A5100408663- GNSS positioning and interference
- Inertial Sensor and Navigation
- Ionosphere and magnetosphere dynamics
- Geophysics and Gravity Measurements
- Indoor and Outdoor Localization Technologies
- Magnetic Bearings and Levitation Dynamics
- Satellite Communication Systems
- Telecommunications and Broadcasting Technologies
- Pregnancy and Medication Impact
- Epilepsy research and treatment
- Error Correcting Code Techniques
- Pharmacological Effects and Toxicity Studies
- Advanced Wireless Communication Techniques
- Astronomical Observations and Instrumentation
- Space Technology and Applications
First Affiliated Hospital of Xi'an Jiaotong University
2025
Shanghai Polytechnic University
2015-2019
Xidian University
2013-2017
China Academy of Space Technology
2017
Ordnance Engineering College
2009
Xinjiang Astronomical Observatory
2009
Background Information on fetal risks with maternal seizures during pregnancy is scarce. This study investigates seizure control and associated in different stages of among pregnant women epilepsy (PWWE). Methods The nested case–control enrolled PWWE between 2009 2023 China. was obtained seizures, antiseizure medication (ASM), folic acid supplementation outcomes. primary outcome composite including major congenital malformations (MCMs), neurodevelopmental delay, low birth weight (LBW) death....
Maximum likelihood estimation (MLE) has been researched for some acquisition and tracking applications of global navigation satellite system (GNSS) receivers shows high performance. However, all current methods are derived operated based on the sampling data, which results in a large computation burden. This paper proposes low-complexity MLE carrier loop weak GNSS signals processes coherent integration instead data. First, cost function signal parameters such as amplitude, phase, Doppler...
The same-beam VLBI observations of Rstar and Vstar, which were two small satellites Japanese lunar mission, SELENE, successfully performed by using Shanghai Urumqi 25-m telescopes. When the separation angle between Vstar was less than 0.1 deg, differential phase delay X-band signals on Shanghai-Urumqi baseline obtained with a very error 0.15 mm rms, reduced 1–2 order compared former results. 0.56 S-band also several rms. orbit determination for performed, accuracy improved to level meters...
Due to the influence of bit sign and frequency error on integration peak, Deterministic Compressed GNSS Acquisition Method (DCGAM) has poor detection performance in high dynamic environments. For fast acquisition environments, this paper proposed an improved compressed method using adjacent part differential coherence. First, coherence process between two neighbor milliseconds is used. This reduces impact amplitude. Then, decision variable built when signal goes through process. The...
The log–polar transform (LPT) is introduced into the star identification because of its rotation invariance. An improved autonomous algorithm proposed in this paper to avoid circular shift feature vector and reduce time consumed using LPT. In algorithm, pattern same navigation remains unchanged when stellar image rotated, which makes it able time. logarithmic values plane distances between neighbor stars are adopted structure star, enhances robustness identification. addition, some efforts...
This paper gives an overview on system architecture and function of electromagnetic interference on-site detection system. A special RF filter bank was designed to protect the system, radio monitoring technology is used locate source interference, help improve safety features satellite more actively.
For global navigation satellite system (GNSS) signals in Gaussian and Rayleigh fading channel, a novel signal detection algorithm is proposed. Under the low frequency uncertainty case, after performing discrete cosine transform (DCT) to outputs of partial matched filter (PMF) for every antenna, high order components transforming domain will be filtered, then equal-gain (EG) combination inverse (IDCT) reconstructed would done subsequently. Thus, due different distribution characteristics...
The high precision denotation model of satellite orbit dynamics based on physics parameter and mathematics which associates sparse representation with time sequence analysis, nonlinear semi-parametric combined observation system error parameters modeling non-parametric component error, determination (COD) parameterized fusion are established aiming at multi-satellite COD bi-satellite positioning low earth orbiters (LEOs). Then estimation algorithms the former two kinds models algorithm...
Summary The binary offset carrier (BOC) modulated signal can improve the positioning accuracy and increase multipath resistance in global navigation satellite system (GNSS), it may cause potential ambiguity process of acquisition code tracking. In this paper, a simple but efficient unambiguous receiver is firstly proposed for multiple side‐peaks mitigation by implementing correlation received BOC with local sine wave instead square used at transmitter. Moreover, degradation sharpness...