Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Pilot and Numeric Relaying

Pilot and Numeric Relaying

Pilot relaying is a type of differential protection used in power systems. It compares electrical quantities at the terminals of equipment via a communication channel instead of direct relay interconnection. This method is essential for transmission lines where the terminals are far apart, typically up to 80 km for lines with 69 to 115 kV ratings. Four types of communication channels are used for pilot relaying:

Uniform Depth Channel Flow: Problem Solving

Uniform Depth Channel Flow: Problem Solving

To calculate the flow rate for a trapezoidal channel, first, identify the bottom width, side slope, and flow depth of the channel. The cross-sectional area (A) corresponding to the depth of flow (y), channel bottom width (B), and side slope (θ) is determined by:Next, calculate the wetted perimeter, which includes the bottom width and the sloped side lengths in contact with the water. Using the values of the cross-sectional area and the wetted perimeter, determine the hydraulic radius by...

Linear Approximation in Frequency Domain

Linear Approximation in Frequency Domain

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....

Linear Approximation in Time Domain

Linear Approximation in Time Domain

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,...

Uniform Depth Channel Flow

Uniform Depth Channel Flow

Uniform depth channel flow keeps fluid depth consistent along channels such as irrigation canals. In natural channels, such as rivers, approximate uniform flow is often assumed. This condition occurs when the channel’s bottom slope matches the energy slope, balancing potential energy lost from gravity with head loss due to shear stress. This balance prevents depth changes along the channel length, resulting in a steady, uniform flow.Uniform flow in open channels with a constant cross-section...

Receiver Operating Characteristic Plot

Receiver Operating Characteristic Plot

A ROC (Receiver Operating Characteristic) plot is a graphical tool used to assess the performance of a binary classification model by illustrating the trade-off between sensitivity (true positive rate) and specificity (false positive rate). By plotting sensitivity against 1 - specificity across various threshold settings, the ROC curve shows how well the model distinguishes between classes, with a curve closer to the top-left corner indicating a more accurate model. The area under the ROC curve...

You might also read

Related Articles

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

Sort by

Same author

Evaluating the Forest Ecosystem through a Semi-Autonomous Quadruped Robot and a Hexacopter UAV.

Sensors (Basel, Switzerland)·2022

Same author

Multi-Class Cost-Constrained Random Coding for Correlated Sources over the Multiple-Access Channel.

Entropy (Basel, Switzerland)·2021

Same author

Robust Signaling for Bursty Interference.

Entropy (Basel, Switzerland)·2020

See all related articles

Search research articles

Related Experiment Video

Updated: Nov 27, 2025

Calibration of Vector Network Analyzer for Measurements in Radio Frequency Propagation Channels

Calibration of Vector Network Analyzer for Measurements in Radio Frequency Propagation Channels

Published on: June 2, 2020

Nearest Neighbor Decoding and Pilot-Aided Channel Estimation for Fading Channels.

A Taufiq Asyhari¹, Tobias Koch^2,3, Albert Guillén I Fàbregas^4,5,6

¹School of Computing and Digital Technology, Birmingham City University, Millennium Point, Birmingham B4 7XG, UK.

Entropy (Basel, Switzerland)

|December 8, 2020

Summary

This study analyzes information rates for noncoherent MIMO channels using pilot-aided estimation and nearest neighbor decoding. The findings reveal performance bounds, particularly the capacity pre-log, crucial for high signal-to-noise ratio (SNR) communication systems.

Keywords:

achievable rates fading high signal-to-noise ratio (SNR)mismatched decoding multiple antennas multiple-access channels nearest neighbor decoding noncoherent pilot-aided channel estimation

More Related Videos

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

Published on: June 25, 2021

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

Related Experiment Videos

Last Updated: Nov 27, 2025

Calibration of Vector Network Analyzer for Measurements in Radio Frequency Propagation Channels

Calibration of Vector Network Analyzer for Measurements in Radio Frequency Propagation Channels

Published on: June 2, 2020

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

Published on: June 25, 2021

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

Area of Science:

Wireless Communication
Information Theory
Signal Processing

Background:

Noncoherent, stationary, Gaussian, and MIMO flat-fading channels present unique challenges for information rate analysis.
Pilot-aided channel estimation and nearest neighbor decoding are key techniques for practical wireless systems.

Purpose of the Study:

To investigate achievable information rates in noncoherent MIMO flat-fading channels.
To analyze the capacity pre-log behavior in the high signal-to-noise ratio (SNR) limit.
To compare performance across different channel estimation and decoding schemes.

Main Methods:

Analysis of capacity pre-log for noncoherent MIMO channels.
Evaluation of pilot-aided channel estimation with nearest neighbor decoding.
Extension of analysis to fading multiple-access channels.

Main Results:

A scheme with pilot-aided estimation and nearest neighbor decoding achieves the capacity pre-log of noncoherent multiple-input single-output channels.
This scheme also approaches the best known lower bound for noncoherent MIMO channels.
Investigated relationships between antenna count and Doppler bandwidth in multiple-access scenarios.

Conclusions:

The proposed scheme offers significant performance gains in noncoherent MIMO systems, especially at high SNRs.
Understanding capacity pre-log is vital for optimizing wireless communication system design.
Fading multiple-access channels exhibit complex interactions between spatial and temporal diversity.