Abstract
Vehicle-to-everything (V2X) communication has been widely studied in recent years for the rapid development of the vehicular traffic. In this paper, a V2X communication system integrating the probabilistic shaping (PS) bitloading multi-input-multi-output (MIMO) visible light communication (VLC) and the millimeter wave radar is proposed. The PS bitloading algorithm utilizes the full spectrum resource of the LED headlights, and the MIMO configuration enhances the performance of the VLC system. Furthermore, the linear and nonlinear interpolation method makes it possible to calculate the SNR at every point from the SNR measured at several discrete calibration points. The SNR table enables the radar to guide the VLC according to the distance, achieving the highest achievable information rate (AIR) at every point. The system supports the V2X communication beyond 1.1 Gb/s up to 5 m. This is the first VLC based V2X sensing and communication system, and the AIR in the system is 1.8484 Gb/s. As far as we know, it is the highest data rate reported in the LED headlight based VLC system.
Highlights
As the mobility and vehicular transportation has developed rapidly, the vehicle-to-everything (V2X) communication has been widely developed
This paper proposed the V2X communication method based on the integration of probabilistic shaping (PS) bitloading multi-input-multi-output (MIMO) visible light communication (VLC) and radar, which is the first sensing and communication system based on VLC
To get a continuous signal-to-noise ratio (SNR) table which is available for every point within the range, an interpolation algorithm combining linear and nonlinear methods is proposed according to the light field distribution.The light field intensity of an LED is described with the illuminance, which is I (θ ) =
Summary
As the mobility and vehicular transportation has developed rapidly, the vehicle-to-everything (V2X) communication has been widely developed. For the transmission of real-time high-resolution raw images at 15 frames per second, a throughput higher than 700 Mbit/s is required, as suggested for the traffic safety services [8]. Up to 800 Mbit/s of data rate is required for the real-time vehicle safety based on camera and radar. Sci. 2020, 10, 6636 technology that supports such data rate enables the safety information exchange between vehicles and the other things. The system supports the data rate beyond 1.1 Gb/s with the distance up to 5 m, and the highest data rate of 1.8484 Gb/s, which is the highest data rate in VLC base V2X communication systems as far as we know
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