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SYSTEM AND METHOD FOR MITIGATING SEVERE MULTIPATH INTERFERENCE FOR GEOLOCATION & NAVIGATION

  • US 20130051434A1
  • Filed: 03/18/2009
  • Published: 02/28/2013
  • Est. Priority Date: 03/18/2008
  • Status: Active Grant
First Claim
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1. A method of mitigating multipath interference in a received signal comprising the steps of:

  • (a) receiving at a user a plurality of RF signals over time intervals from a transmitter, wherein at least one of the plurality of RF signals is a line-of-sight signal and wherein at least one of the plurality of RF signals is a multipath signal;

    (b) correlating each of the plurality of received signals with delayed versions of a corresponding replica waveform to form a two dimensional matrix, where matrix elements in one dimension correspond to different time intervals;

    (c) estimating a frequency spectrum of the two dimensional matrix; and

    (d) identifying, and separating out a signal path of the at least one line-of-sight signal and the at least one multipath signal from the spectrum by a value of phase rates associated with these paths.

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