US PATENT SUBCLASS 342 / 99
.~.~.~ Doppler frequency tracking

Current as of: June, 1999
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342 /   HD   COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)

73  DF  RETURN SIGNAL CONTROLS RADAR SYSTEM {3}
89  DF  .~ Receiver {4}
98  DF  .~.~ Frequency {2}
99.~.~.~ Doppler frequency tracking {2}
100  DF  .~.~.~.~> Wtih local osillator control
101  DF  .~.~.~.~> With filter control

DEFINITION

Classification: 342/99

Doppler frequency tracking:

(under subclass 98) Subject matter wherein circuitry is provided to follow variations in the doppler component of the returned signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

84, for radar transmitter control by returned signal control as a function of doppler frequency.

104+, for velocity determination by radar using doppler techniques.

171, for testing radar apparatus with simulated doppler signals.