Optical Camera Communications for IoT–Rolling-Shutter Based MIMO Scheme with Grouped LED Array Transmitter

In optical camera communications (OCC), the provision of both flicker-free illumination and high data rates are challenging issues, which can be addressed by utilizing the rolling-shutter (RS) property of the image sensors as the receiver (Rx). In this paper, we propose an RS-based multiple-input multiple-output OCC scheme for the Internet of things (IoT) application. A simplified design of multi-channel transmitter (Tx) using a 7.2 × 7.2 cm2 small 8 × 8 distributed light emitting diode (LED) array, based on grouping of LEDs, is proposed for flicker-free transmission. We carry out an experimental investigation of the indoor OCC system by employing a Raspberry Pi camera as the Rx, with RS capturing mode. Despite the small area of the display, flicker-free communication links within the range of 20–100 cm are established with data throughput of 960 to 120 bps sufficient for IoT. A method to extend link spans up to 1.8 m and the data throughput to 13.44 kbps using different configurations of multi-channel Tx is provided. The peak signal-to-noise ratio of ~14 and 16 dB and the rate of successfully received bits of 99.4 and 81% are measured for the shutter speeds of 200 and 800 µs for a link span of 1 m, respectively.

[1]  Trang Nguyen,et al.  Current Status and Performance Analysis of Optical Camera Communication Technologies for 5G Networks , 2017, IEEE Access.

[2]  Thomas D. C. Little,et al.  Impact of lighting requirements on VLC systems , 2013, IEEE Communications Magazine.

[3]  Gianluigi Liva,et al.  Improving the Decoding Threshold of Tailbiting Spatially Coupled LDPC Codes by Energy Shaping , 2018, IEEE Communications Letters.

[4]  Rajendran Parthiban,et al.  Dimming schemes for visible light communication: the state of research , 2015, IEEE Wireless Communications.

[5]  Yeon-Ho Chung,et al.  Wide receiver orientation using diffuse reflection in camera-based indoor visible light communication , 2019 .

[6]  LeNam Tuan,et al.  A survey of design and implementation for optical camera communication , 2017 .

[7]  Wei Huang,et al.  Design and implementation of a real-time CIM-MIMO optical camera communication system. , 2016, Optics express.

[8]  Shinichiro Haruyama.  Visible light communications , 2010, 36th European Conference and Exhibition on Optical Communication.

[9]  Yeong Min Jang,et al.  A survey of design and implementation for optical camera communication , 2017, Signal Process. Image Commun..

[10]  Mauro Biagi,et al.  Non-Line-of-Sight MIMO Space-Time Division Multiplexing Visible Light Optical Camera Communications , 2019, Journal of Lightwave Technology.

[11]  Mauro Conti,et al.  Advertising in the IoT Era: Vision and Challenges , 2018, IEEE Communications Magazine.

[12]  Zabih Ghassemlooy,et al.  Performance evaluation of neural network assisted motion detection schemes implemented within indoor optical camera based communications. , 2019, Optics express.

[13]  Soung Chang Liew,et al.  Outage-Limit-Approaching Channel Coding for Future Wireless Communications: Root-Protograph Low-Density Parity-Check Codes , 2019, IEEE Vehicular Technology Magazine.

[14]  Jun Luo,et al.  CeilingTalk: Lightweight Indoor Broadcast Through LED-Camera Communication , 2017, IEEE Transactions on Mobile Computing.

[15]  Robert W. Heath,et al.  Five disruptive technology directions for 5G , 2013, IEEE Communications Magazine.

[16]  Zabih Ghassemlooy,et al.  An Overview of Optical Wireless Communications , 2016 .

[17]  Mohsen Guizani,et al.  Internet of Things: A Survey on Enabling Technologies, Protocols, and Applications , 2015, IEEE Communications Surveys & Tutorials.

[18]  Mostafa Zaman Chowdhury,et al.  Smartphone Camera-Based Optical Wireless Communication System: Requirements and Implementation Challenges , 2019 .

[19]  Jaafar M. H. Elmirghani,et al.  Optical wireless communications , 2003, IEEE Communications Magazine.

[20]  Mauro Biagi,et al.  Space-time multichannel adaptive filtering scheme for VLC color cross-talk equalization. , 2018, Optics express.

[21]  Zhengyuan Xu,et al.  Some practical constraints and solutions for optical camera communication , 2020, Philosophical Transactions of the Royal Society A.

[22]  Huiling Jiang,et al.  Large scale massive MIMO field trial for 5G mobile communications system , 2016, 2016 International Symposium on Antennas and Propagation (ISAP).

[23]  S. Arnon,et al.  Short-Range Optical Wireless Communications , 2005 .

[24]  Zabih Ghassemlooy,et al.  The first tests of smartphone camera exposure effect on optical camera communication links , 2019, 2019 15th International Conference on Telecommunications (ConTEL).

[25]  Lih Chieh Png,et al.  Experimental Demonstration of RGB LED-Based Optical Camera Communications , 2015, IEEE Photonics Journal.

[26]  Mohammed Ghanbari,et al.  Scope of validity of PSNR in image/video quality assessment , 2008 .

[27]  Maria Fresia,et al.  5G systems: The mmMAGIC project perspective on use cases and challenges between 6-100 GHz , 2016, WCNC Workshops.

[28]  Wan-Young Chung,et al.  Multilevel Intensity-Modulation for Rolling Shutter-Based Optical Camera Communication , 2018, IEEE Photonics Technology Letters.

[29]  Chang-Jun Ahn,et al.  Mobile Phone Camera-Based Indoor Visible Light Communications With Rotation Compensation , 2016, IEEE Photonics Journal.

[30]  Joerg Robert,et al.  Interleaved Chirp Spreading LoRa-Based Modulation , 2019, IEEE Internet of Things Journal.

[31]  Yeong Min Jang,et al.  Optical-RoI-Signaling for Vehicular Communications , 2019, IEEE Access.

[32]  Yen-Ting Chen,et al.  Beacon Jointed Packet Reconstruction Scheme for Mobile-Phone Based Visible Light Communications Using Rolling Shutter , 2017, IEEE Photonics Journal.

[33]  Volker Jungnickel,et al.  Coexistence of WiFi and LiFi toward 5G: concepts, opportunities, and challenges , 2016, IEEE Communications Magazine.

[34]  Toshiaki Koike-Akino,et al.  High-Throughput Visual MIMO Systems for Screen-Camera Communications , 2020, IEEE Transactions on Mobile Computing.

[35]  Thithanhnhan Le,et al.  Performance of rolling shutter and global shutter camera in optical camera communications , 2015, 2015 International Conference on Information and Communication Technology Convergence (ICTC).

[36]  Mostafa Zaman Chowdhury,et al.  Performance Analysis and Improvement of Optical Camera Communication , 2018, Applied Sciences.