Results 11 to 20 of about 58,862 (263)
RELIABILITY OF THE GPS CARRIER-PHASE FIX SOLUTION UNDER HARSH CONDITION [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022 Once the unknown integer ambiguity values are resolved, the GPS carrier phase observation will be transformed into a millimeter-level precision measurement. However, GPS observation are prone to a variety of errors, making it a biased measurement.
M. I. Mohd Dzukhi +5 more
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Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2018 When demodulating signals in communication systems with QPSK modulation operating in the pulsed mode, the following problems arise: rapid elimination of the reference oscillator phase ambiguity and ensuring reliable frame synchronization for a given ...
A. V. Sadchenko +3 more
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Low-complexity DOA estimation method for a co-prime linear array
The Journal of Engineering, 2019 The problem of direction-of-arrival (DOA) estimation for a co-prime linear array is researched. A low-complexity DOA estimation method is proposed. The co-prime array is decomposed into two sparse uniform linear sub-arrays whose inter-element spacing ...
Xuchen Wu +3 more
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Indoor Carrier Phase Positioning Technology Based on OFDM System
Sensors, 2021 Carrier phase measurement is a ranging technique that uses the receiver to determine the phase difference between the received signal and the transmitted signal. Carrier phase ranging has a high resolution; thus, it is an important research direction for
Zhenyu Zhang, Shaoli Kang, Xiang Zhang
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Phase Estimation and Phase Ambiguity Resolution by Message Passing [PDF]
, 2004 Several code-aided algorithms for phase estimation have recently been proposed. While some of them are ad-hoc, others are derived in a systematic way. The latter can be divided into two different classes: phase estimators derived from the expectation-maximization (EM) principle and estimators that are approximations of the sum-product message passing ...
Justin Dauwels +3 more
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Analysis of Range Sidelobe of Pulse Doppler Fuze [PDF]
Hangkong bingqi, 2022 When attacking cruise missile at ultra-low altitude, the pulse Doppler fuze may appear false alarm at the range sidelobe due to range ambiguity. In this paper, the ambiguity graph and the sea echo characteristics of the pulse Doppler fuze are analyzed ...
Yuan Tao, Fan Mingjun
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Sensors, 2018 This paper presents an analytic algorithm for estimating three-dimensional (3-D) localization of a single source with uniform circular array (UCA) interferometers.
Le Zuo, Jin Pan, Boyuan Ma
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Aerospace, 2022 The real-time integer-ambiguity resolution of the carrier-phase observation is one of the most effective approaches to enhance the accuracy of real-time precise point positioning (PPP), kinematic precise orbit determination (KPOD), and reduced-dynamic ...
Zhiyu Wang +7 more
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The Geometry of Ambiguity in One-Dimensional Phase Retrieval [PDF]
SIAM Journal on Applied Algebra and Geometry, 2019 We consider the geometry associated to the ambiguities of the one-dimensional Fourier phase retrieval problem for vectors in ${\mathbb C}^{N+1}$. Our first result states that the space of signals has a finite covering (which we call the root covering) where any two signals in the covering space with the same Fourier intensity function differ by a ...
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BeiDou System (BDS) Triple-Frequency Ambiguity Resolution without Code Measurements
Remote Sensing, 2018 Phase and code measurements achieve ambiguity resolution in medium- or long-baseline computation. However, the code multipath effect on Global Navigation Satellite Systems (GNSS) phase and code measurements is a main source of error for ambiguity ...
Feng-Yu Chu, Ming Yang
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