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Method and apparatus for multipath parameter estimation in spread-spectrum communications systems

  • US 6,700,929 B1
  • Filed: 07/31/2000
  • Issued: 03/02/2004
  • Est. Priority Date: 07/31/2000
  • Status: Active Grant
First Claim
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1. A method of characterizing a secondary signal propagation path relative to a main signal propagation path, said method comprising:

  • (a) receiving a first multipath signal that includes a main path signal received through said main signal propagation path and a secondary path signal through said secondary signal propagation path;

    (b) comparing a magnitude of said secondary path signal with a magnitude of said main path signal to determine a relative magnitude of said secondary path signal to said main path signal;

    (c) identifying corresponding symbols in said main and secondary path signals;

    (d) comparing said corresponding symbols in said main path and secondary path signals to determine a relative time offset between said secondary path signal and said main path signal; and

    (e) comparing corresponding symbols in said main and secondary path signals to determine a relative phase of said secondary path signal to said main path signal;

    wherein said relative magnitude, time offset, and phase determined for said first multipath signal are used to improve reception performance for a subsequent multipath signal received through said main and secondary signal propagation paths.

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