Results 241 to 250 of about 42,058 (273)

Two-dimensional angle of arrival fluctuations

The Journal of the Acoustical Society of America, 1996
Angle of arrival fluctuations are one manifestation of acoustic propagation through a turbulent flow. Here the two-dimensional angle of arrival distribution for a 670-m acoustic path through a high Reynolds number flow in a tidal channel is examined and its origin and relationship to the flow field is determined.
Daniela Di Iorio, David M. Farmer
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Robust Navigation Using Angle of Arrival Measurements

ION GNSS+, The International Technical Meeting of the Satellite Division of The Institute of Navigation
The majority of conventional radionavigation systems are based on Time of Arrival (TOA) measurements of RF signals. By far the most common method is pseudoranging, mainly a result of the undisputed success of Global Navigation Satellite Systems (GNSS) as a ubiquitous technology, especially in aviation.
Osechas, Okuary, Swaszek, Peter, Hartnett, Richard, Seals, Kelly, McGarry, Dahnyoung   +4 more
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Network localization using angle of arrival

2008 IEEE International Conference on Electro/Information Technology, 2008
In this paper, we propose two localization methods using angle of arrival (AoA) information. We assume that nodespsila axis orientations are unknown. Therefore, all AoA measurements are employed to calculate the angle differences of two different nodes viewed by the third one.
null Yanping Zhu, null Daqing Huang, null Aimin Jiang   +2 more
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A simple technique for angle of arrival measurement

2008 IEEE Antennas and Propagation Society International Symposium, 2008
A simple method to calculate the angle of arrival is presented in this paper. The advantages of this method are the unlimited number of the detected angle of arrival in hand and the fact that we donpsilat need to know the nature of the radiating sources in the other hand. However, some disadvantages have been seen.
Akhdar, Oussama, Carsenat, David, Decroze, Cyril, Monédière, Thierry   +3 more
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Angle-of-arrival statistics for low resolution antennas

IEEE Transactions on Antennas and Propagation, 2002
In a scattering environment, the propagation paths to a receiving antenna arrive from a certain angular spread of directions. For a low-resolution antenna, an apparent direction of arrival may be defined as the azimuth direction of maximum power. A small array is used as the antenna and the spatial derivative of the phase along the array axis is taken ...
Andersen, Jørgen Bach, Pedersen, Klaus Ingemann   +1 more
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Angle of Arrival Measurements

2004
The angle of arrival (AOA) is the most valuable piece of information that can be obtained from an enemy radar because the radar cannot change its position drastically in a very short time frame (i.e., a few milliseconds). Unfortunately AOA information is also the most difficult information to obtain. It requires several antennas with receivers. The two
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Angle of arrival estimation using spectral interferometry

Journal of Luminescence, 2010
We have developed a correlative signal processing concept based on a Mach-Zehnder interferometer and spatial-spectral (S2) materials that enables direct mapping of RF spectral phase as well as power spectral recording. This configuration can be used for precise frequency resolved time delay estimation between signals received by a phased antenna array ...
Z.W. Barber, C. Harrington, C.W. Thiel, W.R. Babbitt, R. Krishna Mohan   +4 more
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COMSTAR and CTS angle-of-arrival measurements

Annales des Télécommunications, 1980
This brief note describes angle of arrival measurement made at Columbus, Ohio, USA, on 11.7 and 28.56 GHz earth-space paths. These measurements indicate that the short term deviation of the angle of arrival exceeds 0.1° for 0.01 percent of the time. Such a fluctuation would indicate that adverse effects may be expected for receiving apertures having ...
R. A. Baxter, D. M. J. Devasirvatham, B. W. Kwan, D. B. Hodge   +3 more
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Angle of arrival detection by ESPRIT method

2017 International Conference on Communication and Signal Processing (ICCSP), 2017
The direction of arrival estimation of a signal impinging on a array of antennas is an important aspect in signal processing. In order to estimate the angle, we have to relay on a mathematical function known as “pseudospectrum”. This pseudospectrum estimation methods yields best results, when it is employed along with a superior working algorithm to ...
Pooja Gupta, Vijay Kumar Verma, Vijaydeep Senapati   +2 more
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RF angle of arrival-based node localisation

International Journal of Sensor Networks, 2011
Several localisation algorithms exist for wireless sensor networks that use angle of arrival measurements to derive node position. However, there are limited options for actually obtaining the angle of arrival using resource-constrained devices. In this paper, we describe a technique for determining node bearings based on radio interferometric angle of
Isaac Amundson, Janos Sallai, Xenofon Koutsoukos, Akos Ledeczi, Miklos Maroti   +4 more
openaire   +1 more source