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Article
Open AccessRemote sensing and its applications using GNSS reflected signals: advances and prospects
The Global Navigation Satellite Systems (GNSS), including the US’s GPS, China’s BDS, the European Union’s Galileo, and Russia’s GLONASS, offer real-time, all-weather, any-time, anywhere and high precision obse...
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Article
A two-antenna GNSS approach to determine soil moisture content and vegetation growth status
In land surface remote sensing using Global Navigation Satellite System reflectometry (GNSS-R) signals, it is common to observe signal coupling between the reflections from the soil surface and vegetation. But...
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Article
Pseudorange characteristics of soil-transmitted GNSS signals and their application in soil moisture content retrieval
The characteristic parameters of global navigation satellite system (GNSS) signals, such as the amplitude, phase, and pseudorange, will vary as the signals are transmitted through media. The power attenuation ...
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Article
Can we measure sea surface wind speed with a smartphone?
We aim to explore the feasibility of using a smartphone in-built GNSS sensor to measure sea surface wind speed. For this purpose, a proof-of-concept campaign is conducted. Two observables that may be sensitive...
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Article
Can sea ice thickness be retrieved using GNSS-interferometric reflectometry?
A method for retrieving snow and sea ice thickness is developed and simulations are conducted to evaluate the feasibility of the proposed method. When using a defined envelope amplitude and phase, for the snow...
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Article
Coastal observation of sea surface tide and wave height using opportunity signal from Beidou GEO satellites: analysis and evaluation
In this paper, the methods retrieving tide and SWH using reflected BeiDou GEO satellite signals are proposed, and a data-driven method is proposed to calibrate sea state bias of the retrieved tide. In addition...
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Chapter and Conference Paper
Modeling and Simulation of GNSS-R Signals with Ocean Currents
In recent years, with the development of Global Navigation Satellite System (GNSS), GNSS reflectometry (GNSS-R) has become a new method in the field of remote sensing. And the simulation of the GNSS-R research...
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Chapter and Conference Paper
A Multi-classifier Approach for Fuzzy KNN Based WIFI Indoor Localization
WIFI fingerprint positioning technology has been widely studied and developed for a long time and lots of experiment systems have been established. However, the time-varying and nonlinear features of the WIFI...
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Chapter and Conference Paper
Seamless Positioning and Navigation System Based on GNSS, WIFI and PDR for Mobile Devices
As the rapid development of mobile Internet, many location-based services (LBS) have emerged for commercial cooperation, entertainment, security, and so forth. All of these require accurate and real time posit...
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Chapter and Conference Paper
Study of Agricultural Machinery Operating System Based on Beidou Satellite Navigation System
Real-time positioning system, circuit system, data transferring and remote monitor and control used for farmland operation are studied with Beidou satellite navigation system signal, and Locomotive operation m...
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Chapter and Conference Paper
Ship Detection and Data Processing by Using Shore-Based GNSS-R
The use of GNSS-R technology to detect surface ships is a new application in this field. Aiming at the blurring problem of mirror image and diffuse scattering component in sea surface electromagnetic field, th...
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Chapter and Conference Paper
Cell Selection and Reselection Schemes in Multi-RAT Networks
In order to perform cell selection and reselection in Multi-RAT (Multi-Radio Access Technology) 2G, 3G and 4G networks, we use combination between priority and ranking based. Specifically for reselection, Tres...
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Chapter and Conference Paper
A New Method Based on QSE Processing for Interferometric GNSS-R Ocean Altimetry
Considering that in conventional GNSS-R (Global Navigation Satellite System-Reflection) altimetry, the reflected signals are cross-correlated with a locally generated clean replica of the transmitted signal, i...
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Chapter and Conference Paper
Typhoon Wind Speed Observation Utilizing Reflected Signals from BeiDou GEO Satellites
Typhoon monitoring utilizing reflected GNSS signals is a new application of GNSS-R technique. Coastal observations are an efficient way for the model of geophysical parameters retrieval in Typhoon and identifi...
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Chapter and Conference Paper
The Impact of SCell Measurement Period on Mobility Performance in LTE-A with Carrier Aggregation
Carrier aggregation (CA) is one of the most distinct features for LTE-Advanced, which is being standardized in 3GPP as part of LTE Release 10. In this paper we study the performance of measurements for deactiv...
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Chapter and Conference Paper
Soil Moisture Measuring on the Basis of GNSS Reflected Signals
GNSS-R based soil moisture estimation relies on the correlation map of the direct and the reflected GNSS signals, and obtains the soil moisture parameters through theory model. The normalized power of the refl...
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Chapter and Conference Paper
Design and Implementation of GNSS-R Software Receiver Based on FFT
The advantages of software receiver are its flexibility, better performance on system update and algorithm optimization. This paper mainly focused on study a software receiver which could be used in GNSS-R res...
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Article
GNSS-R data acquisition system design and experiment
In this paper, the design of a GNSS-R data acquisition system is described, including the antenna, RF (radio frequency) front-end and FPGA (field programmable gate array) based logic circuit for data storage i...
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Chapter and Conference Paper
Multi-Agent Design of Urban Oriented Traffic Integration Control System
In order to solve the key technologies of urban traffic in China, the intelligent means and approach, combined artificial intelligent with tradition control ones, are adopted in the paper. Some hypotheses are ...
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Article
Wavelet kernel Support Vector Machines for sparse approximation
Wavelet, a powerful tool for signal processing, can be used to approximate the target function. For enhancing the sparse property of wavelet approximation, a new algorithm was proposed by using wavelet kernel ...
