Unequal “directivity orders” between two figure-8 directional microphones/hydrophones are proposed and analyzed in this article for beamforming. Specifically, two figure-8 sensors here, possibly of different “directivity orders”, are orthogonally oriented (to facilitate spatial filtering in both the azimuth and the elevation) and spatially colocated with an isotropic sensor (thereby decoupling the incident source's azimuth-elevation-radial dimensions from the impinging signal's time-frequency dimensions). This versatility (in the sensors' diverse “directivity orders”) contrasts with all prior open literature on beamforming using a colocated triad of possibly directional sensors. Instead, this article analytically explores how unequal directivity orders between two perpendicularly colocated figure-8 acoustic sensors would affect the triad array's “spatial matched filter” beam steering. The resulting “action-able” insights show which directivity-order combinations allow the beam of full maneuverability toward any azimuthal direction, and which directivity-order combinations only partial maneuverability.
Unequal Directivity Orders Between Two Figure-8 Sensors Perpendicularly Colocated With a Pressure Sensor – Their “Spatial Matched Filter” Beam Steering
IEEE Transactions on Aerospace and Electronic Systems ; 60 , 6 ; 7575-7594
01.12.2024
3175355 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Detection and Range-Doppler Estimation for Colocated Sensors
Online Contents | 1997
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