MINIMUM-POWER ARRAY PROCESSING OF THE TFO LONG-NOISE SAMPLE
Advanced array research special rept. no. 12
TEXAS INSTRUMENTS INC DALLAS SCIENCE SERVICE DIV
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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.