Advanced Technologies for Position and Navigation under GNSS Signal Challenging or Denied Environments

Dear Colleagues,

Currently, with the popularity of smart devices, assured Position Navigation and Time (PNT) is critical for these devices and some fundamental infrastructures, i.e., power grid. The Global Navigation Satellite System (GNSS) is dominant in providing the PNT information due to its coverage and high accuracy. However, its signals are weak and it is vulnerable; multipath and None-Line-Of-Signals (NLOS) are the major errors that occur with regard to the GNSS in applications in urban areas. Advance signal processing methods are expected to improve its resilience and assurance. In addition, the GNSS is fragile to interference and spoofing, which should be emphasized for unmanned systems and smart devices.

Apart from improving the GNSS resilience in signal-challenging environments, the PNT without GNSS is critical for many applications—i.e., indoors, tunnels, underground, etc. Advanced technologies on high-accuracy inertial sensors and timing devices—i.e., MEMS Gyroscope, atomic interferometer gyroscope, nuclear magnetic resonance gyroscope, chip scale atomic clock, etc.—are the key to supporting PNT in GNSS-denied environments. Multisensor integration is also a prospective solution. This Special Issue aims to provide a platform for researchers to publish innovative work on the advanced technologies for position and navigation under GNSS signal-challenging or denied environments. Specifically, we invite contributions concerning the following topics:

1. GNSS multipath and NLOS identification, mitigation or correction;
2. Weak GNSS signal tracking and position determination;
3. GNSS interference and spoofing detection;
4. LiDAR/Visual SLAM;
5. MEMS inertial measurement unit;
6. Atomic Interferometer Gyroscope and Accelerometer;
7. Indoor position;
8. Multi-sensor integration and fusion;
9. Micro-Technology for Positioning, Navigation, and Timing.

Dr. Changhui Jiang
Dr. Yuwei Chen
Dr. Qian Meng
Dr. Panlong Wu
Dr. Bing Xu
Dr. Lianwu Guan
Dr. Wang Gao
Dr. Zeyu Li
Guest Editors

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