×

Direction finding localization system

DC
  • US 4,728,959 A
  • Filed: 08/08/1986
  • Issued: 03/01/1988
  • Est. Priority Date: 08/08/1986
  • Status: Expired due to Term
First Claim
Patent Images

1. A localization system for determining the position of a mobile radio transmitter station using a network of interconnected land stations having known locations, comprising:

  • an antenna array configuration at at least two land stations for receiving radio frequency (RF) signals emitted from the mobile radio transmitter station, said configuration comprising at least one pair of antenna elements, each antenna element positioned to transform the RF signal into a corresponding RF electrical signal;

    means for measuring a direction angle of the mobile radio transmitter station from at least two land stations by phase difference measurement, including means for performing a phase sensitive weighted integration of a complex conjugate product of an equivalent analytic signal wave form of the RF electrical signal in each antenna element; and

    means for processing said direction angle measurements from said at least two land stations to determine a location for the mobile radio transmitter

View all claims
  • 8 Assignments
Timeline View
Assignment View
    ×
    ×