Results 31 to 40 of about 1,019,523 (294)

Joint Carrier Phase Estimation and Turbo Decoding Using Bit Carrier Phase APP Decoder [PDF]

open access: yesIEEE Transactions on Communications, 2007
In this paper, we present an algorithm for joint carrier phase estimation and turbo decoding for the case of rapidly varying carrier phase during the transmitted block. The proposed algorithm shows improved performance over previously proposed communication schemes, both coherent and noncoherent, for channels with additive white Gaussian noise and high
Amir Saroka, Dan Raphaeli
openaire   +1 more source

Improving the Triple-Carrier Ambiguity Resolution with a New Ionosphere-Free and Variance-Restricted Method

open access: yesRemote Sensing, 2017
The ionospheric bias and the combined observation noise are two crucial factors affecting the reliability of the triple-carrier ambiguity resolution (TCAR).
Chun Jia   +5 more
doaj   +1 more source

Comparison of Multi-GNSS Time and Frequency Transfer Performance Using Overlap-Frequency Observations

open access: yesRemote Sensing, 2021
The modernized GPS, Galileo, and BeiDou global navigation satellite system (BDS3) offers new potential for time transfer using overlap-frequency (L1/E1/B1, L5/E5a/B2a) observations.
Pengfei Zhang   +5 more
doaj   +1 more source

Indoor carrier phase positioning algorithm based on time-varying clock error elimination

open access: yesTongxin xuebao, 2021
To solve the problems of low positioning accuracy of traditional positioning algorithm and unsynchronized system clock in indoor wireless environment, a 3D positioning algorithm was proposed based on the fusion of triple-differential carrier phase ...
Shaoshuai FAN   +4 more
doaj  

Determination of Clock Offset Using GPS Carrier Phase Measurements [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2005
Every time laboratory in the world follows an international standard time scale and GPS (Global Positioning System) is playing an important role. Korea Research Institute of Standards and Science is also operating a permanent GPS station for time ...
Jihyun Ha, Kwan-Dong Park, Chang-Bok Lee
doaj   +1 more source

Experimental Estimation of Deviation Frequency within the Spectrum of Scintillations of the Carrier Phase of GNSS Signals

open access: yesRemote Sensing, 2021
The term deviation frequency (fd) denotes the boundary between the variable part of the amplitude and phase scintillation spectrum and the part of uninformative noises.
Vladislav Demyanov   +3 more
doaj   +1 more source

Performance of GPS sidereal filters during a satellite outage

open access: yesJournal of Geodetic Science, 2017
Sidereal filtering is the name of a technique used to reduce the effect of multipath interference on a GPS position time series associated with a static or quasi-static antenna.
Atkins C., Ziebart M. K.
doaj   +1 more source

Carrier Phase Residual Modeling and Fault Monitoring Using Short-Baseline Double Difference and Machine Learning

open access: yesMathematics, 2023
Global Navigation Satellite Systems (GNSS) are used to provide accurate position, navigation, and time (PNT) information to users in various sectors of our society including transportation.
Dong-Kyeong Lee   +2 more
doaj   +1 more source

Covariance Analysis of Real-Time Precise GPS Orbit Estimated from Double-Differenced Carrier Phase Observations

open access: yesRemote Sensing, 2019
The covariance of real-time global positioning system (GPS) orbits has been drawing attention in various fields such as user integrity, navigation performance improvement, and fault detection.
Sunkyoung Yu   +3 more
doaj   +1 more source

An Increase of GNSS Data Time Rate and Analysis of the Carrier Phase Spectrum

open access: yesRemote Sensing, 2023
Natural hazards and geomagnetic disturbances can generate a combination of atmospheric and ionospheric waves of different scales. The carrier phase of signals of global navigation satellite system (GNSS) can provide the highest efficiency to detect and ...
Vladislav Demyanov   +3 more
doaj   +1 more source

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