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Method for processing signals, particularly for oximetric measurements on living human tissue

  • US 5,113,861 A
  • Filed: 04/20/1989
  • Issued: 05/19/1992
  • Est. Priority Date: 05/09/1988
  • Status: Expired due to Fees
First Claim
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1. A method for deriving output signals from spurious signals having a frequency lying in a first frequency range and n multiplexed information signals having a frequency lying in a second frequency range that is different from said first frequency range, said method comprising the steps of:

  • passing said signals through a filter having an essentially blocking characteristic in said first frequency range and having an essentially transmitting characteristic in said second frequency range so as to produce a column matrix;

    providing a first n2 matrix function representing the deviation of the frequency range from an ideal transmission characteristic;

    deriving a second n2 matrix function inverted with respect to said first matrix function; and

    multiplying said column matrix at the output of said filter with said second n2 matrix function to generate said output signals.

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