Coded data generation or conversion – Digital code to digital code converters – To or from nrz codes
Patent
1997-10-03
1999-11-16
Williams, Howard L.
Coded data generation or conversion
Digital code to digital code converters
To or from nrz codes
H03M 512
Patent
active
059865903
ABSTRACT:
A phased array antenna system having an array of antenna elements coupled to radio frequency energy feed network through a plurality of phase shifter sections with digital control data being fed to the phase shifter sections with radio frequency energy signal modulated with the digital control data. A modulator is fed by the source of the radio frequency energy and a modulating signal to produce the modulated radio frequency energy signal. A modulating signal generator/encoder, fed by the digital control data, encodes each bit of such digital control data into the modulating signal, such modulating signal being a bipolar signal having a pair of electrical signal changes corresponding to a binary state represented by such bit. The modulated radio frequency energy signal may be fed to the demodulator through the radio frequency feed network or through the antenna element coupled thereto. The demodulator section produces a demodulated bipolar signal corresponding to the bipolar modulating signal and decodes the demodulated bipolar signal into a binary signal having logic states corresponding to the binary states represented by the encoded bits of the bipolar modulating signal. An output section is fed by the detector and decoder section for converting the binary signal produced by the detector and decoder section into the digital words for the phase shifter section. The digital control data includes a strobe signal. The plurality of phase shifter sections act to properly configure themselves to radio frequency energy passing therethrough in accordance with control words addressed thereto in response to detection of the strobe signal.
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Brunel L. E. Andre
Smith Irl W.
Raytheon Company
Williams Howard L.
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