US PATENT SUBCLASS 370 / 206
.~ Quadrature carriers

Current as of: June, 1999
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370 /   HD   MULTIPLEX COMMUNICATIONS

203  DF  GENERALIZED ORTHOGONAL OR SPECIAL MATHEMATICAL TECHNIQUES {5}
206.~ Quadrature carriers {1}
207  DF  .~.~> Having a signaling constellation

DEFINITION

Classification: 370/206

Quadrature carriers:

(under subclass 203) Subject matter wherein two carrier frequencies are 90 degrees in phase (i.e., quadrature or orthogonal in phase), e.g., sin2 wt and cos2 wt.

SEE OR SEARCH CLASS

375, Pulse or Digital Communications,

235, for equalizing of digital quadrature channels.

381, Electrical Audio Signal Processing Systems and Devices,

19+, for quadrasonic stereo channels.