Symbol generator for phase modulated system
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United States of America Patent
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-
May 17, 1988
Grant Date -
N/A
app pub date -
Apr 15, 1986
filing date -
Apr 15, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A symbol generator is provided for generating a filtered analog waveform for use in phase modulating a carrier. A memory (30) is provided for storing predetermined waveform segments. The waveform segments are correlated with an input data stream. The data stream is converted to an address for the memory (30) to output a digital value to a D/A converter (122). The output of the D/A converter (122) is comprised of in-phase and quadrature-phase components which are input to a sample and hold circuit for generating the analog signals. The waveform segments are then sequentially assembled and input to a vector modulator (168).
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