16 Result(s)
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Chapter and Conference Paper
The Analysis and Simulation of Multipath Error Fading Characterization in Different Satellite Orbits
The “Standing multipath” was discovered when ranging to the GEO satellite in WAAS, the fading characterization of the range multipath error of the GEO satellites is quite different from that of the MEO satelli...
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Chapter and Conference Paper
An Integrated MEMS IMU/Camera System for Pedestrian Indoor Navigation Using Smartphones
Pedestrian navigation remains a difficulty in the navigation feild, especially for the indoor environment. Previous research demonstrated that the integration of camera and IMU is able to provide the navigatio...
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Chapter and Conference Paper
Geodetic Sensor Systems and Sensor Networks: Positioning and Applications
This contribution focuses on geodetic sensor systems and sensor networks for positioning and applications. The key problems in this area will be addressed together with an overview of applications. Global Navi...
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Chapter and Conference Paper
The Implementation of Rapid Acquisition Algorithm for GPS Weak Signal by Using FPGA
The traditional acquisition technology of low orbit GPS signal has been widely applied in the design of GPS navigation receiver. However, navigation receiver can only accept the navigation signal which comes f...
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Chapter and Conference Paper
Fast PPP Ambiguity Resolution Using a Sparse Regional Reference Network
Precise point positioning real-time kinematic (PPP-RTK) can achieve fast ambiguity resolution and precise positioning with the satellite fractional cycle biases (FCBs) and atmospheric correction derived from a...
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Chapter and Conference Paper
Integration of GNSS and MEMS-Based Rotary INS for Bridging GNSS Outages
In a GNSS/INS integrated system, the GNSS outputs, such as position and velocity, are used to estimate the INS navigation errors and inertial sensor errors and the inertial solutions are used to bridge the GNS...
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Chapter and Conference Paper
An Improved Practical Anti-jamming Technique for GNSS Receivers Based ADP in Frequency Domain
Anti-jamming techniques have been widely researched to enhance the reliability and effectivity of Global Navigation Satellite System (GNSS). Amplitude Domain Processing (ADP) is an anti-jamming method base on ...
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Chapter and Conference Paper
Overall Performance Comparison of Three Dual-Frequency Constant Envelop Modulation Schemes for GNSS
In Global Navigation Satellite Systems, dual-frequency constant envelop modulation scheme includes ACE-BOC, TD-AltBOC, and AltBOC. The three modulation schemes have pros and cons on single item evaluation inde...
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Chapter and Conference Paper
Ionospheric STEC and VTEC Constraints for Fast PPP
Significant initialization or convergence time of PPP is a limiting factor for many applications. Recent studies have indicated that external ionospheric information can be applied to provide a tight constrain...
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Chapter and Conference Paper
Ranging Performance Analysis and Discriminator Parameters Optimization for Double Estimator Technology
Double Estimator Technology (DET) uses subcarrier tracking loop and code tracking loop to track the Binary Offset Carrier modulated satellite navigation signal, the two loops couple with each other, which caus...
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Chapter and Conference Paper
A New Satellite Clock Offsets Prediction Method Based on the IGS RTS Products
Satellite clock offsets prediction is crucial for GNSS applications and has attracted much attention from the GNSS community. However, previous satellite clock offset prediction was mostly carried out based on...
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Chapter and Conference Paper
A New Method for Real-Time PPP Correction Updates
Real-time Precise Point Positioning (PPP) is expected to find more and more applications with various precise satellite orbit and clock products becoming more easily and reliably available. A crucial aspect fo...
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Chapter and Conference Paper
High-Precision GLONASS Orbit Prediction for Real-Time Precise Point Positioning
With the revitalization of GLONASS constellation, it becomes feasible to integrate the GLONASS into the conventional GPS-only real-time precise point positioning (PPP) processing to enhance system availability...
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Chapter and Conference Paper
Implementation of a Dual Estimate Tracking Based Multipath Mitigation Method on a Software Receiver
Binary Offset Carrier modulated signal, which will widely be used in next generation Global Navigation Satellite Systems, has multi peaks in the auto-correlation function. In practical application condition, m...
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Chapter and Conference Paper
Instant PPP with Low-Cost Multi-constellation Dual-Frequency GNSS Chipset
With increased measurement quality of low-cost Global Navigation Satellite System (GNSS) receivers, Precise Point Positioning (PPP) becomes feasible using a low-cost multi-constellation single-frequency GNSS r...
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Chapter and Conference Paper
A Coherent Processing Technique with High Precision for BDS B1I and B1C Signals
The smooth transition constraint and constant envelope restriction of the Beidou Navigation Satellite System (BDS) make the legacy regional system B1I signal and new global system B1C signal, which are located...
