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

Load-frequency control01:28

Load-frequency control

281
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
281
Power Factor Correction01:20

Power Factor Correction

282
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
282
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

331
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
331
Resonance in an AC Circuit01:26

Resonance in an AC Circuit

2.2K
The property of an inductor makes it resist any change in the current passing through it, while the property of a capacitor is to build up the charge across its terminals. Hence, if an inductor and capacitor are connected in series, they have opposite effects on the relative phase between current and voltage. The current through the circuit undergoes forced oscillation at the frequency of the source. The resistance term in an R-L-C circuit acts as a damping term because power is dissipated...
2.2K
Biasing of FET01:22

Biasing of FET

383
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
383
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

158
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
158

You might also read

Related Articles

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

Sort by
Same author

Toward Smarter Orthopedic Care: Classifying Plantar Footprints from RGB Images Using Vision Transformers and CNNs.

Journal of imaging·2025
Same author

Mindfulness-Based Intervention Effects on EEG and Executive Functions: A Systematic Review.

Brain sciences·2025
Same author

Field-Programmable Gate Array (FPGA)-Based Lock-In Amplifier System with Signal Enhancement: A Comprehensive Review on the Design for Advanced Measurement Applications.

Sensors (Basel, Switzerland)·2025
Same author

Enhancing Security of Telemedicine Data: A Multi-Scroll Chaotic System for ECG Signal Encryption and RF Transmission.

Entropy (Basel, Switzerland)·2024
Same author

Context-Aware Statistical Dead Reckoning for Localization in IoT Scenarios.

Sensors (Basel, Switzerland)·2023
Same author

A Comparison of Surrogate Behavioral Models for Power Amplifier Linearization under High Sparse Data.

Sensors (Basel, Switzerland)·2022

Related Experiment Video

Updated: Oct 3, 2025

Production and Optimization of LTE, a Leishmania tarentolae Derived Cell-Free Protein Expression System for Recombinant Protein Production
03:59

Production and Optimization of LTE, a Leishmania tarentolae Derived Cell-Free Protein Expression System for Recombinant Protein Production

Published on: November 8, 2024

1.2K

A Crest Factor Reduction Technique for LTE Signals with Target Relaxation in Power Amplifier Linearization.

José Ricardo Cárdenas-Valdez1, Jose Alejandro Galaviz-Aguilar2, Cesar Vargas-Rosales2

  • 1IT de Tijuana, Tecnológico Nacional de México, Tijuana 22435, Mexico.

Sensors (Basel, Switzerland)
|February 15, 2022
PubMed
Summary

This study introduces a novel crest factor reduction (CFR) algorithm to improve radio-frequency (RF) power amplifier performance by mitigating high peak-to-average power ratio (PAPR) issues in orthogonal frequency division multiplexing (OFDM) systems.

Keywords:
FPGALTEPAPRcrest factor reductionpower amplifier

More Related Videos

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

6.3K
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

11.5K

Related Experiment Videos

Last Updated: Oct 3, 2025

Production and Optimization of LTE, a Leishmania tarentolae Derived Cell-Free Protein Expression System for Recombinant Protein Production
03:59

Production and Optimization of LTE, a Leishmania tarentolae Derived Cell-Free Protein Expression System for Recombinant Protein Production

Published on: November 8, 2024

1.2K
Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

6.3K
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

11.5K

Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Wireless Communications

Background:

  • Precise baseband models are crucial for effective signal conditioning in radio-frequency (RF) transceiver systems.
  • High peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) waveforms poses challenges for amplifiers, leading to clipping and distortion.
  • Existing methods require careful power limitation, impacting amplifier efficiency and signal integrity.

Purpose of the Study:

  • To develop and demonstrate a framework for modeling signal conditioning performance with support for OFDM waveforms.
  • To introduce an alternative joint crest factor reduction (CFR) algorithm for mitigating high PAPR.
  • To validate the effectiveness of the CFR algorithm in practical applications and characterize amplifier behavior.

Main Methods:

  • A real-time field-programmable gate array (FPGA) testbed was developed for characterization and measurement.
  • A single-carrier 64-QAM OFDM signal based on LTE downlink at 2.40 GHz was used as the stimulus.
  • The joint CFR algorithm was applied to correct high PAPR and its impact on amplifier performance was analyzed.

Main Results:

  • The developed CFR algorithm demonstrated reliable clipping reduction, producing a smoother signal.
  • The algorithm effectively corrected unwanted out-of-band emissions, validated by adjacent channel power ratio (ACPR) measurements.
  • Key performance metrics including PAPR, peak power, complementary cumulative distribution function (CCDF), and error vector magnitude (EVM) were analyzed.

Conclusions:

  • The joint CFR algorithm offers an effective solution for improving signal conditioning and amplifier performance in OFDM systems.
  • The developed FPGA testbed provides a valuable tool for characterizing and measuring RF amplifier behavior under signal conditioning restrictions.
  • The findings contribute to more efficient and reliable wireless communication systems by addressing PAPR challenges.