Accession Number:

AD0829859

Title:

MINIMUM-POWER ARRAY PROCESSING OF THE TFO LONG-NOISE SAMPLE

Descriptive Note:

Advanced array research special rept. no. 12

Corporate Author:

TEXAS INSTRUMENTS INC DALLAS SCIENCE SERVICE DIV

Personal Author(s):

• Burg, John P.
• Alam, Aftab
• Hair, George D.

Report Date:

1968-02-15

Pagination or Media Count:

50.0

Abstract:

The report investigates the effectiveness of the minimum-power array processing technique in determining seismometer inequalizations. The technique involves partitioning the seismometer array into two groups and designing MCFs for each group so that the mean-square-error between the two MCF outputs is a minimum under the constraint that the output power of one of the MCFs is unity. The two MCF sets are known as the group-coherence filters the difference between these sets is known as the minimum-power array processor. Estimates of the noise wavenumber spectrum from the wavenumber responses of the group- coherence filters are distorted due to seismometer inequalization however, a more reasonable estimate of the noise wavenumber spectrum from the wavenumber response of the minimum-power array processor should be possible because the minimas in the processors wavenumber response correspond to the wavenumber regions where the wavenumber responses of the two group-coherence MCFs are very similar e.g., at the peaks of the noise wavenumber power spectrum.

Descriptors:

• *SEISMOLOGICAL STATIONS
• ARIZONA
• DETECTION
• DISTORTION
• EARTHQUAKES
• ELECTROMAGNETIC WAVE FILTERS
• ENERGY
• ERRORS
• LEAST SQUARES METHOD
• MATHEMATICAL PREDICTION
• NOISE
• NUCLEAR EXPLOSIONS
• PHASED ARRAYS
• POWER SPECTRA
• RESPONSE
• SEISMOMETERS
• SIGNAL TO NOISE RATIO

Subject Categories:

• Seismology
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE