Results 251 to 260 of about 42,058 (273)

Radar Angle-of-Arrival Estimation

2013
The paper focus on interferometer angle error and on the signal processing required for interferometry, but also introduce monopulse angle-of-arrival for comparison. This chapter, derive the basic equations for monopulse angle estimation and discuss the fundamentals of eigen-based superresolution techniques.
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Angle of Arrival of Z Echoes

Nature, 1953
IT has been suggested by Scott1 that uncoupled F-region Z echoes are due to longitudinally propagated waves reflected from an area near the magnetic zenith.
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Angle-of-arrival estimation in atmospheric turbulence

The Journal of the Acoustical Society of America, 2005
An angle-of-arrival estimator is derived for acoustic waves that propagate in atmospheric turbulence. The estimator directly accounts for the effects of random fluctuations in the propagation environment. The first and second moments of the sound field, as derived from the theory of wave propagation in a random medium, and realistic atmospheric ...
Sandra Collier, Vladimir Ostashev, D. Keith Wilson   +2 more
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Measurement of Angle-of-Arrival

1969
While a large number of different types of direction-finder for obtaining the bearings of radio signals have been developed, ranging from simple vertical loop antennas to very complicated systems such as the Wullenweber type in which a narrow beam is used to scan the incoming wave system, very few of them can be applied to the problem of measuring ...
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Cooperative localization using angle-of-arrival information

11th IEEE International Conference on Control & Automation (ICCA), 2014
This paper studies the cooperative localization problem of sensor networks using local angle-of-arrival measurements in two scenarios. (i) The angle-of-arrival information can be mutually measured by pairs of sensors in their local frames which do not share the same orientation; (ii) The angle-of-arrival information can not be mutually measured by ...
Jubin Zhong, Zhiyun Lin, Zhiyong Chen, Wenyuan Xu   +3 more
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Angle-of-arrival measurements of ionospheric irregularities

Canadian Journal of Physics, 1987
Recent improvements in instrumentation permit sufficient resolution in angular-deviation measurements to yield information on the shape of irregularities. The expected deviation imposed upon very high frequency signals from an orbiting satellite by an irregularity with a Gaussian electron-density distribution is modelled.
E. Griffioen, G. F. Lyon
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Interferometer Angle-of-Arrival Error Effects

2013
The angle error equations derived to this point have reflected only the error performance due to thermal noise effects. However, angle-of-arrival performance can be affected by various sources of error other than thermal noise. In this chapter, we focus on errors that affect angle accuracy as opposed to angle precision.
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An experimental angle of arrival estimation system

[1991] Conference Record of the Twenty-Fifth Asilomar Conference on Signals, Systems & Computers, 2002
The authors describe an experimental hardware system used to estimate the angles of arrival of multiple cochannel emitters. The system consists of a four-element phased array antenna and a personal computer housing four coherentized digital receivers.
R. Lonski, R. Gooch
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A New CLEAN Algorithm for Angle of Arrival Denoising

IEEE Antennas and Wireless Propagation Letters, 2009
In a previous work, a novel technique for angle of arrival (AOA) measurement was proposed. This technique consists of sweeping the angular domain with one antenna, step by step, such that at each measurement step the received signal voltage at the rotating antenna (sensor) is measured.
Akhdar, Oussama, Mouhamadou, Moctar, Carsenat, David, Decroze, Cyril, Monédière, Thierry   +4 more
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Tropospheric Effects on Angle-of-Arrival

2013
In this chapter, we characterize the effects of angle bias due to refraction and angle precision due to turbulence. As a result, angle bias due to refraction can be calibrated and removed, if possible, and any residual error can be quantified in the interferometer angle error budget.
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