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

Linear Approximation in Time Domain01:21

Linear Approximation in Time Domain

53
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
53
Linear Approximation in Frequency Domain01:26

Linear Approximation in Frequency Domain

79
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....
79
Area Computation by the Alternative Coordinate Method01:24

Area Computation by the Alternative Coordinate Method

29
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...
29
Even and Odd Signals01:17

Even and Odd Signals

611
An even signal, whether in continuous-time or discrete-time, is defined by its symmetry with its time-reversed version. Mathematically, this is represented as
611
Discrete-Time Fourier Series01:20

Discrete-Time Fourier Series

179
The Discrete-Time Fourier Series (DTFS) is a fundamental concept in signal processing, serving as the discrete-time counterpart to the continuous-time Fourier series. It allows for the representation and analysis of discrete-time periodic signals in terms of their frequency components. Unlike its continuous counterpart, which utilizes integrals, the calculation of DTFS expansion coefficients involves summations due to the discrete nature of the signal.
For a discrete-time periodic signal x[n]...
179
Aliasing01:18

Aliasing

100
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
100

You might also read

Related Articles

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

Sort by
Same author

An injectable tough hydrogel sealant enabling rapid hemostasis and promoting oral tissue regeneration.

Bioactive materials·2026
Same author

Immunomodulatory Hydrogel Coupling Pyroptosis Amplification With T-Cell Modulation to Block Postoperative Tumor Recurrence.

Advanced healthcare materials·2026
Same author

A self-healing injectable PF127-gelatin bioadhesive sealant with antioxidant and antibacterial activities for accelerated oral ulcer repair.

Journal of materials chemistry. B·2026
Same author

MDF2Former: Multi-Scale Dual-Domain Feature Fusion Transformer for Hyperspectral Image Classification of Bacteria in Murine Wounds.

Journal of imaging·2026
Same author

Physiological Mechanical Loading Is Crucial for Chondrogenesis and Cartilage Formation by Human Synovium-Derived Stem Cells Stimulated by Kartogenin.

ACS biomaterials science & engineering·2026
Same author

Bubble Evolution-Guided Interconnected Hierarchical Macroporous Sponges for Non-Compressible Hemostasis in Preclinical Models.

Advanced materials (Deerfield Beach, Fla.)·2026
Same journal

Turbulent flow in a vortex separator with a directed pipe inlet.

Scientific reports·2026
Same journal

Systematic characteristic evaluation of clay-based cementitious material derived from calcium carbide residue and waste tile powder.

Scientific reports·2026
Same journal

Retraction Note: Improvement of a rapid diagnostic application of monoclonal antibodies against avian influenza H7 subtype virus using Europium nanoparticles.

Scientific reports·2026
Same journal

Applying large language models to spam detection in the Kazakh low-resource language setting.

Scientific reports·2026
Same journal

An open-source 3D printing system enabling in-situ freeze-thaw processing of hydrogels.

Scientific reports·2026
Same journal

An enhanced EfficientNet framework for automated waste classification using cosine annealing and label smoothing.

Scientific reports·2026
See all related articles

Related Experiment Video

Updated: May 8, 2025

Automated Analysis of Dynamic Ca2+ Signals in Image Sequences
06:49

Automated Analysis of Dynamic Ca2+ Signals in Image Sequences

Published on: June 16, 2014

17.0K

DOA estimation algorithm for non-circular signal by a large-spacing array with auxiliary element.

Sheng Liu1, Jing Zhao2, Decheng Wu3

  • 1School of Data, Tongren University, 238 Qihang Road, Tongren, 554300, Guizhou, China.

Scientific Reports
|December 27, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a novel direction of arrival (DOA) estimation algorithm using a large-spacing array and an auxiliary element. The new method enhances accuracy and robustness for non-circular signals compared to traditional techniques.

Keywords:
Auxiliary elementDOA estimationLarge-spacing arrayMutual couplingNon-circular signal

More Related Videos

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

4.8K
Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
11:54

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

9.2K

Related Experiment Videos

Last Updated: May 8, 2025

Automated Analysis of Dynamic Ca2+ Signals in Image Sequences
06:49

Automated Analysis of Dynamic Ca2+ Signals in Image Sequences

Published on: June 16, 2014

17.0K
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

4.8K
Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
11:54

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

9.2K

Area of Science:

  • Signal Processing
  • Array Signal Processing
  • Electromagnetics

Background:

  • Direction of Arrival (DOA) estimation is crucial for various applications.
  • Traditional algorithms face limitations with non-circular signals and large element spacing.
  • Mutual coupling can degrade the performance of uniform linear arrays.

Purpose of the Study:

  • To develop a robust DOA estimation algorithm for non-circular signals.
  • To overcome the limitations of half-wavelength spacing constraints in array antennas.
  • To improve accuracy and robustness against mutual coupling in DOA estimation.

Main Methods:

  • Utilizing a large-spacing uniform array with an auxiliary element.
  • Employing eigenvalue decomposition (EVD) to obtain initial signal subspaces.
  • Expanding virtual signal subspaces and forming a high-dimensional subspace.
  • Applying the Estimation of Signal Parameters via Rotational Invariance Techniques (ESPRIT) algorithm.

Main Results:

  • The proposed algorithm achieves higher accuracy in DOA estimation.
  • Demonstrates enhanced robustness against mutual coupling effects.
  • Effectively handles non-circular signals with large element spacing.

Conclusions:

  • The novel DOA estimation algorithm offers significant advantages over traditional ESPRIT and NC-ESPRIT.
  • The method provides a more accurate and reliable solution for array signal processing.
  • This approach is particularly beneficial for scenarios with non-circular signals and hardware constraints.