufficient to override side lobe attenuation are tracked relative to the side lobes and the residual doppler frequency for such targets resulting from side lobe detection calculated. Based on this calculation, the appropriate ones of a bank of doppler filters are inhibited at the appropriate range bin to prevent a false target indication without inhibiting the display of moving targets in the main beam at the same range but having different doppler frequencies. A novel automatic gain control circuit which provides dynamic amplitude adjustment of the radar return signal to match the dynamic range of the radar processor on a range bin-by range bin basis is also provided as is a novel signal processing circuit for removing the effects of radar platform movement from the radar return signal. The use of a sensitivity time control is disclosed as is the method of vector rotation and quadrant resolution.