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Method and system for testing a signal path having an operational signal

  • US 7,271,596 B2
  • Filed: 09/16/2005
  • Issued: 09/18/2007
  • Est. Priority Date: 11/19/2002
  • Status: Active Grant
First Claim
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1. A method of testing a signal path comprising:

  • a) receiving an operational signal from the signal path, wherein the operational signal is present within the system during operation and is not an injected test signal;

    b) estimating a correlation of the operational signal at a time-offset wherein the correlation is the expectation of the product of the operational signal and a reference signal; and

    c) determining a characteristic of the signal path from the correlation.

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