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Code multipath analyzer using weighted or modified correlations

  • US 6,130,908 A
  • Filed: 10/31/1997
  • Issued: 10/10/2000
  • Est. Priority Date: 10/31/1997
  • Status: Expired due to Term
First Claim
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1. An apparatus for analyzing a composite signal, wherein said composite signal includes a direct signal transmitted from at least one satellite and an incoming code multipath distortion component;

  • said apparatus comprising;

    a satellite code channel tracking circuit configured to receive said composite signal;

    wherein said satellite code channel tracking circuit is configured to generate a satellite code tracking function having a tracking code multipath distortion component;

    wherein said satellite code channel tracking circuit further comprises;

    at least two partial code tracking circuits, wherein each said partial tracking circuit is used to minimize said tracking code multipath distortion component;

    wherein said minimized tracking code multipath distortion component comprises a residual tracking code multipath distortion component; and

    at least one additional estimation tracking circuit;

    wherein each said additional estimation circuit is used to estimate and further minimize said residual tracking code multipath distortion component; and

    an analyzing circuit connected to said satellite code channel tracking circuit; and

    wherein said analyzing circuit is configured to analyze said residual tracking code multipath distortion component.

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