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Method and apparatus for combining multipath spread-spectrum signals

  • US 5,353,301 A
  • Filed: 09/17/1993
  • Issued: 10/04/1994
  • Est. Priority Date: 09/17/1993
  • Status: Expired due to Fees
First Claim
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1. A spread-spectrum signal multipath combiner, comprising:

  • (a) matched filtering means for detecting an envelope of an input differential phase shift keyed signal communicated over a communication channel;

    (b) envelope detector means, operatively coupled to the matched filtering means, for detecting a replica of a multipath echo structure for the communication channel within the detected envelope;

    (c) combiner means, operatively coupled to the matched filtering means and the envelope detector means, for combining the input differential phase shift keyed signal with the detected replica of the multipath echo structure for the communication channel such that a multipaten echo structure weighted differential phase shift keyed signal is formed; and

    (d) integrator means, operatively coupled to the combiner means, for integrating the multipath echo structure weighted differential phase shift keyed signal over a one symbol period centered on a correlation peak such that power from a plurality of signal paths determines an output data bit.

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