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Collaborative Solutions for Interference Management in GNSS-Based Aircraft Navigation
Sensors, 2020 Nowadays, the Global Navigation Satellite Systems (GNSS) technology is not the primary means of navigation for civil aviation and Air Traffic Control, but its role is increasing. Consequently, the vulnerabilities of GNSSs to Radio Frequency Interference,
Mario Nicola +5 more
doaj +1 more source
Optimal estimation of quantum dynamics [PDF]
, 2000 We construct the optimal strategy for the estimation of an unknown unitary transformation $U\in SU(d)$. This includes, in addition to a convenient measurement on a probe system, finding which is the best initial state on which $U$ is to act.
A. Acín +11 more
core +2 more sources
Research on the Deception Mechanism of Frequency Diverse Array Radar in Radar Reconnaissance and Direction Finding [PDF]
Hangkong bingqiIn the ground attack mission, the attack plan needs to be formulated and distributed to the attack aircraft based on the threat source intelligence data obtained in advance with the help of the tactical mission planning system.
Zhang Jing, Wang Bo, Meng Guoxiang, Chen Shuangyan
doaj +1 more source
Highly Accurate Two-Dimensional Direction Finding Using Cumulant
IEEE Access, 2018 This paper proposes a new two-dimensional direction finding algorithm for estimating multiple non-Gaussian signals using cumulants. This new algorithm: 1) employs an array geometry consisting of a nine-element non-uniformly spaced cross-shaped sub-array ...
Chen Gu, Hong Hong, Xiaohua Zhu, Jin He
doaj +1 more source
Wireless Direction Finding [PDF]
Students Quarterly Journal, 1939 THE appearance of the fourth edition of this book will do much to dispel the impression, prevalent in some quarters, that the technique of radio direction finding has been rendered obsolete by the introduction and development of radar in recent years.
openaire +2 more sources
Direction finding for an extended target with possibly non-symmetric spatial spectrum [PDF]
, 2004 We consider the problem of estimating the direction of arrival (DOA) of an extended target in radar array processing. Two algorithms are proposed that do not assume that the power azimuthal distribution of the scatterers is symmetric with respect to the ...
Besson, Olivier, Monakov, Andrei
core +1 more source
Finding Principal Null Direction for Numerical Relativists
, 1994 We present a new method for finding principal null directions (PNDs). Because our method assumes as input the intrinsic metric and extrinsic curvature of a spacelike hypersurface, it should be particularly useful to numerical relativists.
Arianrhod R +14 more
core +1 more source
Direction finding with partly calibrated uniform linear arrays [PDF]
, 2012 A new method for direction finding with partly calibrated uniform linear arrays (ULAs) is presented. It is based on the conventional estimation of signal parameters via rotational invariance techniques (ESPRIT) by modeling the imperfections of the ULAs ...
Chan, SC, Liao, B
core +1 more source
A Two-Dimensional Direction Finding Method Based on Non-Uniform Array
IEEE Access, 2021 In this paper, an aperture expanding direction finding algorithm using L-shaped non-uniform sparse array is proposed. Firstly, the virtual array is expanded by vectorizing, de-redundant and sorting of received data covariance matrix.
Guibao Wang +3 more
doaj +1 more source
Multisource Self-calibration for Sensor Arrays [PDF]
, 2009 Calibration of a sensor array is more involved if the antennas have direction dependent gains and multiple calibrator sources are simultaneously present. We study this case for a sensor array with arbitrary geometry but identical elements, i.e.
van der Veen, Alle-Jan +1 more
core +1 more source