Investigation of Spread Clutter Mitigation for Oth Radar Using an Adaptive Noise Canceller

Abstract

Spread clutter is a phenomenon affecting over-thehorizon radars whereby the Doppler spectrum in the vicinity of zero Hertz becomes corrupted by clutter returns, thus obscuring low velocity target signals. The suppression of spread clutter using adaptive noise cancelling techniques is analysed and the consequences for detection and tracking performance are discussed. The analysis is carried out using data from the Australian Jindalee over-the-horizon radar at Alice Springs.