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Pulse analysis using ordinal value filtering

  • US 5,917,733 A
  • Filed: 06/30/1995
  • Issued: 06/29/1999
  • Est. Priority Date: 01/16/1993
  • Status: Expired due to Fees
First Claim
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1. A method of pulse analysis applied to a signal conglomerate represented as a set of data samples in order to remove unwanted signals from wanted signals, comprising the following steps of:

  • a) ordinal value filtering at least a selected part of the signal conglomerate with a succession of filters of window sizes increasing from N (being less than M) up to M, an input to each successive filter being formed from an output of a previous filter;

    b) subtracting a current filter output from the previous filter output for said succession of filters to obtain bandpass outputs, known as granularities, consisting of strings of data points which contain strings of zero-valued data points, known as zero segments, and strings of non-zero-valued data points, known as non-zero segments or granules;

    c) selecting a subset of the granularities; and

    d) adding together granularities within said subset to produce an output signal containing the granules in said subset.

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