WANG Shuang,CHI Xue-fen,ZHAO Lin-lin,QIAN Lei.Demodulation algorithm with movement robustness for optical camera communications[J].Optoelectronics Letters,2019,15(6):449-453 Demodulation algorithm with movement robustness for optical camera communications Author Name Affiliation WANG Shuang  College of Communication Engineering, Jilin University, Changchun 130012, China  CHI Xue-fen  College of Communication Engineering, Jilin University, Changchun 130012, China  ZHAO Lin-lin  College of Communication Engineering, Jilin University, Changchun 130012, China  QIAN Lei  College of Communication Engineering, Jilin University, Changchun 130012, China  Abstract:       Due to the low sampling rate of the camera based receiver, the movement of communication devices becomes a factor that cannot be ignored in the demodulation of optical camera communications (OCC). In this paper, we propose the block matching demodulation (BMD) algorithm, which is a movement-robust and optical-interference-resistant demodulation method for OCC. The BMD algorithm can resist the movement of communication devices by locating communication light source per image and immunize optical interference by utilizing the fast time-varying characteristic of communication light source. Moreover, in order to enhance the reliability of communication systems, BMD algorithm and Manchester decoding are combined to realize error detection and correction without increasing the overhead of encoding. Finally, we build a practical mobile OCC system to test the performance of BMD algorithm. Experimental results show that the BMD algorithm can resist the movement of communication devices effectively and achieve reliable demodulation. Hits: 860 Download times: 0 View Full Text    Download reader