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

Differential Relays01:20

Differential Relays

647
Differential relays are used to protect generators, buses, and transformers by comparing electrical quantities at different points. When a fault occurs, the difference in current between the two points triggers the relay to operate, opening the circuit breaker. Under normal conditions, the current entering (i1) and leaving (i2) a generator are equal. When a fault occurs, however, these currents become unequal, and the difference current flows in the relay operating coil, causing the relay to...
647
Transmission Line Design Considerations01:23

Transmission Line Design Considerations

542
Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
542
Line Protection with Impedance Relays01:27

Line Protection with Impedance Relays

384
Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
Under normal conditions, low load currents keep the measured...
384
Directional Relays01:25

Directional Relays

511
Directional relays, essential for managing unidirectional fault currents, enhance the safety and efficiency of power systems. On power lines equipped with directional relays, faults downstream (to the right) of the current transformer typically cause the fault current to lag the bus voltage by approximately 90 degrees, known as the forward direction. In contrast, upstream (left-side) faults may result in the fault current leading the bus voltage by nearly 90 degrees, termed the reverse...
511
Maximum Power Transfer01:16

Maximum Power Transfer

739
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
739
Overcurrent Relays01:26

Overcurrent Relays

438
Overcurrent relays, crucial for circuit protection, are connected to the secondary current of a current transformer. There are two primary types of overcurrent relays: instantaneous and time-delay.
Instantaneous overcurrent relays activate immediately when the input current exceeds a predetermined value, known as the pickup current, instantly energizing the circuit breaker trip coil. This rapid response is vital for addressing severe faults quickly.
Time-delay overcurrent relays, on the other...
438

You might also read

Related Articles

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

Sort by
Same author

Programmable meta-fluid antenna for spatial multiplexing in fast fluctuating radio channels.

Optics express·2025
Same author

Partitioning surface wave propagation on reconfigurable porous plane.

Scientific reports·2024
Same author

An Automated Contact Tracing Approach for Controlling Covid-19 Spread Based on Geolocation Data From Mobile Cellular Networks.

IEEE access : practical innovations, open solutions·2021
Same author

Signal Separation and Tracking Algorithm for Multi-Person Vital Signs by Using Doppler Radar.

IEEE transactions on biomedical circuits and systems·2020
Same journal

A smartphone-based zero-effort method for mitigating epidemic propagation.

EURASIP journal on advances in signal processing·2023
Same journal

Feature stability and setup minimization for EEG-EMG-enabled monitoring systems.

EURASIP journal on advances in signal processing·2022
Same journal

Classification of audio signals using spectrogram surfaces and extrinsic distortion measures.

EURASIP journal on advances in signal processing·2022
Same journal

A deep adversarial model for segmentation-assisted COVID-19 diagnosis using CT images.

EURASIP journal on advances in signal processing·2022
Same journal

A comparative study of multiple neural network for detection of COVID-19 on chest X-ray.

EURASIP journal on advances in signal processing·2021
Same journal

Introducing oriented Laplacian diffusion into a variational decomposition model.

EURASIP journal on advances in signal processing·2020
See all related articles

Related Experiment Video

Updated: Dec 25, 2025

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

8.7K

Joint source and relay optimization for interference MIMO relay networks.

Muhammad R A Khandaker1, Kai-Kit Wong1

  • 1Department of Electronic and Electrical Engineering, University College London, Torrington Place, London, WC1E 7JE UK.

EURASIP Journal on Advances in Signal Processing
|April 1, 2020
PubMed
Summary
This summary is machine-generated.

This study minimizes maximal mean-square error in multi-cellular MIMO relay systems using amplify-and-forward. Proposed alternating optimization and SDP solutions offer effective performance under power constraints.

Keywords:
InterferenceMIMOOptimizationRelayTwo-way

More Related Videos

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

10.2K
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

8.9K

Related Experiment Videos

Last Updated: Dec 25, 2025

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

8.7K
Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

10.2K
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

8.9K

Area of Science:

  • Wireless communication systems
  • Signal processing
  • Information theory

Background:

  • Multi-cellular systems face interference challenges.
  • Severe attenuation necessitates relay nodes for communication.
  • Multiple-Input Multiple-Output (MIMO) enhances spectral efficiency.

Purpose of the Study:

  • To minimize the maximal mean-square error (MSE) in multi-cellular MIMO relay systems.
  • To optimize source, relay, and receiver matrices under power constraints.
  • To develop efficient solutions for amplify-and-forward (AF) relaying.

Main Methods:

  • Alternating optimization of system matrices.
  • Development of a simplified semidefinite programming (SDP) solution.
  • Error covariance matrix decomposition technique.

Main Results:

  • Proposed alternating optimization effectively reduces MSE.
  • The SDP-based approach provides a computationally efficient solution.
  • Both one-way and two-way AF relaying mechanisms were analyzed.

Conclusions:

  • The proposed methods are effective for mitigating MSE in complex relay networks.
  • SDP offers a practical alternative to complex iterative optimization.
  • The research contributes to robust MIMO relay communication design.