Minimum variance array processing in an ocean waveguide

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Minimum variance array processing in an ocean
waveguide

• by Joseph Sikora III

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Project 1 Acoustic Modeling

• Two-way wave equation
• Efficiently compute K2Dut ut1

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Project 2 Experiment
boat
array
source
sound path
water
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Beamforming

• c1500 m/s
• N sensors
• d m spacing

d
0
N-1
1
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Beamformer Response
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Interfering Signals???
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MVDR Beamformer
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Constraint
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MVDR Weight vector
u(ATC-1A)-1ATC-1b
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Covariance Matrix Conditioning
Rule of Thumb
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Data and Results Example 1
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MVDR Beamformer Response
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MVDR variance
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Undersampled Sn
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Undersampled Sn MVDR variance
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Example 2
Undersampled Sn
Oversampled Sn
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MVDR Beamformer
Conventional Beamformer
Time
Time
Angle
Angle