Visible Light Communication System Using Silicon Photocell for Energy Gathering and Data Receiving

Abstract

Silicon photocell acts as the detector and energy convertor in the VLC system. The system model was set up and simulated in Matlab/Simulink environment. A 10 Hz square wave was modulated on LED and restored in voltage mode at the receiver. An energy gathering and signal detecting system was demonstrated at the baud rate of 19200, and the DC signal is about 2.77 V and AC signal is around 410 mV.

Penerapan Modul Surya sebagai Receiver Sistem Visible Light Communication (VLC) untuk Pengiriman Sinyal Audio

“…Penggunaan photocell silikon sebagai receiver dan pengumpul energi juga telah dilakukan dengan bantuan simulasi menggunakan matlab pada penelitian [15]. Hasil simulasi menunjukkan bahwa saat photocell silikon berfungsi sebagai pengumpul energi dan pendeteksi sinyal secara bersamaan, kecepatan data yang dihasilkan maksimal sebesar 19,2 kb/s dengan tegangan photocell sebesar 2,77 Volt.…”

“…Berdasarkan Gambar 7, persamaan modul surya yang digunakan ditunjukkan oleh persamaan (5) [15] sebagai berikut :…”

Toward self-powered and reliable visible light communication using amorphous silicon thin-film solar cells

“…Moreover, it is expected to support large-scale deployments of low-power consuming devices by employing existing energy-efficient lighting infrastructures (i.e., light emitting diodes (LEDs)) as light sources for simultaneous illumination and high-speed wireless data transmission [3]. Driven by the rapid escalation of energy-saving requirements, solar cells with the dual functions of energy harvesting and data acquisition are appealing as alternatives to commonly used detectors (i.e., positive-intrinsic-negative diodes and avalanche photodiodes) [3][4][5][6][7][8][9][10][11]. They are widely recognized as the key components of future self-powered IoT devices such as wearables, smart homes, smart transportation systems, and long-term environmental monitoring equipment with millions of sensors [3].…”

“…They are widely recognized as the key components of future self-powered IoT devices such as wearables, smart homes, smart transportation systems, and long-term environmental monitoring equipment with millions of sensors [3]. However, the energy-efficient VLC technologies based on LEDs and solar cells are still in their infancy [4][5][6][7][8]. As most related works have focused on improving data rates (~Mb/s), transmission distances are still limited to ~cm, which ascribes to the low power density of LEDs and the low absorption coefficient of the used crystalline silicon (Si) solar cells [4][5][6][7].…”

“…Employing a white-light laser, we achieve a 20-m long-distance illumination and VLC with a data rate of 1 Mb/s in the air. Compared with organic, polycrystalline Si, or monocrystalline Si solar cells employed in the prior work [3][4][5][6][7][8][9], a-Si thin-film solar cells with the superiority in weak-light detection show excellent performance in long-distance VLC. White-light lasers are also proved to be good candidates of white-light LEDs to implement simultaneous long-distance lighting and highspeed VLC in the future thanks to their better collimation, higher bandwidth and higher power intensity.…”