Yuwen Wang

Research on ZUPT technology for pedestrian navigation

When the satellite signal is blocked, the ground terminal cannot be accurately positioned because it cannot receive the satellite signal. In this case, it is necessary to study how to use other ways to achieve positioning and navigation. Inertial navigation inertial sensors to rely on sensing carrier acceleration and angular velocity, the position of the carrier can provide continuous in is not dependent on any external signal, speed and attitude, autonomous navigation carrier, and therefore can be used as a means to enhance the single satellite navigation and positioning. In this paper, we design a scheme to enhance the positioning accuracy by using the fusion of chip level MEMS inertial sensor and single satellite scanning position.

A rapid localization algorithm suitable for the single satellite on the MEO

When it comes to satellite navigation and positioning services, people firstly think of the GPS/GLONASS/BeiDou/Galileo and other mature navigation systems. But the single satellite navigation and positioning may play a gigantic role when facing disasters. In this paper, we briefly analyzed the traditional localization algorithms of single satellite. Meanwhile, a new rapid localization algorithm is proposed in this paper which is based on the electron beam scanning of the single satellite in the MEO (Medium Earth Orbit). Finally, we prove the new algorithm of single satellite beam scanning is feasible in the rapid positioning through our theoretical analysis and simulation.

The study of rapid localization algorithm from beam scanning by single satellite based on neural network

“Time for space” was essential to the conventional algorithm of navigation and positioning by single satellite, but it will seriously affect the accuracy of single satellite in fast positioning. Based on the analysis of the principle of traditional single satellite location, in this paper, we briefly analyzed the advantages of single satellite beam scanning positioning based on neural network. Through theoretical analysis and simulation, we prove that the single satellite beam scanning is feasible in the rapid positioning. Finally, we analyzed the main influencing parameters of system accuracy and, as well, the performance of neural network is evaluated.

A design of high-gain Vivaldi antenna and its array research

In order to meet the request of ultra wideband (UWB) system to antenna, In this paper, a kind of Vivaldi antenna with ripple is designed, and its array is studied. Its working frequency band is from 400MHz to 900MHz, the gain of the antenna array unit in the low frequency band is 5.11dB, and 8.68dB in the high frequency band. In addition, we studied the antenna array respectively according to Dolph-chebyshef series distribution array of sequence distribution, the test results showed that Dolph-Chebyshef series distribution array can improve the gain of the antenna array and can reduce the side lobe level, the gain in the low frequency band can reach 26.7dB and gain at high frequency band to 28.4dB. The simulation results show that the array antenna has ideal gain effect and excellent radiation performance in the operating frequency band.