G - Physics – 01 – S
Patent
G - Physics
01
S
343/99
G01S 1/02 (2006.01) G01S 1/68 (2006.01) G01S 3/02 (2006.01) G01S 5/02 (2006.01)
Patent
CA 1155533
METHOD OF AND SYSTEM FOR CLASSIFYING EMERGENCY LOCATING TRANSMITTERS AND EMERGENCY POSITION INDICATING RADIO BEACONS ABSTRACT: During a distress call, a distress location transmitter 10 generates a high frequency carrier signal 40 that is modulated by a predetermined distress waveform characteristic 29. The classifi- cation of user associated with the distress call is identified by periodically interrupting modulation 42; user classification is determined by the repe- tition rate of the interruptions, the interruption periods, or both.
351194
Johnson & Hicks
Wren Paul E.
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