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

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

1.7K
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
1.7K
Upsampling01:22

Upsampling

573
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
573
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

690
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...
690
Design Example01:23

Design Example

525
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...
525
Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

679
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
679

You might also read

Related Articles

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

Sort by
Same author

Detection of Anomalies in Daily Activities Using Data from Smart Meters.

Sensors (Basel, Switzerland)·2024
Same author

Simulation Tool and Online Demonstrator for CDMA-Based Ultrasonic Indoor Localization Systems.

Sensors (Basel, Switzerland)·2022
Same author

Dynamic Adjustment of Weighted GCC-PHAT for Position Estimation in an Ultrasonic Local Positioning System.

Sensors (Basel, Switzerland)·2021
Same author

Using Perspective-n-Point Algorithms for a Local Positioning System Based on LEDs and a QADA Receiver.

Sensors (Basel, Switzerland)·2021
Same author

LOCATE-US: Indoor Positioning for Mobile Devices Using Encoded Ultrasonic Signals, Inertial Sensors and Graph-Matching.

Sensors (Basel, Switzerland)·2021
Same author

Feature Extraction for Track Section Status Classification Based on UGW Signals.

Sensors (Basel, Switzerland)·2018
Same journal

RETRACTED: Zhang et al. A Novel Framework for Reconstruction and Imaging of Target Scattering Centers via Wide-Angle Incidence in Radar Networks. <i>Sensors</i> 2025, <i>25</i>, 6802.

Sensors (Basel, Switzerland)·2026
Same journal

Enhancing Unsupervised Multi-Source Domain Adaptation for Person Re-Identification via Mixture of Experts and Graph-Based Relation.

Sensors (Basel, Switzerland)·2026
Same journal

Development of an Instrumented Glove for Palmar Pressure Assessment in Kayakers.

Sensors (Basel, Switzerland)·2026
Same journal

Development and Experimental Validation of an Autonomous IoT-Based Monitoring System for Real-Time Water Quality Assessment in the Amazon River.

Sensors (Basel, Switzerland)·2026
Same journal

Semi-Supervised Adversarial Learning Framework for Controller Area Network Bus Intrusion Detection.

Sensors (Basel, Switzerland)·2026
Same journal

Smart Optimization Method for Safety Signs in Innovative Manufacturing Environments Integrating Industrial Field IoT Sensors and Knowledge Graphs.

Sensors (Basel, Switzerland)·2026
See all related articles

Related Experiment Video

Updated: Jan 13, 2026

Wideband Optical Detector of Ultrasound for Medical Imaging Applications
08:21

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

11.7K

Novel Filter-Based Excitation Method for Pulse Compression in Ultrasonic Sensory Systems.

Álvaro Cortés1, María Carmen Pérez-Rubio1, Álvaro Hernández1

  • 1Department of Electronics, Polytechnic School, University of Alcalá, 28805 Alcalá de Henares, Madrid, Spain.

Sensors (Basel, Switzerland)
|January 10, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a new ultrasonic positioning method that enhances indoor location accuracy and extends range. The novel narrowband approach offers superior performance in distance, precision, and signal robustness compared to traditional wideband systems.

Keywords:
encoding techniquesmulti-carrier modulationultrasonic sensory systems

More Related Videos

Multiplexing Focused Ultrasound Stimulation with Fluorescence Microscopy
08:39

Multiplexing Focused Ultrasound Stimulation with Fluorescence Microscopy

Published on: January 7, 2019

8.6K
Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
06:51

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

7.4K

Related Experiment Videos

Last Updated: Jan 13, 2026

Wideband Optical Detector of Ultrasound for Medical Imaging Applications
08:21

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

11.7K
Multiplexing Focused Ultrasound Stimulation with Fluorescence Microscopy
08:39

Multiplexing Focused Ultrasound Stimulation with Fluorescence Microscopy

Published on: January 7, 2019

8.6K
Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
06:51

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

7.4K

Area of Science:

  • Engineering
  • Signal Processing
  • Indoor Positioning Systems

Background:

  • Global Navigation Satellite Systems (GNSSs) are effective outdoors, but indoor positioning remains a challenge.
  • Existing ultrasonic indoor positioning systems have limited coverage and are susceptible to Doppler effects and bandwidth constraints.
  • Accurate indoor positioning is crucial for location-based services (LBSs) and the Internet of Things (IoT).

Purpose of the Study:

  • To propose a novel excitation and processing method for ultrasonic positioning systems to improve transmission capabilities and accuracy.
  • To enhance the performance of ultrasonic indoor positioning, overcoming limitations of existing systems.
  • To optimize ultrasonic signal transmission and reception for better real-time position estimation.

Main Methods:

  • A superheterodyne approach enabling simultaneous multi-channel signal transmission and reception.
  • Adaptation of signal bandwidths and central frequencies to transducer characteristics.
  • Utilization of binary spread spectrum sequences within a multicarrier modulation framework.
  • Processing of received ultrasonic signals using filter banks and matched filtering to determine Time Differences of Arrival (TDoA).

Main Results:

  • The proposed narrowband ultrasonic scheme reliably operates at distances up to 40 m, exceeding conventional wideband limits (34 m).
  • Ranging errors are below 3 cm at 40 m, significantly better than wideband schemes (over 8 cm).
  • The narrowband scheme maintains stable operation at SNR as low as -32 dB, compared to -17 dB for wideband systems.

Conclusions:

  • The novel narrowband ultrasonic positioning method significantly improves transmission capabilities, range, and accuracy.
  • The system demonstrates superior performance in terms of ranging distance, error, and signal-to-noise ratio (SNR) compared to classical wideband approaches.
  • The proposed method offers a robust and efficient solution for indoor positioning challenges, validated through digital twin modeling and experimental tests.