IEEE 802.15. 4 ZigBee-based time-of-arrival estimation for wireless sensor networks
J Cheon, H Hwang, D Kim, Y Jung - Sensors, 2016 - mdpi.com
Precise time-of-arrival (TOA) estimation is one of the most important techniques in RF-based
positioning systems that use wireless sensor networks (WSNs). Because the accuracy of …
positioning systems that use wireless sensor networks (WSNs). Because the accuracy of …
Synch-free RF time-of-flight measurement system for wireless sensor networks based on vernier effect
S Ko, G Aikawa, J Takayama… - Proceedings of SICE …, 2010 - ieeexplore.ieee.org
This paper proposes a synch-free RF Time-of-Flight (ToF) measurement system as an epoch-
making protocol of RF ToF ranging for wireless sensor networks (WSNs). This system is …
making protocol of RF ToF ranging for wireless sensor networks (WSNs). This system is …
A short range measurement using RF signal's propagation time based on vernier effect
S Ko, J Takayama, S Ohyama - 2009 ICCAS-SICE, 2009 - ieeexplore.ieee.org
To recognize the position of moving objects, facilities or important equipments has been
regarded as a hot issue in the future environment which needs ubiquitous characteristics …
regarded as a hot issue in the future environment which needs ubiquitous characteristics …
Enhancing Direction Finding Accuracy In Perturbed Digital Arrays Via RF Ranging-Based Self Calibration
A Freiman - 2024 - digitalcommons.calpoly.edu
Direction finding with radio-frequency (RF) waves have numerous applications in radio
navigation, wireless localization, emergency aid, and air traffic control, among others …
navigation, wireless localization, emergency aid, and air traffic control, among others …
Proposal of generalized vernier effect and its practical advantage for RF time-of-flight ranging between sensor nodes in wireless sensor networks
S Ko, J Takayama, S Ohyama - Sensors and Actuators A: Physical, 2011 - Elsevier
Accurate ranging technique is indispensable for node localization in wireless sensor
networks (WSNs), and there are various ranging techniques/systems using physical …
networks (WSNs), and there are various ranging techniques/systems using physical …
Wireless sensor networks nodes localization based on inter-node RF range measurement using Vernier effect
AH Alasiry, S Ko, HP Thanh… - 2011 International …, 2011 - ieeexplore.ieee.org
Various method of inter-node range measurement has been used in wireless sensor
networks (WSNs) for node range-based localization. Radio frequency (RF) based time-of …
networks (WSNs) for node range-based localization. Radio frequency (RF) based time-of …
Filter bank transceiver design for ultra wideband
Ultra Wideband (UWB) communications are steadily gaining acceptance worldwide, as the
regulatory bodies of several countries define its frequency bands and rules of operation. Out …
regulatory bodies of several countries define its frequency bands and rules of operation. Out …
Generalized vernier effect and its application to precise RF Time-of-Flight measurement for wireless sensor networks
S Ko, G Aikawa, J Takayama… - SENSORS, 2010 …, 2010 - ieeexplore.ieee.org
In order to exactly measure time delay of RF signal to travel a short distance, both high
precision clock system and complex signal processing is absolutely required. This report …
precision clock system and complex signal processing is absolutely required. This report …