US PATENT SUBCLASS 342 / 132
.~.~.~.~ With pulse modulation (e.g., "Chirp")

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

118  DF  DETERMINING DISTANCE {11}
128  DF  .~ With frequency modulation {3}
130  DF  .~.~ Plural modulation {1}
131  DF  .~.~.~ Combined with pulse modulation (e.g., frequency agile) {1}
132.~.~.~.~ With pulse modulation (e.g., "Chirp")

DEFINITION

Classification: 342/132

Within pulse modulation (e.g., "CHIRP"):

(under subclass 131) Subject matter including modulation of the frequency within the duration of the pulse modulation.

(1) Note. "CHIRP" is a technique for pulse compression which uses linear frequency modulation during the pulse.