Results 231 to 240 of about 142,731 (260)

Indoor positioning using time difference of arrival between multipath components

International Conference on Indoor Positioning and Indoor Navigation, 2013
Positioning is next to communication the most important field of applications for wireless radio transmissions. This paper considers indoor positioning using wireless signals. Especially in indoor scenarios, multipath reception degrades the accuracy of the positioning device as long as the receiver is based on standard methods.
Gentner, Christian, Jost, Thomas
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System implementation of robust time difference of arrival estimation

2014 International Conference on Orange Technologies, 2014
We combine sound activity detection, sound enhancement, and direction of arrival (DOA) estimation system to an integrated system. We use sound activity detection for finding frames which are sound-dominated, then pass the signal to the subspace based sound enhancement for denoising. Finally, the denoised signal will be input to DOA detection system for
Min Shih, Yan-Yu Lin, Yu-Shan Lin, Chang-Hong Lin, Ming-Yen Chen, Jyun-Hong Li, Chih-Wei Su, Jia-Ching Wang   +7 more
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Estimation of time differences of arrival by pole decomposition

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1983
Time differences of arrival (TDOA's) of emitter wave fronts to a spatially distributed array of sensors can be used to determine the source location. In this paper, we suggest a new method of TDOA estimation for multiple unknown autoregressive moving average (ARMA) sources and additive noise that may be correlated between the sensors.
A. Nehorai, null Guaning Su, M. Morf
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Time difference of arrival dilution of precision and applications

IEEE Transactions on Signal Processing, 1999
Performance prediction for time difference of arrival (TDOA) systems that rely on standard covariance methods exhibit poor correlation with simulated results. A superior metric (TDOA dilution of precision (DOP)) is derived. DOP is familiar to Global Positioning System (GPS) users and, although the equations governing TDOA DOP are quite different ...
J.D. Bard, F.M. Ham
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Joint estimation of time difference of arrival and frequency difference of arrival for cyclostationary signals under impulsive noise

Digital Signal Processing, 2015
The problem of jointly estimating time difference of arrival (TDOA) and frequency difference of arrival (FDOA) or Doppler has a variety of practical applications. The conventional cyclic ambiguity function and the fractional lower-order ambiguity function suffer performance degradation in the presence of non-Gaussian α-stable impulsive noise and ...
Yang Liu, Tianshuang Qiu, Jingchun Li
openaire   +1 more source

Hybrid Localization Based on Time of Arrival and Phase Difference of Arrival Fusion

2019 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC), 2019
To locate the underwater target moving in a large area with a short trajectory, it is necessary to guarantee the positioning accuracy across the whole area. In the paper, a hybrid distributed underwater acoustic positioning system is employed. A positioning method based on time of arrival (TOA) and phase difference of arrival (PDOA) fusion is proposed.
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Bias free estimation of the variance of time of arrival differences

ICASSP '84. IEEE International Conference on Acoustics, Speech, and Signal Processing, 1985
In the frequency domain estimation of Time of Arrival differences, phase data of the cross-spectrum may show correlation between frequency bins due to either insufficient time-bandwidth product or the use of a nonrectangular window on the input signal samples.
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Finite-difference time-domain methods

Nature Reviews Methods Primers, 2023
Fernando L Teixeira, Costas D Sarris, Yisong Zhang   +2 more
exaly   +2 more sources

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
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Real-time time difference of arrival estimation for moving wideband sources

Journal of the Acoustical Society of America, 2016
The modified generalized cross-correlation method is used for finding the time difference of arrival (TDOA) and resolving the angle of arrival toward moving targets in real-time. It addresses the decorrelation due to differential Doppler effect leading to relative time companding (RTC) between sensors.
openaire   +1 more source