Communications: directive radio wave systems and devices (e.g. – With particular circuit – Display
Patent
1986-01-27
1989-07-04
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Display
G01S 704, H04N 701
Patent
active
048455016
ABSTRACT:
A marine radar system having a multi-plane video memory for storing scan-to-scan integrated video data used to raster scan the CRT. A scan converter generates cartesian or x,y addresses for the video memory and synchronous with the generation of each, x,y address, generates a range address for reading corresponding video data from an r,.theta. or polar memory. The x,y addresses are generated along azimuth sweeps by incrementing one coordinate by a pixel unit and the other coordinate by a trigonometric function. The unit coordinate and the trigonometric function are determined by the 45.degree. octant in which the azimuth sweep is located. The pixel unit incremented coordinate is offset by one pixel unit from the origin of the azimuth sweep in alternate octants to address pixels along the octant boundaries and thereby avoid display artifacts.
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Pease William M.
Pope Albert A.
Clark William R.
Raytheon Company
Sharkansky Richard M.
Sotomayor John B.
Tarcza Thomas H.
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