US PATENT SUBCLASS 380 / 31
.~ Plural modulation of single carrier

Current as of: June, 1999
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380 /   HD   CRYPTOGRAPHY

9  DF  ELECTRIC SIGNAL MODIFICATION (E.G., SCRAMBLING) {18}
31.~ Plural modulation of single carrier {1}
32  DF  .~.~> Wobbling of carrier

DEFINITION

Classification: 380/31

Plural modulation of single carrier:

(under subclass 9) Subject matter which modulates a carrier with more than one signal or varies more than one signal parameter.

(1) Note. The additional signal may be scrambling signal or another information signal.

SEE OR SEARCH CLASS

370, Multiplex Communications,

204, for multiplexing by plural forms of modulation; subclasses 343+ and 480+ for combining or distributing information via frequency channels.

381, Electrical Audio Signal Processing Systems and Devices,

4+, for stereophonic signal broadcasting using an AM receiver.

455, Telecommunications, 61, for a carrier wave system using plural modulation for a signal message absent cryptos:graphic equipment.