Communications: directive radio wave systems and devices (e.g. – Return signal controls radar system – Receiver
Patent
1985-05-24
1987-12-15
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls radar system
Receiver
342160, G01S 1352
Patent
active
047136642
ABSTRACT:
An adaptive detection threshold system for moving target detector and moving target indicator radar systems. The threshold system uses data from the echo input signal to reconstruct a threshold level closely resembling the output clutter residue in doppler filters due to point clutter sources. At least three azimuth data values are used, with the values being from adjacent coherent processing intervals and separated in azimuth a distance approximately equal to the beamwidth of the antenna system. The data at the same range from the three azimuths is combined to form an estimate of the residue at the output of a doppler filter, assuming that the echo is caused by point clutter. Compensation for radar instability and changes in scan rate or interpulse period is included. Data from conventional constant false alarm rate processing designed to control alarms from distributed interference, such as weather echoes, is also used to compensate the residue estimate.
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Barron Jr. Gilberto
Blum Theodore M.
Westinghouse Electric Corp.
Yatsko M. S.
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