Design of airborne adaptive recursive MTI filter for detecting targets of slow speed

Owing to the narrow distance in the Doppler frequency domain between slow speed targets and ground clutter, it is difficult to suppress effectively clutter without attenuating target signals. A solution is to adopt the recursive MTI filter. This paper presents a flexible design method of this kind of filter. It not only adaptively adjusts filter parameters according to real clutter conditions, but also can prevent slow speed targets from attenuation. A simulation example proves the effectiveness of the design method.