Development of Three Signal Processing Techniques. VELA Network Evaluation and Automatic Processing Research
Abstract
The gain in signal-to-noise ratio with respect to a bandpass filter was investigated as a function of input signal-to-noise ratio for a Wiener filter, a matched filter, and the three component adaptive filter. Each processor was applied to two southern Kamchatka events recorded at a single-site at the Alaskan Long Period Array (ALPA) and buried in two noise samples recorded there. A representative southern Kamchatka earthquake seismogram was formed by averaging spectra of events from that region. The Wiener filter used the resulting average power spectrum but no signal-noise correlation terms to achieve a 3 to 6 dB maximum gain over the bandpass filter. The average event was also used as a matched filter, which had a gain of 6 to 10 dB over the bandpass filter. With the help of a Monte Carlo simulation to determine the best form for the filter weights, the three component adaptive filter had a gain of from 10 to 17 dB over the bandpass filter.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 29, 1976
- Accession Number
- ADA041225
Entities
People
- Stephen S. Lane
Organizations
- Texas Instruments