Results 31 to 40 of about 174,298 (206)

Performance evaluation of mobile U-navigation based on GPS/WLAN hybridization [PDF]

, 2012
This paper present our mobile u-navigation system. This approach utilizes hybridization of wireless local area network and Global Positioning System internal sensor which to receive signal strength from access point and the same time retrieve Global ...
Mohamad, Mohd. Murtadha, Rosly, Mohd. Adly, Sapri, Maimunah, Wan Bejuri, Wan Mohd. Yaakob   +3 more
core   +1 more source

GPS and property surveying [PDF]

, 2015
In 2010 the Global Positioning System (GPS) developed by the United States military was the best known Global Navigation Satellite System (GNSS). Others included Russia’s GLONASS, China’s COMPASS and Europe’s GALILEO systems.
Drummond, J.
core  

International Application of BeiDou Navigation Satellite System

中国工程科学, 2023
The international application of the BeiDou navigation satellite system (BDS) is a new requirement for BDS development in the new development stage; it is also significant for promoting the high-quality development of the Belt and Road, establishing a ...
Yang Changfeng , Yang Jun , Yang Junlin , Wang Jun , Li Zuohu   +4 more
doaj   +1 more source

Space–Ground Joint Support Method in Autonomous Orbit Determination of BeiDou Satellites

Remote Sensing
When relying exclusively on inter-satellite links for autonomous orbit determination, it cannot suppress or eliminate the constellation overall rotation, rendering it incapable of determining its spatial orientation relative to terrestrial and celestial ...
Xiaojie Li, Rui Guo, Guangyao Chen, Shanshi Zhou, Hai Sha, Qian Ma, Yingying Zhao, Lu Zhang, Shan Wu, Jinglei Guo, Ying Liu   +10 more
doaj   +1 more source

A research on low-earth-orbit signal-of-opportunity interference suppression algorithm based on adaptive signal iterative subspace projection technique

Frontiers in Physics
Signal-of-Opportunity (SOP) positioning based on Low-Earth-Orbit (LEO) constellations has gradually become a research hotspot. LEO satellite SOP positioning possess strong anti-jamming capabilities due to their large quantity, wide spectral coverage, and
Lihao Yao, Lihao Yao, Bin Fan, Honglei Qin, Deyong Xian, Boyun Gu, Hai Sha, Gangqiang Guan, Zhijun Liu, Donghan He, Liwei Zhang   +10 more
doaj   +1 more source

HPIPS: A High-Precision Indoor Pedestrian Positioning System Fusing WiFi-RTT, MEMS, and Map Information

Sensors, 2020
In order to solve the problem of pedestrian positioning in the indoor environment, this paper proposes a high-precision indoor pedestrian positioning system (HPIPS) based on smart phones.
Lu Huang, Baoguo Yu, Hongsheng Li, Heng Zhang, Shuang Li, Ruihui Zhu, Yaning Li   +6 more
doaj   +1 more source

Combination of Smartphone MEMS Sensors and Environmental Prior Information for Pedestrian Indoor Positioning

Sensors, 2020
In view of the inability of Global Navigation Satellite System (GNSS) to provide accurate indoor positioning services and the growing demand for location-based services, indoor positioning has become one of the most attractive research areas.
Lu Huang, Hongsheng Li, Baoguo Yu, Xingli Gan, Boyuan Wang, Yaning Li, Ruihui Zhu   +6 more
doaj   +1 more source

Overview of the system-level anti-jamming capability and developmental challenges of low-earth-orbit signal-of-opportunity

Frontiers in Physics
Signal-of-Opportunity (SOP) navigation based on Low-Earth-Orbit (LEO) satellite constellations has increasingly become a research hotspot. Due to the large number of LEO satellites, wide spectrum coverage, and strong signal power, LEO satellite Signal-of-
Lihao Yao, Lihao Yao, Bin Fan, Honglei Qin, Deyong Xian, Mengli Wang, Boyun Gu, Sumin Chen, Sumin Chen, Changhong Wang, Changhong Wang, Xuyu Wang, Jiemin Shen, Dongfang Jiang, Heng Wei, Haoyuan Yu, Bingjie Liu, Shuai Shao   +17 more
doaj   +1 more source

An Indoor DFEC Ranging Method for Homologous Base Station Based on GPS L1 and BeiDou B1 Signals

Sensors, 2020
High-precision navigation and positioning technology for indoor areas has become one of the research hotspots in the current navigation field. However, due to the complexity of the indoor environment, this technology direction is also one of the research
Heng Zhang, Shuguo Pan, Chuanzhen Sheng, Xingli Gan, Baoguo Yu, Lu Huang, Yaning Li   +6 more
doaj   +1 more source

An Improved Divergence-Free Hatch Filter Algorithm Toward Sub-Meter Train Positioning With GNSS Single- Frequency Observations Only

IEEE Access, 2020
Train positioning is the core function in the application of Global Navigation Satellite Systems (GNSS) in Railway Transportation. However, the use of the differential GPS (DGPS) along the Qinghai-Tibet Railway is expensive and difficult to maintain ...
Rui Tian, Xurong Dong
doaj   +1 more source