Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7924822 | Optics Communications | 2018 | 6 Pages |
Abstract
In an image sensor-based visible-light communication, noise reduction is essential for improving the transmission performance because each frame contains received data with various types of noises. In this study, we demonstrate the structures of receive (Rx) and transmit (Tx) frames for optical camera communication (OCC) by using the rolling shutter effect of a complementary metal-oxide semiconductor (CMOS) image sensor. We propose and demonstrate a three-step noise-reduction process for each frame. The additive white Gaussian noise is reduced by using “signal averaging,” and the background noise is reduced via “adaptive window thresholding” with “normalization.” By using the proposed method, this system shows noise tolerance. We experimentally demonstrate an 8.55-kBd error-free optical camera transmission.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Joon-Woo Lee, Sung-Jin Kim, Sang-Kook Han,