A Triad of Cardioid Sensors in Orthogonal Orientation and Spatial Collocation—Its Spatial-Matched-Filter-Type Beam-Pattern

  title={A Triad of Cardioid Sensors in Orthogonal Orientation and Spatial Collocation—Its Spatial-Matched-Filter-Type Beam-Pattern},
  author={Kainam Thomas Wong and Chibuzo Joseph Nnonyelu and Yue Ivan Wu},
  journal={IEEE Transactions on Signal Processing},
This paper proposes a new configuration of acoustic sensors—the collocation of three cardioid sensors in perpendicular orientation, in order to increase the mainlobe-to-sidelobe height ratio (possibly to <inline-formula> <tex-math notation="LaTeX">$\infty$</tex-math></inline-formula>). This paper will analyze such a proposed triad's “spatial matched filter” beam-pattern that is independent of the frequency/spectrum of the incident signals. Specifically, this paper will analytically derive the… 
An array of directional sensors (cardioid sensors or figure-8 sensors), diversely orientated but spatially collocated : their beam-patterns
This dissertation contains four related investigations: 1. A Triad of Cardioid Sensors in Orthogonal Orientation and Spatial Collocation – Its Spatial-Matched-Filter-Type Beam-Pattern: This work
Hybrid Cramér-Rao bound of direction finding, using a triad of cardioid sensors that are perpendicularly oriented and spatially collocated.
This analysis allows the cardioidicity index to be stochastically uncertain, applies to any cardioidic order (k), and is valid for any real-valued incident signal regardless of the signal's time-frequency structure.
On the Performance of L- and V-Shaped Arrays of Cardioid Microphones for Direction Finding
The L-shaped and V-shaped arrays of first-order cardioid microphones for direction finding are presented in this paper. A comparative study of the direction of arrival estimation performance of the
A higher-order "figure-8" sensor and an isotropic sensor-For azimuth-elevation bivariate direction finding.
Close-form eigen-based signal-processing algorithms for azimuth-elevation direction finding are developed and the proposed direction-of-arrival estimators' efficacy and closeness to the respective Cramér-Rao lower bounds are verified.
Aperture Maximization with Half-Wavelength Spacing, via a 2-Circle Concentric Array Geometry that is Uniform but Sparse
This paper proposes a new sensor-array geometry (the 2-circle concentric array geometry), that maximizes the array's spatial aperture mainly for bivariate azimuth-polar resolution of


Acoustic Near-Field Source-Localization by Two Passive Anchor-Nodes
  • Y. Wu, K. T. Wong
  • Physics
    IEEE Transactions on Aerospace and Electronic Systems
  • 2012
A new scheme is herein proposed to localize an acoustic source, which blends the "received signal strength indication" approach of geolocation, and the acoustic vector-sensor (AVS) based direction-finding (DF).
A directionally tunable but frequency-invariant beamformer on an acoustic velocity-sensor triad to enhance speech perception.
Herein investigated are computationally simple microphone-array beamformers that are independent of the frequency-spectra of all signals, all interference, and all noises. These beamformers allow the
A Vertical Array Of Directional Acoustic Sensors
A vertical line array of sixteen low-frequency DIFAR (DIrectional Frequency Analysis and Recording) sensors has been designed and constructed, and was deployed from the R/P FLIP during an engineering
CramÉr-Rao Bounds for Direction Finding by an Acoustic Vector Sensor Under Nonideal Gain-Phase Responses, Noncollocation, or Nonorthogonal Orientation
An acoustic vector-sensor (also known as vector-hydrophone in underwater applications) is composed of two or three spatially collocated but orthogonally oriented acoustic velocity sensors, plus
Sidelobe Evaluation of Cardioid-Patterned Sensor Array
Due to the widespread use of sensor arrays, a great variety of design techniques have been developed, adjusting the excitation of the sensors and/or their positions. It has been observed that most of
Directivity factors for linear arrays of velocity sensors
Some of the features unique to beamforming a linear array of acoustic velocity sensors, which are not present with scalar-sensing elements (such as conventional pressure sensors), are described in
On the potential of fixed arrays for hearing aids.
Free-field arrays of head-sized extents were studied, characterized by the broadband intelligibility-weighted directivity and noise sensitivity (reflecting the array's sensitivity to uncorrelated noise, as well as device tolerances) and the complexity and robustness of the required processing.
Unambiguous triplet array beamforming and calibration algorithms to facilitate an environmentally adaptive active sonar concept
Cardioid or triplet towed arrays are utilized in sonar applications to resolve left/right ambiguity by placing a null on the ambiguous direction. This leaves an uncalibrated residual signal on the
Closed-form underwater acoustic direction-finding with arbitrarily spaced vector hydrophones at unknown locations
This paper introduces a novel ESPRIT-based closed form source localization algorithm applicable to arbitrarily spaced three-dimensional arrays of vector hydrophones, whose locations need not be
Adaptive port-starboard beamforming of triplet sonar arrays
For a low-frequency active sonar (LFAS) with a triplet receiver array, it is not clear in advance which signal processing techniques optimize its performance. Here, several advanced beamformers are