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

Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

465
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
465
The Midpoint Formula01:24

The Midpoint Formula

623
In coordinate geometry, determining the central point between two locations is common. This central point, or midpoint, lies exactly halfway along the line segment connecting two points in a two-dimensional space. It has applications in mathematics, physics, engineering, and various planning disciplines.Given two points labeled as A (x1, y1) and B (x2, y2) on a coordinate plane, a straight line segment can be plotted between them. The midpoint, labeled point M, divides this segment into two...
623
Distance Measurements by Taping01:18

Distance Measurements by Taping

418
Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
418
The Law of Sines01:29

The Law of Sines

306
Solving oblique triangles—those without right angles—relies on specific trigonometric relationships, most notably the Law of Sines. This is because, unlike right triangles, where the Pythagorean theorem can be used to relate side lengths, oblique triangles lack a 90-degree angle and therefore require a different approach. The Pythagorean theorem is only valid for right-angled triangles, making it unsuitable for solving non-right triangles. In such cases, the Law of Sines becomes...
306

You might also read

Related Articles

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

Sort by
Same author

Cooperative Design of Ranging and Communication for In-Band Full-Duplex Inter-Satellite Links.

Sensors (Basel, Switzerland)·2026
Same author

Efficient Topology Design for LEO Mega-Constellation Using Topological Structure Units with Heterogeneous ISLs.

Sensors (Basel, Switzerland)·2025
Same author

Group Target Tracking for Highly Maneuverable Unmanned Aerial Vehicles Swarms: A Perspective.

Sensors (Basel, Switzerland)·2023
Same author

Tripeptide and hexapeptide topical as adjunct to nonablative fractional resurfacing for photodamage: A randomized split-face trial.

Journal of cosmetic dermatology·2020
Same author

Rare case of a basal cell carcinoma with intravascular invasion.

International journal of women's dermatology·2020
Same author

The Complete Genome Sequence of a Bacterial Strain with High Alkalic Xylanase Activity Isolated from the Sludge Near a Papermill.

Current microbiology·2020

Related Experiment Video

Updated: Jan 17, 2026

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
09:36

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

Published on: June 25, 2021

3.5K

A New Measurement Method for BDS Inter-Satellite Link Based on Co-Frequency Co-Time Full Duplex System.

Hao Feng1,2, Zhuo Yang1,2, Hong Ma2

  • 1Graduate School, Space Engineering University, Beijing 101416, China.

Sensors (Basel, Switzerland)
|September 19, 2025
PubMed
Summary

This study introduces a Co-frequency Co-time Full Duplex (CCFD) system for BeiDou-3 satellites, significantly improving ranging accuracy and transmission efficiency over traditional methods. The new CCFD system achieves centimeter-level precision, enhancing satellite navigation performance.

Keywords:
BeiDou-3Co-frequency Co-time Full Duplex (CCFD)inter-satellite linkranging accuracytwo-way measurement

More Related Videos

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

9.8K
Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

11.3K

Related Experiment Videos

Last Updated: Jan 17, 2026

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
09:36

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

Published on: June 25, 2021

3.5K
Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

9.8K
Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

11.3K

Area of Science:

  • Satellite Navigation Systems
  • Radio Frequency Engineering
  • Signal Processing

Background:

  • BeiDou-3 inter-satellite links require high-precision ranging and large-capacity transmission.
  • Traditional Time-Division Half-Duplex (TDHD) systems face limitations in accuracy, efficiency, and link establishment.

Purpose of the Study:

  • To propose and validate a novel two-way measurement method using Co-frequency Co-time Full Duplex (CCFD) for BeiDou-3 inter-satellite links.
  • To enhance ranging accuracy and transmission efficiency compared to existing TDHD systems.

Main Methods:

  • Developed a dynamic link constraint model based on BeiDou-3 constellation configuration.
  • Conducted a comprehensive link budget analysis for inter-satellite measurements.
  • Derived the principles, system model, and error analysis for CCFD two-way measurement.

Main Results:

  • CCFD system demonstrated feasibility and significant ranging accuracy improvements.
  • Achieved 1.9 cm accuracy (51.3% enhancement) at 61.6 dBHz, surpassing TDHD's 3.9 cm.
  • Further improved to 0.8 cm accuracy (66.8% enhancement) at 69.3 dBHz, outperforming TDHD's 2.2 cm.

Conclusions:

  • The proposed CCFD technology substantially enhances BeiDou-3 satellite navigation system performance.
  • CCFD offers a promising solution for future high-precision satellite communication and ranging applications.