A5014910983- Millimeter-Wave Propagation and Modeling
- Advanced MIMO Systems Optimization
- Power Line Communications and Noise
- Antenna Design and Analysis
- Railway Systems and Energy Efficiency
- Satellite Communication Systems
- Network Traffic and Congestion Control
- UAV Applications and Optimization
- Vehicular Ad Hoc Networks (VANETs)
- Telecommunications and Broadcasting Technologies
- Opportunistic and Delay-Tolerant Networks
China Academy of Railway Sciences
2020-2024
Coordinated multipoint (CoMP) and massive multiple-input multiple-output (mMIMO) are two of promising technologies in future intelligent high-speed railway (HSR) communication systems, whose performance is fundamentally determined by the characteristics cooperative mMIMO channels. This article proposes a dynamic three-dimensional (3-D) wideband geometry-based stochastic model (GBSM) for HSR The proposed GBSM employs sphere elliptic-cylinder models to describe common uncommon clusters...
Fifth generation new radio vehicle-to-everything (5G-V2X) communication is an emerging technology to support advanced use cases and higher automation levels in Internet of Vehicles. A comprehensive accurate knowledge narrow-beam channels plays a crucial role the utilization 5G-V2X technique. This paper focuses on measurement characterization vehicle-to-infrastructure (V2I) channel. flexible channel system using phased-array antenna designed, employed perform series 3.35 GHz measurements with...
Train Control system as the nerve of railway has attracted significant attention from both academia and industries since it is closely related to safety, especially in High-speed railway(HSR). To be line with research 5G network for (5G-R), which a topic common concern railways around world, performance 5G-R bearing train control information needs studied ensure high-quality transmission. In this article, train-ground communication demand deeply analyzed, three scientific questions are...
Accurate knowledge of non-stationary narrow-beam channel characteristics is the prerequisite applying dynamic beamforming technology in high-mobility communication scenarios. This paper proposes a three-dimensional geometry-based stochastic model (GBSM) for channels In proposed GBSM, impact antenna pattern on angular distribution and birth-death process clusters space-time-frequency (STF) domain are considered. Statistical properties derived, including STF correlation function multi-link...
Compared with railway communication service requirements on the mainline, in hotspots such as stations and yards are more complicated terms of types well bandwidth, which railway-dedicated mobile systems 5G-R facilitated dedicated frequency support cannot meet entire requirements. Therefore, other radio-communication technologies need to be adopted a supplement, among mmWave system is promising technology, especially for large bandwidth between train trackside. However, there lack evaluation...
Railway communication is undergoing a transitional period worldwide, and 5G for railway (5G-R), which has been adopted by the International Union (UIC) in China many other countries, common concern all over world. The 2100 MHz frequency band, ranks among top three mainstream bands public network deployment globally, recently issued MIIT 5G-R trial China, fairly close to band of 1900 Europe. Propagation study communication, especially mainline, most widely used scenario, great importance,...
Abstract When ground communication infrastructure within a region cannot be used for some reason, deploying unmanned aerial vehicle (UAV)‐mounted base stations is undoubtedly the most effective way to provide services. This paper investigates problem of joint deployment and power allocation multiple UAVs, where terminals (GTs) seek maximize quality experience (QoE). In mixed line‐of‐sight non‐line‐of‐sight environment, UAVs need change position in order collect channel information until...