A5065624859- Indoor and Outdoor Localization Technologies
- Inertial Sensor and Navigation
- GNSS positioning and interference
- Gait Recognition and Analysis
- Robotics and Sensor-Based Localization
- Chaos control and synchronization
- Video Surveillance and Tracking Methods
- 3D Surveying and Cultural Heritage
- Advanced Algorithms and Applications
- Advanced Wireless Communication Techniques
- ECG Monitoring and Analysis
- Geophysics and Sensor Technology
- Plasma Diagnostics and Applications
- Target Tracking and Data Fusion in Sensor Networks
- Water Systems and Optimization
- Geophysics and Gravity Measurements
- Underwater Vehicles and Communication Systems
- Water Quality Monitoring Technologies
- Magnetic Properties and Applications
- Mathematical Dynamics and Fractals
- Traffic Prediction and Management Techniques
- Power Line Communications and Noise
- Advanced Sensor and Control Systems
- Magnetic Bearings and Levitation Dynamics
- IoT-based Smart Home Systems
Beihang University
2013-2025
Nanjing University of Information Science and Technology
2024
Jiangxi Transportation Research Institute
2023
Tsinghua–Berkeley Shenzhen Institute
2020
With the explosive development of pervasive computing and Internet Things (IoT), indoor positioning navigation have attracted immense attention over recent years. Pedestrian dead reckoning (PDR) is a potential autonomous localization technology that obtains position estimation employing built-in sensors. However, most existing PDR methods assume smartphone held horizontally points to walking direction. To solve errors caused by inconsistency headings between heading pointing smartphone, we...
Every year, for ten years now, the IPIN competition has aimed at evaluating real-world indoor localisation systems by testing them in a realistic environment, with movement, using EvAAL framework. The provided unique overview of state-of-the-art systems, technologies, and methods positioning navigation purposes. Through fair comparison performance achieved each system, was able to identify most promising approaches pinpoint critical working conditions. In 2020, included 5 diverse off-site...
Due to the low-quality sensors of consumer-grade devices, such as smartphones, traditional point-based visual–inertial simultaneous localization and mapping (SLAM) techniques applied smartphones commonly suffer from low accuracy potential tracking divergence. Incorporating more measurements can enhance performance robustness, but additional computational consumption may not satisfy real-time requirements in mobile location-based services, pedestrian positioning. For SLAM applications focused...
Abstract In August 2023, Xiaomi unveiled the Redmi K60 Ultra, first multi-frequency smartphone integrated with BeiDou-3 Navigation Satellite System Precise Point Positioning (PPP-B2b) services and employing PPP technology as primary positioning method. The enhancement service is provided by Assisted Global (A-GNSS) location platform developed China Academy of Information Communications Technology. signaling interaction between server users strictly adheres to Third Generation Mobile...
Simultaneous localization and mapping (SLAM) is currently a widely used technology for indoor positioning. Many studies have focused on the smartphone-based navigation its portability feature-rich sensors. But due to low-quality sensors complex environments, current SLAM-based positioning using smartphones still poses great challenges, such as inherent cumulative global drift potential divergence facing texture-less regions. For regular gait characteristics of pedestrians when naturally...
The pedestrian navigation system (PNS) based on inertial system-extended Kalman filter-zero velocity update (INS-EKF-ZUPT or IEZ) is widely used in complex environments without external infrastructure owing to its characteristics of autonomy and continuity. IEZ, however, suffers from performance degradation caused by the dynamic change process noise statistics heading estimation errors. main goal this study effectively improve accuracy robustness localization integration low-cost...
With the increasing complexity of electromagnetic environment and continuous progress electronic interference technology, Global Navigation Satellite System (GNSS) spoofing attacks have become a practical threat. As result, focus GNSS improvement has shifted from improving accuracy to reliability. Combining an inertial navigation system (INS) is effective for detection mitigation since INS can independently provide high frequency, accuracy, multi-category information within period time. This...
Foot-mounted inertial pedestrian positioning system (FIPPS) is increasingly important in the Internet of Things (IoT) and smart cities because passive, anti-interference, fully automatic advantages. However, FIPPS faces problem unknown initial positions accumulative errors practical applications, which makes trajectory inaccurate unable to be matched a well-defined coordinate system. A seamless indoor–outdoor method based on smartphone precise point (PPP)/3-D map/barometer augmentation...
In an intelligent information society, indoor pedestrian navigation systems based on inertial sensors are becoming increasingly important due to the advantages of autonomy and continuity in positioning. However, these cannot estimate altitude because divergence channels complexity movement patterns. To address this challenge, article proposes estimation method utilizing measurement unit (IMU) sensor installed pedestrian's foot. Specifically, calculates height difference steps with system...
Owing to autonomy and continuity, a pedestrian navigation system (PNS) has been widely deployed, which is based on the micro electro-mechanical inertial measurement unit (MEMS-IMU) strapdown (SINS). However, altitude information cannot be effectively obtained in this by double integral of vertical acceleration because channel divergent SINS. The study aimed at improving accuracy robustness estimation through novel method foot-mounted MEMS-IMU. More specifically, proposed exploits adaptive...
Ultra-wide Band (UWB) plays an increasingly important role in indoor positioning due to its advantages of low emission power, high multipath resolution, and centimeter level accuracy. However, the UWB system is vulnerable Non-Line Sight (NLOS) because human or vehicle occlusion. In this paper, a novel Pedestrian Dead Reckoning (PDR) aided method proposed. Firstly, NLOS accuracy factor model constructed according distance difference between PDR. This judges whether works normally not. Once...
When the satellites CMG (Control Moment Gyroscope) generate control moment, they will also periodic and broadband disturbance vibration force, have a greater impact on performance of instruments with high pointing precision stability. This paper analyze large 70Nms belonging to remote sensing satellite, its feature is mass moving parts. So when it installed test table that we designed independently, fundamental frequency system as whole significantly reduce. Based past study purpose this...
Abstract Indoor pedestrian altitude information plays a key role in such applications as emergency relief and military reconnaissance. However, height errors of inertial positioning grow without boundary because the channel divergence Strap-down Inertial Navigation System. This article proposes new vertical location method based on foot-mounted Measurement Unit online floor modeling. First, number stairs at each step is calculated after corrected by error compensation model. Second, prior...
In order to predict the micro-vibration disturbance of reaction wheel, an improved experience model has been provided, which expresses effect wheels natural frequencies being dominating factor in amplifying disturbance. WLS-SVR algorithm is applied identify parameters this model. The robust characteristic promises global optimal estimation can be achieved. Experiment set up measure wheel. Data achieved from experiment are used get and verify identification results algorithm. show describes...
BeiDou is the Chinese global satellite navigation system steadily accelerating towards completion by 2020. The aims to provide continuous, stable and reliable position, timing services users across globe. This research focusses on determining accuracy using an extended Kalman filter for point positioning in single frequency Receivers. Low cost receivers are targeted mass market applications. model described detail results obtained both traditional least squares technique. It seen that based...
Congestive heart failure is a kind of cardiovascular disease that poses severe threat to human health and the early, convenient automated detection it great clinical significance. Therefore, we proposed method based on fixed number consecutive ECG heartbeats via bidirectional RNN combined with attention mechanism detect it. In this study, established CHF dataset for experiments Physionet. After signal noise removal, windows containing were extracted as samples, which divided into training...