US PATENT SUBCLASS 375 / 279
.~.~ Phase shift keying

Current as of: June, 1999
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375 /   HD   PULSE OR DIGITAL COMMUNICATIONS

259  DF  SYSTEMS USING ALTERNATING OR PULSATING CURRENT {4}
271  DF  .~ Angle modulation {2}
279.~.~ Phase shift keying {4}
280  DF  .~.~.~> More than two phases {1}
282  DF  .~.~.~> Biphase (manchester codes)
283  DF  .~.~.~> Differential phase shift keying (diphase)
284  DF  .~.~.~> Antinoise or distortion

DEFINITION

Classification: 375/279

Phase shift keying:

(under subclass 271) Subject matter wherein the instantaneous phase of the carrier wave departs from a reference phase in accordance with the transmission of pulses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

223, for phase shift keyed transceivers.

273, for phase shift keyed combined with frequency shift keyed systems.

308, for phase shift keyed transmitter.

329+, for phase shift keyed receivers.

SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and Elements,

183, for a phase modulated light wave transmitter.

455, Telecommunications,

23, for phase shift keyed repeaters.