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

Carrier Generation and Recombination

Carrier Generation and Recombination

Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...

Design Example: Capacitance Multiplier Circuit

Design Example: Capacitance Multiplier Circuit

In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.

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:

Design Example

Design Example

The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...

Reducing Line Loss

Reducing Line Loss

In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss...

Mesh Analysis for AC Circuits

Mesh Analysis for AC Circuits

In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...

You might also read

Related Articles

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

Sort by

Same author

Predicting inmate suicidal behavior with an interpretable ensemble machine learning approach in smart prisons.

PeerJ. Computer science·2024

Same author

Exploring the Role of 6G Technology in Enhancing Quality of Experience for m-Health Multimedia Applications: A Comprehensive Survey.

Sensors (Basel, Switzerland)·2023

Same author

Enhancing System Performance through Objective Feature Scoring of Multiple Persons' Breathing Using Non-Contact RF Approach.

Sensors (Basel, Switzerland)·2023

Same author

WLAN RSS-Based Fingerprinting for Indoor Localization: A Machine Learning Inspired Bag-of-Features Approach.

Sensors (Basel, Switzerland)·2022

Same author

Contactless Small-Scale Movement Monitoring System Using Software Defined Radio for Early Diagnosis of COVID-19.

IEEE sensors journal·2022

Same author

An Efficient Multilevel Probabilistic Model for Abnormal Traffic Detection in Wireless Sensor Networks.

Sensors (Basel, Switzerland)·2022

Search research articles

Related Experiment Video

Updated: Aug 15, 2025

Transcription Start Site Mapping Using Super-low Input Carrier-CAGE

Transcription Start Site Mapping Using Super-low Input Carrier-CAGE

Published on: June 26, 2019

BER Reduction and Capacity Enhancement with Novel Guard Sequence Selection for Multi-Carrier Communication.

Oluwaseun Ologun¹, Shaochuan Wu¹, Raza Ali Shah²

¹Communications Research Center, School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001, China.

Sensors (Basel, Switzerland)

|January 8, 2023

Summary

This study introduces enhanced Orthogonal Frequency Division Multiplexing (eOFDM) by dynamically selecting guard intervals based on data symbols. This novel approach significantly improves bit error rate (BER) and system capacity in multicarrier communications.

Keywords:

OFDM cyclic prefix guard intervals known symbol padding zero padding

More Related Videos

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Published on: September 8, 2023

Author Spotlight: Enhancing CAR-T Cell Function in Syngeneic Tumor Models

Author Spotlight: Enhancing CAR-T Cell Function in Syngeneic Tumor Models

Published on: February 2, 2024

Related Experiment Videos

Last Updated: Aug 15, 2025

Transcription Start Site Mapping Using Super-low Input Carrier-CAGE

Transcription Start Site Mapping Using Super-low Input Carrier-CAGE

Published on: June 26, 2019

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Published on: September 8, 2023

Author Spotlight: Enhancing CAR-T Cell Function in Syngeneic Tumor Models

Author Spotlight: Enhancing CAR-T Cell Function in Syngeneic Tumor Models

Published on: February 2, 2024

Area of Science:

Electrical Engineering
Signal Processing
Telecommunications

Background:

Orthogonal frequency division multiplexing (OFDM) utilizes guard intervals like cyclic prefix (CP) and known symbol padding (KSP) for channel estimation and interference removal.
Existing OFDM schemes lack a direct relationship between guard intervals and data symbols, limiting performance optimization.

Purpose of the Study:

To develop a novel method for selecting guard intervals in OFDM based on data symbols.
To enhance the bit error rate (BER) and capacity of multicarrier systems through improved guard interval utilization.

Main Methods:

Proposing an enhanced OFDM (eOFDM) scheme that selects guard intervals dynamically based on data symbols from a subset of subcarriers.
Leveraging the high auto-correlation properties of the selected guard sequences to improve system performance.

Main Results:

The eOFDM scheme demonstrates significant improvements in bit error rate (BER) compared to existing OFDM techniques.
Enhanced capacity for the multicarrier system is achieved through the proposed method.

Conclusions:

The proposed eOFDM scheme effectively utilizes the relationship between guard intervals and data symbols.
Dynamic guard interval selection offers a promising approach for optimizing OFDM system performance, particularly in terms of BER and capacity.