MOVING TARGET INDICATION RADAR

Abstract

MTI (Moving Target Indication) radar systems have been built for many years, based on system concepts evolved in the early 1950's. Digital techniques now permit easier implementation, but do not change the basic concepts; staggered repetition periods to eliminate blind speeds; and MTI cancellers with the velocity response shaped by feed forward and feedback techniques. Radar MTI may be specialized in terms of the type of clutter and environment: airborne MTI (AMTI), ground MTI (GMTI), etc., or may be combined mode: stationary and moving target indication (SMTI).The most common approach takes advantage of the Doppler Effect.  Many of the existing systems are very successful considering their performance, measured in terms of MTI improvement factor or sub clutter visibility. In this paper the basic MTI concepts and definitions are presented, and the real problems of modern surface-based MTI radar systems are discussed.