Communications: directive radio wave systems and devices (e.g. – With particular circuit – Digital processing
Patent
1986-06-04
1988-06-07
Tubbesing, T. H.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Digital processing
342 93, G01S 744
Patent
active
047499940
ABSTRACT:
Method for determining and using clutter estimates in a radar clutter map. The method does not require synchronization of the transmitted radar pulses with the azimuth coordinates of the map cells. Data inputs close to each map azimuth location are used to estimate the echo amplitude in the map cell which would result if the antenna beam was pointing directly at the clutter when one data sample occurred. A burst of pulses are transmitted and return echoes are processed to produce clutter signals at least twice within the time it takes for the antenna to scan one beamwidth. Clutter echoes received adjacent in azimuth to the map cell for which the value is being calculated are converted by a formula into a value for adjusting the present map cell value. The formula takes into consideration the magnitude of the values, the difference between the values, the antenna beam width, and the azimuth spacing of the samples. The map values are outputted for threshold level control by other techniques including the selection of the larger of the two stored cell values straddling the azimuth of the threshold controlled signal.
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Barron Jr. Gilberto
Sutcliff W. G.
Tubbesing T. H.
Westinghouse Electric Corp.
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