A real-time location system using near-field electromagnetic ranging

  title={A real-time location system using near-field electromagnetic ranging},
  author={Hans Gregory Schantz},
  journal={2007 IEEE Antennas and Propagation Society International Symposium},
  • H. Schantz
  • Published 9 June 2007
  • Business
  • 2007 IEEE Antennas and Propagation Society International Symposium
Near-field electromagnetic ranging (NFER) technology is emerging as a preferred real-time locating system (RTLS) solution for operation in complicated indoor propagation environments [H. Schantz and R. DePierre, 2005]. Operating at low frequencies, typically within the AM broadcast band (530-1710kHz), NFER systems exploit the near-field behavior of radio signals within about one-third of a wavelength. This paper explores the performance of NFER systems and the propagation of NFER signals. 

Figures from this paper

Wideband Signal Based Near-Field Electromagnetic Ranging for Indoor Localizatio
The near-field electromagnetic ranging (NFER) technology exploits the near-field phase behavior of low frequency signals to measure the distance and can provide better ranging performance than the
Characterization of error in a Near-Field Electromagnetic Ranging (NFER) Real-Time Location System (RTLS)
We provide results and error analysis for over four hundred individual measurements of a Near-Field Electromagnetic Ranging (NFER®) Real-Time Location System (RTLS). The system operated over ranges
Transponder and reader concept for a HF locating system
This paper presents a low-frequency local positioning system operating at 13.56 MHz. With a wavelength of around 22 m the system operates in the near field. The phase shift between a CW signal
A Near-Field-based TPMS Solution for Heavy Commercial Vehicle Environement
A Near-Field Communication (NFC) based solution for Tire pressure monitoring system (TPMS) in heavy commercial vehicles instead of the high frequency Far-Field communication used in conventional TPMS is proposed.
Near-Field Ranging Using Dual Mode Magnetic Induction
We propose a novel method of ranging by using an antenna’s common and difference mode utilizing magnetic induction (MI). Localization through MI has several practical advantages such as its
Radio wave propagation impact on signal parameters of local positioning systems
This article focuses on radio wave propagation condition impact on local positioning system radio signal parameters. The choice of radio frequency depending on antenna heights is considered as well
Radio frequency (RF) time-of-flight ranging for wireless sensor networks
A two-way Time-of-Flight (TOF) ranging scheme is presented using narrow-band RF and demonstartes a novel system where resolution and accuracy are time dependent in comparison to alternative frequency dependent methods using narrowband RF.
A distributed newton iteration based localization scheme in underground tunnels
To reduce the communication cost, a distributed localization scheme is proposed, where a simple Newton Iteration location estimation algorithm is embedded in the blind node, and Linear least square estimation is used as the initial value to accelerate the convergence of the iteration.
Adaptive time delay estimation algorithm for indoor near‐field electromagnetic ranging
It is concluded that the proposed RSSIMCC algorithm can estimate the time delay with small steady-state error in near-field electromagnetic ranging application and can be exploited based on the near- field behavior of radio signals for ranging in an indoor environment.
FPGA implementation of adaptive time delay estimation for real‐time near‐field electromagnetic ranging
The experimental results indicate that the delayed maximum correntropy criterion–based explicit time delay estimation algorithm has fast convergence rate and good steady‐state performance in an impulsive noise environment.


Near field propagation law & a novel fundamental limit to antenna gain versus size
  • H. Schantz
  • Business
    2005 IEEE Antennas and Propagation Society International Symposium
  • 2005
The paper presents a theoretical analysis of the near field channel in free space. The theoretical model is then validated by comparison to data measured in an open field. The results are important
Near field phase behavior
  • H. Schantz
  • Engineering
    2005 IEEE Antennas and Propagation Society International Symposium
  • 2005
This paper presents a theoretical analysis of near field phase behavior in free space. Then this paper validates the theoretical model by numerical modeling and comparison to experimental data. Near
Antennas and Radiowave Propagation
Antennas and radiowave propagation , Antennas and radiowave propagation , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
System and method for near-field electromagnetic ranging
  • US Patent 6,963,301, November 8, 2005. “NFER” is a registered trademark of the Q-Track Corporation. For additional information please see www.q-track.com.
  • 2005