Digital phase rotation of signals

Details Digital phase rotation of signals Digital phase rotation of signals

1986-03-20

1989-02-21

Harkcom, Gary V.

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36471507, H03H 1708, G01S 514

Patent

active

048071714

ABSTRACT:
A method and apparatus for effecting phase rotation of a digital signal by applying said digital signal as partial address signals for a look-up table in a memory together with rotation control signals forming additional address signals whereby the memory output represents the phase rotated signal, characterized in that each input vector is modified so that points representing digitized input vector values plotted on a rectangular coordinate grid are transformed to lie on an alternative coordinate system and the rotated vectors are retransformed and requantized to a digital output.

REFERENCES:
patent: 3927312 (1975-12-01), Dickinson
patent: 4231102 (1980-10-01), Barr et al.
patent: 4601005 (1986-07-01), Kilvington

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