Delay and Doppler Spreads of Non-Stationary Vehicular Channels for Safety Relevant Scenarios

Abstract

Vehicular communication channels are characterized by a non-stationary time- and frequency-selective fading process due to rapid changes in the environment. The non-stationary fading process can be characterized by assuming local stationarity for a region with finite extent in time and frequency. For this finite region the wide-sense stationarity and uncorrelated-scattering (WSSUS) assumption holds approximately and we are able to calculate a time and frequency dependent local scattering function (LSF). In this paper, we estimate the LSF from a large set of measurements collected in the DRIVEWAY'09 measurement campaign, which focuses on scenarios for intelligent transportation systems. We then obtain the time-frequency-varying power delay profile (PDP) and the time-frequency-varying Doppler power spectral density (DSD) from the LSF. Based on the PDP and the DSD, we analyze the time-frequency-varying root mean square (RMS) delay spread and the RMS Doppler spread. We show that the distribution of these channel parameters follows a bi-modal Gaussian mixture distribution. High RMS delay spread values are observed in situations with rich scattering, while high RMS Doppler spreads are obtained in drive-by scenarios.

18 pages, 5 figures, submitted to IEEE Transactions on Vehicular Communications for possible publication

Cited by in corpus (16)

• Toward Intelligent Vehicular Networks: A Machine Learning Framework
• Vehicular Communications: Survey and Challenges of Channel and Propagation Models
• Geometry-Based Vehicle-to-Vehicle Channel Modeling for Large-Scale Simulation
• Simulation and Measurement Based Vehicle-to-Vehicle Channel Characterization: Accuracy and Constraint Analysis
• Time- and Frequency-Varying $K$-Factor of Non-Stationary Vehicular Channels for Safety Relevant Scenarios
• Nested Sparse Approximation: Structured Estimation of V2V Channels Using Geometry-Based Stochastic Channel Model
• Low-Complexity Equalization for Orthogonal Time and Frequency Signaling (OTFS)
• Tracking of Wideband Multipath Components in a Vehicular Communication Scenario
• Measurement-Based Wideband Analysis of Dynamic Multipath Propagation in Vehicular Communication Scenarios
• Stationarity Evaluation of High-mobility sub-6 GHz and mmWave non-WSSUS Channels
• Time-Varying Rician K-factor in Measured Vehicular Channels at cmWave and mmWave Bands
• Mobile Positioning in Multipath Environments: a Pseudo Maximum Likelihood approach
• Vehicular Communications: A Physical Layer Perspective
• Multi-Node Vehicular Wireless Channels: Measurements, Large Vehicle Modelling, and Hardware-in-the-Loop Evaluation
• Doppler Spectrum Analysis of a Roadside Scatterer Model for Vehicle-to-Vehicle Channels: An Indirect Method
• Towards Cell-Free Massive MIMO: A Measurement-Based Analysis