Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-12-26
2006-12-26
Patel, Jay K. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S132000, C375S135000, C375S146000, C340S870020
Reexamination Certificate
active
07154938
ABSTRACT:
The RF communications system of the present invention wirelessly communicates data without encountering undue interference problems with other devices and complies with rules governing unlicensed, spectrum-sharing devices. In an example embodiment, a transmitter device includes a digital subsystem powered by a power supply that processes data from another device and a radio frequency (RF) sub-system that transmits the processed data using a frequency hopping scheme. The RF sub-system includes a microprocessor arrangement that ON-OFF keys a voltage controlled oscillator (VCO) and provides a frequency-hopping scheme. The VCO is coupled to a signal frequency spreading arrangement that spreads the signal to a predetermined transmission bandwidth, wherein the frequency spreading occurs during an ON state of the ON-OFF keying and the transmission bandwidth exceeds a reception bandwidth at which the signal will be decoded.
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Cumeralto Scott
Devries Richard
Larson Gary
Itron, Inc.
Odom Curtis B.
Patel Jay K.
Patterson Thuente Skaar & Christensen P.A.
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