Research on the Performance of 2x2 MIMO Vehicle Visible Light Communication System

Abstract

In order to study the influence of the channel environment on the performance of the vehicle-mounted visible light communication system, the 2x2MIMO vehicle-mounted visible light channel spatial correlation model was established, and the influence of each parameter on the condition number of the channel matrix was analyzed. Then the spatial rectangular model of the 2x2MIMO vehicle-mounted visible light communication system was optimized. The received power of the direct path of the low beam and the high beam system and the diffuse reflection path of the ground and adjacent lanes was studied; through the Mie theory, and finally the number of different dust particles is simulated and analyzed the effect of density and channel correlation on system performance. The results show that: the relative speed and direction of motion have a large impact on the low beam and high beam systems respectively; the reflected power of the vehicle surface in the adjacent lane is greater than the ground reflected power; the number of dust particles has a greater impact on the transmission power than the wavelength; the high beam Compared with the low beam system channel capacity, the system channel capacity has increased by about $7.7\mathrm{x}10^{4}$(b/s). The performance of the vehicle-mounted visible light communication system increases with the decrease of the distance between the transmitting end and the distance between the receiving end, the offset of the transceiver end and the height difference.