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http://hdl.handle.net/10553/73839
Title: | Optical camera communications for iot–rolling-shutter based MIMO scheme with grouped LED array transmitter | Authors: | Teli, Shivani Rajendra Matus, Vicente Zvanovec, Stanislav Perez-Jimenez, Rafael Vitek, Stanislav Ghassemlooy, Zabih |
UNESCO Clasification: | 3325 Tecnología de las telecomunicaciones | Keywords: | Internet Of Things Light-Emitting Diodes Multiple-Input Multiple-Output Optical Camera Communications Rolling-Shutter Camera |
Issue Date: | 2020 | Journal: | Sensors | Abstract: | 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. | URI: | http://hdl.handle.net/10553/73839 | ISSN: | 1424-8220 | DOI: | 10.3390/s20123361 | Source: | Sensors (Switzerland) [ISSN 1424-8220], v. 20 (12), p. 1-15, (Junio 2020) |
Appears in Collections: | Artículos |
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