DocumentCode
2816240
Title
Saw Tooth Bias in Digital Split Beam Trackers
Author
LaTourette, Robert A.
fYear
1981
fDate
16-18 Sept. 1981
Firstpage
992
Lastpage
997
Abstract
Inaccurate dlpole spacing modeling causes Sawtooth bias in digital split-beam trackers. This paper presents a unified treatment of the generalized dipole spacing model for a complex array and discusses the parametric dependence in detail. The study conducted revealed that in addition to conventional array/beamformer parameters, the dipole spacing depended on "quadrature" angular offset from bore- sight and signal-to-noise ratio. The former resulted from an effective phase shading, induced by discrete beamformer delays. The latter occurred with clipped beamformer and appeared as an amplitude shading induced by the hydrophone beam pattern. The magnitude of these effects varied with signal spectrum.
Keywords
array signal processing; delays; hydrophones; sonar signal processing; sonar tracking; amplitude shading; boresight; clipped beamformer; digital split beam trackers; discrete beamformer delays; dlpole spacing modeling; hydrophone beam pattern; phase shading; quadrature angular offset; sawtooth bias; signal spectrum; signal to noise ratio; Acoustic beams; Apertures; Delay effects; Delay estimation; Signal to noise ratio; Sonar detection; Switches; Teeth; Underwater tracking; Vectors;
fLanguage
English
Publisher
ieee
Conference_Titel
OCEANS 81
Conference_Location
Boston, MA
Type
conf
DOI
10.1109/OCEANS.1981.1151461
Filename
1151461
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