Research on Improving Anti-stroboscopic Coding in Visible Light Communication
In order to solve the discomfort caused by LED stroboscopic in visible light communication,an improved anti-stroboscopic method based on Manchester coding is proposed,and a platform is built to verify its feasibility.Record the flicker phenomenon before and after encoding using a high-speed camera,and randomly capture 550 frames of data.Use Matlab to analyze the grayscale comparison of each frame image.The experiment shows that the average grayscale of the frame image before encoding exhibits sharp fluctuations in a burr like manner between 55 and 70,while the value stabilizes between 60 and 65 after encoding.The degree of homogenization of the grayscale value of the video frame is much better than the grayscale value curve before encoding.After the improved encoding increases the transmission rate to 2Kbps,even when observed under the camera,there will be no LED flicker phenomenon,thus verifying the effectiveness of this scheme.
LED visible light communicationlow flash frequencyManchester Code
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