Feasibility Study of Mixed-Signal Separation Techniques

Abstract

A fesibility study to enhance a weaker signal hidden in the stronger wavetrains of different seismic sources was conducted. Two array beamforming methods were developed for and applied to the mixed-signal problem: one is the adaptive beamformer (ABF) and the other is array shading technique. The ABF operates in the time domain, requires no a priori information, and can be used for a front-end detector. The array shading technique is designed in the frequency domain, needs interfering azimuth for null steering, and is intended for a post-detection processor. Results from experimental tests with recorded data from the Korean Seismic Research Station short-period array are also included.

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Document Details

Document Type
Technical Report
Publication Date
Jul 12, 1978
Accession Number
ADA066715

Entities

People

  • Wen-wu Shen

Organizations

  • Texas Instruments

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Air Force
  • Composite Materials
  • Computations
  • Detection
  • Detectors
  • Earthquakes
  • Equations
  • Filters
  • Filtration
  • Frequency Domain
  • Geometry
  • Numbers
  • Seismic Arrays
  • Simultaneous Equations
  • Steering
  • Variational Principles
  • Waves

Fields of Study

  • Engineering

Readers

  • Image Processing and Computer Vision.
  • Phased Array Antenna Design.
  • Seismology