Results 141 to 150 of about 89,960 (192)

Aided integer ambiguity resolution algorithm

PLANS 2004. Position Location and Navigation Symposium (IEEE Cat. No.04CH37556), 2004
The key issue in precise positioning using the GPS carrier phase is to solve for the integer ambiguities quickly and correctly. For some navigation applications, external sensors am available that provide auxiliary measurements. For example, in the control and guidance of land vehicles relative to a desired trajectory (e.g., lane-keeping on a highway ...
null Jingrong Cheng, J.A. Farrell, null Lu Yu, E. Thomas   +3 more
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INS aided GPS integer ambiguity resolution

2011 IEEE International Conference on Control Applications (CCA), 2011
Real-time high precision GPS positioning is based on carrier phase measurements, which requires fast and precise on-the-fly integer ambiguity resolution. In some navigation applications, external sensors are available that provide auxiliary measurements.
Anning Chen, Dongfang Zheng, Arvind Ramanandan, Jay A. Farrell   +3 more
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Applied Interval Based Integer Ambiguity Resolution

Navigation, 2009
This paper provides improvements on the interval integer ambiguity resolution algorithm BOUNDS, which can give theoretical guarantees on finding the correct integers. The BOUNDS algorithm is validated by applying it to real GPS data and comparing it to the LAMBDA method.
E. VAN KAMPEN, E. DE WEERDT, Q.P. CHU, J.A. MULDER   +3 more
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Modified weighted integer least squares estimations for GNSS integer ambiguity resolution

Survey Review, 2013
In this contribution, modified versions of Agrell, Eriksson, Vardy, Zeger (AEVZ) algorithms for integer ambiguity resolution of GNSS phase observations are presented. This modification removes many redundant mathematical operations of the AEVZ algorithm based on a recursive function.
S. Jazaeri, A. Amiri-Simkooei, M. Sharifi   +2 more
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Integer Ambiguity Resolution with Nonlinear Geometrical Constraints

2011
Integer ambiguity resolution is the key to obtain very accurate positioning solutions out of the GNSS observations. The Integer Least Squares (ILS) principle, a derivation of the least-squares principle applied to a linear system of equations in which some of the unknowns are subject to an integer constraint, was demonstrated to be optimal among the ...
Giorgi, G, Teunissen, Peter, Verhagen, S, Buist, Peter   +3 more
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Integer ambiguity resolution in phase closure imaging

Journal of the Optical Society of America A, 2001
Phase calibration is the key operation of phase closure imaging. In the case of nonredundant arrays, the related problem amounts to finding the node of a Z lattice closest to the end of a vector, the components of which are the differences between the closure phases of the data and those of the model.
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Ambiguity of integer sequences and application

Proceedings of 1994 IEEE International Symposium on Information Theory, 2002
We present an algorithm which solves in polynomial time the problem of the ambiguity of integer sequences. This is done by introducing a suitable transformation from F/sub 2//sup n/ to {-1,0,1}/sup n/ and by the search of a short vector in a reduced lattice according to the L/sup 3/ algorithm.
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Near-real-time GPS integer ambiguity resolution

IEEE Conference on Decision and Control and European Control Conference, 2011
Real-time decimeter accuracy GPS positioning can be achieved using carrier phase measurements. This requires fast and reliable on-the-fly integer ambiguity resolution. However, in GPS challenged areas (e.g. Urban canyons, tunnels, thick canopy etc.) the GPS receiver may not be able to track a sufficient number of satellites to resolve the integer ...
Anning Chen, Dongfang Zheng, Arvind Ramanandan, Jay A. Farrell   +3 more
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Integer ambiguity validation: an open problem?

GPS Solutions, 2004
The problem of integer estimation has drawn a lot of attention in the past decade, and is now often considered solved. However, a parameter resolution theory cannot be considered complete without rigorous measures for validating the parameter solution.
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Integer Ambiguity Algebra

2018
In this section we develop integer ambiguity algebra, a mathematical approach to handle integer ambiguities between different GNSS frequencies and introduce what we call the ambiguity-free linear combination. We first show the vector form of the wide-lane ambiguity for multi-frequency GNSS and then develop integer ambiguity algebra and show in detail ...
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