High Speed Parallel Transmission Visible Light Communication Method with Multiple LED Matrix Image Processing Technique

In this paper, we have studied a multi - LED matrix optical sensing technology for high speed transmission in a visible light communication system based on an optical camera CCD sensor. In order to improve transmission capacity in visible light communication, data must be transmitted from different LEDs at the same time and received. However, a system environment with multiple LEDs may cause interference between adjacent LEDs. Generally, since a visible light communication system generally uses a luminance modulation method, when a plurality of LEDs transmit data at the same time, it is difficult to accurately detect each LED due to light scattering interference of an adjacent LED. To solve this problem, we proposed a spatial filtering technique to group multiple LEDs and to reduce the interference of grouped LED matrix. We also propose a pixel image processing technique for detecting each LED. This technology accurately recognizes each matrix of LEDs in a multi-matrix LED environment and improves system performance by increasing the throughput of the MISO-OCVLC (Optical Camera Visible Light Communication) system.