Phase rotation of signals

Details Phase rotation of signals Phase rotation of signals

G - Physics

06

F

343/69

G06F 1/02 (2006.01) G01S 1/00 (2006.01) G01S 5/14 (2006.01) G06F 1/035 (2006.01)

Patent

CA 1261949

PHASE ROTATION OF SIGNALS Abstract of the Disclosure Phase rotation of an input digital signal is effected by applying the input signal to a look-up table in a memory together with a rotation control signal. The output of the memory is the phase rotated signal. To reduce the size of the PROM required for the look-up table advantage is taken of the symmetry of the quadrants through which the signal may be rotated. With a maximum 0° to 360° phase rotation range divided into four 90° quadrants a look-up table is only required for one quadrant. Thus the quadrant which the input signal is in is determined and the input signal transformed to correspond to the one quadrant by simple logic external to the PROM.

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