DESIGN AND EVALUATION OF CERTAIN MULTICHANNEL FILTERS
Abstract
The theory of optimum least-squares multichannel filters is developed from the definitions of correlation functions and power spectra. Four types of these optimum processors were applied to an Aleutian earthquake recorded by part of the Montana LASA and the results evaluated. It appears that certain isotropic processors can give a modest signal-to-noise ratio improvement in excess of 1 db over the prefiltered straight sum. Evaluation of the outputs and transfer functions of these filters gives some insight into methods for improving their gain and stability. Several other topics are discussed from a theoretical point of view; these include estimation of power spectral density functions, frequency-wavenumber spectra, and certain coherence functions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 26, 1968
- Accession Number
- AD0828731
Entities
People
- D. W. Mccowan
Organizations
- Teledyne Technologies