SUN Yufeng,SHI Wenxiao,SHAO Xinrui,LIU Wei,LIU Anqi.Implementation and decoding method of OCC system based on MIMO[J].Optoelectronics Letters,2022,(1):18-23 Implementation and decoding method of OCC system based on MIMO Author Name Affiliation SUN Yufeng  Department of Communications Engineering, Jilin University, Changchun 130012, China  SHI Wenxiao  Department of Communications Engineering, Jilin University, Changchun 130012, China  SHAO Xinrui  Department of Communications Engineering, Jilin University, Changchun 130012, China  LIU Wei  Department of Communications Engineering, Jilin University, Changchun 130012, China  LIU Anqi  Department of Communications Engineering, Jilin University, Changchun 130012, China  Abstract:       The application of high-frame-rate cameras as well as the complex image processing techniques will lead to a series of problems, such as high system cost and long transmission delay. In this paper, we introduce narrow-band filtering technology to reduce the impact of optical noise and reduce the complexity of image processing from the physical level. We also introduce multiple-input multiple-output (MIMO) technology into the optical camera communication (OCC) system to increase system transmission rate, and propose a light emitting diode (LED) array decoding algorithm based on the directional projection method to reduce the system delay. By accumulating the target pixel values in each row and column of the image, the proposed method then determines the position and boundary of the detected target to distinguish the target area from the background. Experimental results indicate that the communication distance can reach up to 5.5 m without error bits detected. When the LED array at the transmitter of this system flashes at a frequency of 12 Hz, the transmission rate can reach 126.32 bit/s. Hits: 372 Download times: 6 View Full Text    Download reader