Microwave and Radar Engineering

14

MTI and Pulse Doppler Radars

14.1 INTRODUCTION

Radars usually receive the echoes scattered by the natural environment as well including land, sea and weather when detecting the targets in motion such as aircrafts or ships. These echoes from the natural environment are called clutter, which creates confusion on the radar display. When a clutter and the target echo appear in the same radar resolution cell, it is difficult to distinguish the aircraft, because the magnitude of the strength of the clutter echoes is many times larger than the aircraft echoes. The most efficient technique for detecting moving targets when there is large clutter is Doppler processing. When there is relative motion between radar and the moving target then there is ...