246 research outputs found
A Simplified Multipath Component Modeling Approach for High-Speed Train Channel Based on Ray Tracing
Map-based Channel Modeling and Generation for U2V mmWave Communication
Unmanned aerial vehicle (UAV) aided millimeter wave (mmWave) technologies
have a promising prospect in the future communication networks. By considering
the factors of three-dimensional (3D) scattering space, 3D trajectory, and 3D
antenna array, a non-stationary channel model for UAV-to-vehicle (U2V) mmWave
communications is proposed. The computation and generation methods of channel
parameters including interpath and intra-path are analyzed in detail. The
inter-path parameters are calculated in a deterministic way, while the
parameters of intra-path rays are generated in a stochastic way. The
statistical properties are obtained by using a Gaussian mixture model (GMM) on
the massive ray tracing (RT) data. Then, a modified method of equal areas
(MMEA) is developed to generate the random intra-path variables. Meanwhile, to
reduce the complexity of RT method, the 3D propagation space is reconstructed
based on the user-defined digital map. The simulated and analyzed results show
that the proposed model and generation method can reproduce non-stationary U2V
channels in accord with U2V scenarios. The generated statistical properties are
consistent with the theoretical and measured ones as well
Methodologies for Future Vehicular Digital Twins
The role of wireless communications in various domains of intelligent
transportation systems is significant; it is evident that dependable message
exchange between nodes (cars, bikes, pedestrians, infrastructure, etc.) has to
be guaranteed to fulfill the stringent requirements for future transportation
systems. A precise site-specific digital twin is seen as a key enabler for the
cost-effective development and validation of future vehicular communication
systems. Furthermore, achieving a realistic digital twin for dependable
wireless communications requires accurate measurement, modeling, and emulation
of wireless communication channels. However, contemporary approaches in these
domains are not efficient enough to satisfy the foreseen needs. In this
position paper, we overview the current solutions, indicate their limitations,
and discuss the most prospective paths for future investigation.Comment: Submitted to IEEE Intelligent Transportation Systems Magazin
State-of-the-art assessment of 5G mmWave communications
Deliverable D2.1 del proyecto 5GWirelessMain objective of the European 5Gwireless project, which is part of the H2020 Marie Slodowska-
Curie ITN (Innovative Training Networks) program resides in the training and involvement of young
researchers in the elaboration of future mobile communication networks, focusing on innovative
wireless technologies, heterogeneous network architectures, new topologies (including ultra-dense
deployments), and appropriate tools. The present Document D2.1 is the first deliverable of Work-
Package 2 (WP2) that is specifically devoted to the modeling of the millimeter-wave (mmWave)
propagation channels, and development of appropriate mmWave beamforming and signal
processing techniques. Deliver D2.1 gives a state-of-the-art on the mmWave channel measurement,
characterization and modeling; existing antenna array technologies, channel estimation and
precoding algorithms; proposed deployment and networking techniques; some performance
studies; as well as a review on the evaluation and analysis toolsPostprint (published version
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