Results 251 to 260 of about 414,744 (286)

Phase difference of arrival distance estimation for RFID tags in frequency domain

2011 IEEE International Conference on RFID-Technologies and Applications, 2011
The paper gives an overview of phase based ranging techniques, focusing on the phase difference of arrival method measured in frequency domain (FD-PDoA). After a theoretical overview of distance estimation and localization, it introduces an experimental RFID front-end prototype used for FD-PDoA measurements. Proposed modular design is very flexible and
Ales Povalac, Jiri Sebesta
openaire   +1 more source

Airborne passive location based on combined time and frequency difference of arrival

International Journal of Microwave and Wireless Technologies, 2009
Passive location techniques have always been considered an important topic and recently, thanks to digital signal processing (DSP) advances, new methods are being studied and experimented with. The possibility to passively locate radar emitters avoiding transmission is crucial in a variety of military applications, in particular when a flying platform (
Gaetano Severino, Antonio Zaccaron, Riccardo Ardoino   +2 more
openaire   +1 more source

Dual-antenna GNSS spoofing detection method based on Doppler frequency difference of arrival

GPS Solutions, 2019
Recent years have witnessed the emergence of portable global navigation satellite spoofing devices. A variety of anti-spoofing techniques have been dedicated to detecting the presence of spoofing signals, most of which solely utilize either signal characteristics or navigational information. However, since the GNSS system is under continuous monitoring
Li He, Hong Li, Mingquan Lu
openaire   +1 more source

Combination of emitter localization techniques with angle, frequency and time difference of arrival

2013 21st Signal Processing and Communications Applications Conference (SIU), 2013
In this paper, finding the location of a stationary target with a moving platform is analyzed. The estimated measurements (direction, frequency, time difference of arrival) found by parameter estimation algorithms are used to find the target location. Different methods are combined and the improvement in location estimation is observed by using error ...
B. Tufan, T. Engin Tuncer
openaire   +1 more source

Frequency Resolved Angle and Time Difference of Arrival Estimation With Spatial Spectral Holography

Optical Fiber Communication Conference, 2010
Correlative power spectrum and spectral phase mapping via readout of a fiber interferometer with spatial-spectral materials is analyzed and demonstrated to enable precise frequency resolved time delay and angle of arrival estimation with microwave signals.
R. Krishna Mohan, Z. W. Barber, C. Harrington, W. R. Babbitt   +3 more
openaire   +1 more source

Research on Multi-platform Time Difference of Arrival and Frequency Difference of Arrival Joint Location Technology

2021 IEEE 6th International Conference on Signal and Image Processing (ICSIP), 2021
Kai Wang, Zhanglong Chen, Qiufei Yan
openaire   +1 more source

A novel Cramer-Rao lower bound of time difference of arrival for frequence hopping signals

2012 5th International Congress on Image and Signal Processing, 2012
Frequency hopping signals have been widely used in military and civilian applications during the last few decades. It's of great value to locate emitters of frequency hopping signals, especially in military operations. Localization by time difference of arrival (TDOA) is a passive location method of good accuracy which utilizes the differences between ...
Jinyu Xiong, Xinxin Ouyang, Laiyuan Luo
openaire   +1 more source

Comparing frequency-difference beamforming and delay-and-sum beamforming as an estimator of direction-of-arrival

Journal of the Acoustical Society of America, 2016
Direction-of-arrival estimation (DOA) is an important and long-studied problem in array signal processing. Existing algorithms such as conventional delay-and-sum beamforming are limited in performance and become inadequate for a high-frequency broadband source and when the receiving linear array is sparse.
Eldridge Alcantara, Les Atlas, Shima Abadi   +2 more
openaire   +1 more source

Maximum likelihood estimates of the time and frequency differences of arrival of weak cyclostationary digital communications signals

MILCOM 2000 Proceedings. 21st Century Military Communications. Architectures and Technologies for Information Superiority (Cat. No.00CH37155), 2002
Algorithms for the asymptotic weak-signal maximum-likelihood estimates (MLE) of the time and frequency differences of arrival of digital communications signals are presented. Results from Monte Carlo simulations with BPSK signals indicate the new algorithms outperform traditional techniques like the generalized cross correlation function and the ...
D.A. Streight, G.K. Lott, W.A. Brown
openaire   +1 more source

Frequency difference-wavenumber analysis for direction-of-arrival estimation in sparse vertical array

The Journal of the Acoustical Society of America
Frequency–wavenumber (f–k) analysis can determine the direction-of-arrival (DOA) for broadband signals captured by a vertical array [M. J. Hinich, J. Acoust. Soc. Am., 69, 732–737 (1981)]. The sparse vertical array generates numerous sidelobes in the f–k domain due to aliasing errors resulting from the spatial sampling. This presentation introduces the
Donghyeon Kim, Gihoon Byun, J. S. Kim
openaire   +1 more source