Results 1 to 10 of about 367,994 (260)

Characteristics of the BDS Carrier Phase Multipath and Its Mitigation Methods in Relative Positioning [PDF]

open access: yesSensors, 2017
The carrier phase multipath effect is one of the most significant error sources in the precise positioning of BeiDou Navigation Satellite System (BDS).
Wujiao Dai, Qiang Shi, Changsheng Cai
doaj   +4 more sources

Indoor Carrier Phase Positioning Technology Based on OFDM System [PDF]

open access: yesSensors, 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
doaj   +2 more sources

Time-Differenced Carrier Phase Technique for Precise Velocity Estimation on an Android Smartphone [PDF]

open access: yesSensors, 2022
GNSS (Global Navigation Satellite System) receivers are not only able to accurately determine position, but also velocity, knowledge of which could be important in several applications.
Antonio Angrisano   +3 more
doaj   +2 more sources

Wheat height monitoring from GPS/BDS reflected signals using pseudorange and dual-frequency carrier phase observables [PDF]

open access: yesFrontiers in Plant Science
IntroductionGround-based Global Navigation Satellite System Reflectometry (GNSS-R) has recently emerged as a low-cost, continuous, and high-resolution technique for monitoring crop growth.
Mingming Sui   +3 more
doaj   +2 more sources

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
Dan Raphaeli
exaly   +2 more sources

A Dual Frequency Carrier Phase Error Difference Checking Algorithm for the GNSS Compass [PDF]

open access: yesSensors, 2016
The performance of the Global Navigation Satellite System (GNSS) compass is related to the quality of carrier phase measurement. How to process the carrier phase error properly is important to improve the GNSS compass accuracy. In this work, we propose a
Shuo Liu, Lei Zhang, Jian Li
doaj   +2 more sources

Improvement of GNSS Carrier Phase Accuracy Using MEMS Accelerometer-Aided Phase-Locked Loops for Earthquake Monitoring [PDF]

open access: yesMicromachines, 2017
When strong earthquake occurs, global navigation satellite systems (GNSS) measurement errors increase significantly. Combined strategies of GNSS/accelerometer data can estimate better precision in displacement, but are of no help to carrier phase ...
Tisheng Zhang   +4 more
doaj   +2 more sources

Positioning in a Multipath Channel Using OFDM Signals With Carrier Phase Tracking

open access: yesIEEE Access, 2020
In developing a high accuracy terrestrial radio navigation system, as a complement to a global navigation satellite system (GNSS), it is recognized that the performance of time delay estimation is proportional to, and thereby limited by, the signal ...
Han Dun   +2 more
doaj   +3 more sources

Multipath tracking with LTE signals for accurate TOA estimation in the application of indoor positioning

open access: yesGeo-spatial Information Science, 2023
Indoor positioning with high accuracy plays an important role in different application scenarios. As a widely used mobile communication signal, the Long-Term Evolution (LTE) network can be well received in indoor and outdoor environments.
Zhaoliang Liu   +4 more
doaj   +1 more source

Precise Orbit Determination of LEO Satellite Using Dual-Frequency GPS Data [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2009
KOrea Multi-purpose SATellite (KOMPSAT)-5 will be launched at 550km altitude in 2010. Accurate satellite position (20 cm) and velocity (0.03 cm/s) are required to treat highly precise Synthetic Aperture Radar (SAR) image processing.
Yoola Hwang   +3 more
doaj   +1 more source

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