Abstract
This paper reports the results of a car-following measurement of the wireless propagation channel at 5.9 GHz on a seriously congested urban road in Wuhan, China. The small-scale amplitude-fading distribution was determined to be a Ricean distribution using the Akaike information criterion. This result shows that this car-following scenario can be regarded as a line-of-sight radio channel. Moreover, the statistical K-factor features follow a Gaussian distribution. According to the power delay profile and average power delay profile, we found that street buildings in this dense urban environment contributed to very strong reflection phenomena. The impact of a powerful reflection is analyzed through path loss, delay, and Doppler spreads in the channel statistical properties. In the frequency domain, we observe a U-shape delay-Doppler spectrum that proved that the dense urban scenario consists of scattering channels. All these results are summarized in tabular form that will be useful in the modeling of vehicle-to-vehicle wireless communication systems.
Highlights
As mobile communications and wireless Internet technology continue to develop, the combination of smart phones and wireless broadband has greatly facilitated our life
Our test system is powered by an uninterruptible power supply and uses a CSGPS-38BH global positioning system (GPS) connected to the channel sounder
RMS error (RMSE); grey relational grade and mean absolute percentage error (GRG-MAPE), which is based on grey system theory; and the Pearson correlation coefficient and mean absolute percentage error (PCC-MAPE) were used to select the path loss model that best matches the measured data [34, 35]
Summary
As mobile communications and wireless Internet technology continue to develop, the combination of smart phones and wireless broadband has greatly facilitated our life. There is a lack of sufficient V2X channel measurements in Asian areas, where the population density, vehicles, and layout of the streets and buildings are different from those of Europe and American cities (e.g., in the congestion scenario in this study, vehicle speeds are around 0–5 m/s, which is much slower than those in [18], which are 4.2–8.3 m/s). To fill these gaps, this study carried out a car-following V2V measurement at 5.9 GHz on a seriously congested dense urban road in Wuhan, China.
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