Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Area Computation by the Alternative Coordinate Method01:24

Area Computation by the Alternative Coordinate Method

177
The alternative coordinate method, also known as the Shoelace Formula, is a technique for determining the area of a traverse using Cartesian coordinates. This method relies on the sequential arrangement of x and y coordinates for each point of the shape, ensuring accuracy and ease of application.In this approach, each corner's x and y coordinates are listed as fractions, with the x-coordinate as the numerator and the y-coordinate as the denominator. These coordinates are arranged sequentially...
177
Curvilinear Motion: Rectangular Components01:23

Curvilinear Motion: Rectangular Components

666
Curvilinear motion characterizes the movement of a particle or object along a curved path, notably evident when envisioning a car navigating a winding road. If the car starts at point A, its position vector is established within a fixed frame of reference, where the ratio of the position vector to its magnitude signifies the unit vector pointing in the position vector's direction.
As the car advances, its position evolves over time. Quantifying the car's velocity involves computing the...
666
Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

373
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
373
Vector Algebra: Method of Components01:08

Vector Algebra: Method of Components

15.9K
It is cumbersome to find the magnitudes of vectors using the parallelogram rule or using the graphical method to perform mathematical operations like addition, subtraction, and multiplication. There are two ways to circumvent this algebraic complexity. One way is to draw the vectors to scale, as in navigation, and read approximate vector lengths and angles (directions) from the graphs. The other way is to use the method of components.
In many applications, the magnitudes and directions of...
15.9K
Linear Approximation in Frequency Domain01:26

Linear Approximation in Frequency Domain

143
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
143
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

456
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
456

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Effects and mechanism of carrier-free self-assembled nanoparticles of natural products in attenuating pulmonary edema.

Journal of nanobiotechnology·2026
Same author

A One-Pot CRISPR-Cas12b Assay for Rapid Detection of Human Adenovirus Serotypes 3 and 7.

Journal of medical virology·2026
Same author

Novel bismuth sulfhalide photocatalysts: from structural design to energy and environmental applications.

Nanoscale·2026
Same author

A multienzyme-mimicking nanoplatform induces disulfidptosis/cuproptosis/apoptosis for tumor therapy.

National science review·2026
Same author

Graph Neural Network-Assisted Machine Learning for High-Throughput Buried Interfacial Materials Screening in Antisolvent-Free Perovskite Solar Cells.

ACS applied materials & interfaces·2026
Same author

Enhanced nitrogen and phosphorus removal from mining-affected waters by micro-nano aeration coupled with microbial remediation.

Environmental technology·2026

Related Experiment Video

Updated: Sep 21, 2025

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
06:14

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

5.0K

Covariance matrix reconstruction method based on amplitude and phase constraints with application to extend array

Guangpu Zhang1, Kaixin Liu1, Jin Fu2

  • 1Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China.

The Journal of the Acoustical Society of America
|June 1, 2022
PubMed
Summary

This study introduces an array aperture extension method to enhance underwater direction of arrival (DOA) estimation. The technique improves resolution and precision when the number of array elements is limited.

More Related Videos

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

9.9K
Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.6K

Related Experiment Videos

Last Updated: Sep 21, 2025

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
06:14

Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

Published on: July 30, 2020

5.0K
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

9.9K
Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
06:25

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

8.6K

Area of Science:

  • Acoustics
  • Signal Processing
  • Array Signal Processing

Background:

  • Angular resolution is a critical challenge in underwater direction of arrival (DOA) estimation.
  • Decreasing array aperture degrades the resolution of uniform linear arrays.
  • Increasing the number of array elements (NAE) improves resolution but is often impractical.

Purpose of the Study:

  • To propose an array aperture extension method for improving underwater DOA estimation.
  • To enhance DOA estimation performance, including precision and dual-target resolution probability, when NAE is insufficient.

Main Methods:

  • An optimization algorithm is designed to reconstruct the extended array's covariance matrix from the original array's covariance matrix.
  • The reconstructed covariance matrix is constrained with a pure signal covariance matrix to ensure realism.
  • Virtual array elements are increased without altering element spacing.

Main Results:

  • The proposed method effectively extends the array aperture, increasing virtual array elements.
  • Simulations and real lake experiments validate the method's effectiveness.
  • Improved DOA estimation precision and resolution probability for dual targets were observed.

Conclusions:

  • The array aperture extension method successfully addresses limitations in NAE for underwater DOA estimation.
  • This technique offers a practical solution for enhancing DOA estimation performance in challenging underwater environments.