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Integrated radio location and communication system

  • US 4,651,156 A
  • Filed: 02/28/1985
  • Issued: 03/17/1987
  • Est. Priority Date: 02/08/1982
  • Status: Expired due to Fees
First Claim
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1. A radio location and communication system of the phase ranging type comprising:

  • a stationary broadcast means for transmitting a continuous RF carrier signal, said stationary broadcast means including means for generating a carrier range tone signal synchronized with said continuous RF carrier signal and for transmitting, on said continuous RF carrier signal, a periodic carrier rang tone signal comprising a carrier range tone signal burst,one or more mobile locator transmission means phase-locked to the RF carrier signal from said broadcast means for continuously generating a transmitter range tone signal periodically synchronized by said periodic carrier range tone signal burst from said stationary braodcast means, and for transmitting said transmitter range tone signal at specific times between the periodic carrier range tone signal bursts, anda plurality of stationary receiving means, each for detecting the carrier range tone signal burst from said stationary broadcast means and generating a continuous receiving means range tone signal synchronized by said periodic carrier range tone signal burst from said stationary broadcast means and for detecting said transmitter range tone signal from said locator transmission means and phase comparing said receiving means range tone signal and said transmitter range tone signals from the mobile unit for the computation of the location of said locator transmission means, whereby the mobile locator transmission means and the plurality of stationary receiving means are periodically resynced by the stationary broadcast means, and may be used a plurality of times thereafter to determine the location of the mobile locator transmission means prior to the next resyncing thereof.

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