Abstract
This paper addresses the problem of mitigating non-stationary diffusely scattered multipath interference or “hot clutter” by space-time adaptive processing (STAP) in radar systems that use a multi-channel receive antenna array. A computationally efficient time-varying (TV) fast-time STAP algorithm that can effectively cancel hot clutter during the coherent processing interval (CPI) while simultaneously preserving the Doppler spectrum characteristics of the ordinary backscattered “cold clutter” is proposed. The TV-STAP method is compared with several benchmark techniques in a numerical study simulating aircraft and ship detection in over-the-horizon (OTH) radar.
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