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System and method for improved spread spectrum signal detection

  • US 5,909,462 A
  • Filed: 12/31/1996
  • Issued: 06/01/1999
  • Est. Priority Date: 12/31/1996
  • Status: Expired due to Term
First Claim
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1. For use in a direct sequence spread spectrum (DSSS) receiver adapted to receive a differential phase shift keyed (DPSK) packet on a channel, said DPSK packet having a training preamble and a data portion, a system to improve detection of said packet under degraded channel conditions, comprising:

  • a detection circuit that derives phase information from symbols in said packet and a weight that is a function of an estimated power profile for said channel; and

    a computation circuit that computes a weighted average for said phase information using said weight, said weighted average being power profile-based to allow said receiver to detect said channel more reliably under said degraded channel conditions.

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