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

Field Application of Global Positioning System01:28

Field Application of Global Positioning System

136
The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
136
Distance Measurements by Taping01:18

Distance Measurements by Taping

160
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...
160
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

155
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
155
Weighted Mean00:57

Weighted Mean

5.8K
While taking the arithmetic, geometric, or harmonic mean of a sample data set, equal importance is assigned to all the data points. However, all the values may not always be equally important in some data sets. An intrinsic bias might make it more important to give more weightage to specific values over others.
For example, consider the number of goals scored in the matches of a tournament. While computing the average number of goals scored in the tournament, it may be more important to...
5.8K
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

206
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
206
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

169
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...
169

You might also read

Related Articles

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

Sort by
Same author

Graph Optimization Model Fusing BLE Ranging with Wi-Fi Fingerprint for Indoor Positioning.

Sensors (Basel, Switzerland)·2022
Same author

VDAC2 interacts with PFKP to regulate glucose metabolism and phenotypic reprogramming of glioma stem cells.

Cell death & disease·2018
Same author

Genome-Wide Association Studies of 39 Seed Yield-Related Traits in Sesame (<i>Sesamum indicum</i> L.).

International journal of molecular sciences·2018
Same author

Effects of Dapagliflozin on 24-Hour Glycemic Control in Patients with Type 2 Diabetes: A Randomized Controlled Trial.

Diabetes technology & therapeutics·2018
Same author

Copper(II)-Catalyzed Four-Component Oxysulfonylation/Diazenylation: Synthesis of α-Arylhydrazo-β-keto Sulfones.

The Journal of organic chemistry·2018
Same author

Early embryonic exposure of ionizing radiations disrupts zebrafish pigmentation.

Journal of cellular physiology·2018

Related Experiment Video

Updated: Oct 20, 2025

Author Spotlight: UAV Remote Sensing for Efficient Invasive Plant Biomass Estimation
08:47

Author Spotlight: UAV Remote Sensing for Efficient Invasive Plant Biomass Estimation

Published on: February 9, 2024

1.7K

An RSS Transform-Based WKNN for Indoor Positioning.

Rong Zhou1, Yexi Yang1, Puchun Chen1

  • 1School of Control and Computer Engineering, North China Electric Power University, Beijing 102206, China.

Sensors (Basel, Switzerland)
|September 10, 2021
PubMed
Summary

A new Q-WKNN algorithm enhances Wi-Fi fingerprint indoor positioning by transforming received signal strength (RSS) to reduce fluctuations. This improves accuracy and real-time performance, especially in changing environments with fixed access points.

Keywords:
AP selectionRSS fluctuationWKNNWi-Fi fingerprint

More Related Videos

Photorealistic Learned Landscapes for Augmented Reality
06:54

Photorealistic Learned Landscapes for Augmented Reality

Published on: June 27, 2025

309
Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults
04:13

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults

Published on: February 8, 2019

6.9K

Related Experiment Videos

Last Updated: Oct 20, 2025

Author Spotlight: UAV Remote Sensing for Efficient Invasive Plant Biomass Estimation
08:47

Author Spotlight: UAV Remote Sensing for Efficient Invasive Plant Biomass Estimation

Published on: February 9, 2024

1.7K
Photorealistic Learned Landscapes for Augmented Reality
06:54

Photorealistic Learned Landscapes for Augmented Reality

Published on: June 27, 2025

309
Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults
04:13

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults

Published on: February 8, 2019

6.9K

Area of Science:

  • Computer Science
  • Electrical Engineering
  • Signal Processing

Background:

  • Wi-Fi fingerprint-based indoor positioning systems face challenges with received signal strength (RSS) fluctuations.
  • These fluctuations stem from variations in acquisition equipment, time, and environmental conditions, impacting positioning accuracy and real-time performance.

Purpose of the Study:

  • To propose a novel Q-WKNN algorithm for improved Wi-Fi indoor positioning accuracy and real-time capabilities.
  • To address RSS fluctuation issues in indoor positioning systems.

Main Methods:

  • Introduced a base Q transformation to convert RSS to Q-based RSS, smoothing signal fluctuations based on the RSS-distance relationship.
  • Developed a Q-WKNN similarity matrix by selecting relevant access points (APs) to reduce positioning time.
  • Employed adaptive K for test point (TP) position estimation.

Main Results:

  • Q-WKNN demonstrated superior positioning accuracy and real-time performance compared to existing algorithms like WKNN, M-WKNN, GK, and LS-SVM.
  • Evaluations were conducted on Zenodo and underground parking databases, validating the algorithm's effectiveness.

Conclusions:

  • The Q-WKNN algorithm offers significant improvements in indoor positioning accuracy and real-time performance.
  • Q-WKNN is particularly suitable for environments with dynamic changes and stable access point configurations.