Accession Number:

AD0618017

Title:

A COMPARISON OF SEISMIC ARRAY PROCESSING SCHEMES

Descriptive Note:

Technical note

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

Report Date:

1965-06-14

Pagination or Media Count:

23.0

Abstract:

It is the purpose in this note to discuss three of the many approaches to seismic array processing from the theoretical point of view. The three are 1 maximumlikelihood processing, 2 the minimum-variance, unbiased estimator MVU approach used by Levin, and 3 multichannel Wiener filtering. A feature common to these techniques is the formation of a single output waveform which serves as an estimator of the unknown signal coming from a fixed direction. We refer to such an output as a beam. It will be shown that 1 reduces to 2 in the case of gaussian noise and known signal parameters i.e., known epicenter and that 3 is related very simply to 2. In fact, the Wiener filtering output can be obtained directly from the MVU output. Both the sampleddata and continuous-time cases are treated. The note contains no new results.

Subject Categories:

  • Seismology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE