Real time analysis of waves
Abstract
Abstract PEAKS REPRESENTATIVE OF ECHOES. ADVANTAGEOUSLY (AND UNLIKE THE LOG OPERATION OF THE CEPSTRUM), PROCESSING MAY BE CARRIED OUT ECONOMICALLY ON A COMPUTER. DEFICIENCIES, BOTH FUNCTIONAL AND COMPUTATIONAL, IN THE DETECTION AND MEASUREMENT OF ECHOES IN A TIME SERIES FUNCTION BY MEANS OF A CEPSTRUM OPERATION ARE LARGELY OVERCOME BY REPLACING THE LOGARITHMIC STAGE OF THE CEPSTRUM ANALYZER BY A MORE IDEAL COMPRESSOR FUNCTION. ACCORDING TO THE INVENTION, SPECTRUM RIPPLE COMPONENTS ARE MADE INDEPENDENT OF THE SPECTRUM LEVEL BY DIVIDING EACH POINT IN THE SPECTRUM BY AN ESTIMATE OF THE LOCAL MEAN, AND THE EFFECT OF STRONG PERIODICITIES IN THE TIME SERIES ARE REDUCED BY SPECTRAL LIMITING. FINALLY, THE SPECTRUM OF THE MEAN-CORRECTED, LIMITED SPECTRUM IS DEVELOPED TO YIELD
Inventors
- 👤 P Hirsch
Bibliographic Details
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