Baseband phase modulator apparatus employing digital techniques
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United States of America Patent
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Aug 2, 1988
Grant Date -
N/A
app pub date -
Apr 2, 1987
filing date -
Apr 2, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is disclosed a Zero IF modulator apparatus for modulating carrier signals with baseband signals, the modulator includes digital logic circuitry including a sine/cosine amplitude converter which is responsive to the baseband signals for providing first and second digital quadrature baseband signals. These digital quadrature baseband signals are then employed by coupling the same to digital-to-analog converters where the outputs of each converter is indicative of a first and second quadrature signal. These signals can then be translated to a given carrier signal for transmission over a desired communication channel.
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