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Stochastic-constraints method in nonstationary hot-clutter cancellation. I. Fundamentals and supervised training applications

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4 Author(s)
Y. I. Abramovich ; Cooperative Res. Centre for Sensor Signal & Inf. Process., Mawson Lakes, SA, Australia ; N. K. Spencer ; S. J. Anderson ; A. Y. Gorokhov

This paper considers the use of spatio-temporal adaptive array processing in over-the-horizon radar (OTHR) and airborne radar applications in order to remove nonstationary multipath interference, known as “hot clutter”. Since the spatio-temporal properties of hot clutter cannot be assumed constant over the coherent processing interval (CPI), conventional adaptive techniques fail to provide effective hot-clutter mitigation without simultaneously degrading the properties of the backscattered radar signals, known as “cold clutter”. The approach presented incorporates multiple “stochastic” (data-dependent) constraints to achieve effective hot-clutter suppression, while maintaining distortionless output cold-clutter post-processing stationarity

Published in:

IEEE Transactions on Aerospace and Electronic Systems  (Volume:34 ,  Issue: 4 )