Radar clutter removal by matrix processing

Communications: directive radio wave systems and devices (e.g. – Clutter elimination

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342162, 342194, 342195, G01S 13522

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active

057607346

ABSTRACT:
An apparatus and method for radar detection of spectral moments and other spectral characteristics of echoes includes an agile antenna which directs an antenna beam in a direction for a dwell interval. A clutter filter reduces clutter. In order to eliminate the need for fill pulses to stabilize the clutter filter, the clutter filtering is accomplished by matrix multiplication of the echo signal in each range bin by the inverse of the covariance matrix for that range. This reduces the dwell at each range interval, and provides a stream of pulse-to-pulse information at each range interval. The pulse-to-pulse data in each range interval is spectrum analyzed to extract the desired spectral information, which is displayed.

REFERENCES:
patent: 4577193 (1986-03-01), Kiuchi et al.
patent: 4622552 (1986-11-01), Andrews et al.
patent: 4742353 (1988-05-01), D'Addio et al.
patent: 5173706 (1992-12-01), Urkowitz
patent: 5617099 (1997-04-01), Warren et al.
"Clutter Suppression by Use of Weighted Pulse Trains", by T. Murakami and R.S. Johnson, RCA Missile and Surface Radar Division, Moorestown, NJ, published in RCA Review, vol. 32, Sep. 1971, pp. 402-429.

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