A high-power light-emitting diode (LED) panel-lamp connected in series with a low-complexity modulation circuit using metal–oxide–semiconductor field-effect transistor (MOSFET) is proposed for an indoor visible-light communication system. The MOSFET modulation circuit consists of a high-speed MOSFET and a shunt resistor, in which the MOSFET gives a variable load driven by the data bit stream and the shunt resistor can tune the modulation depth of the transmitter. In addition, only focusing optical lens is employed in the receiver but no collimation optical lens is adopted in the transmitter to increase the working area. Although the largest data rate is limited to 2 Mbps, the longitudinal communication distances is as long as 6 m; moreover, the maximum horizontal distance is up to 5 m (~ 78.5 m 2 in area) along with 3 m in longitudinal distance at the data rates of 1 Mbps. Compared with the traditional Bias-Tee configuration, the proposed MOSFET configuration leads to a lower data rate but a higher modulation depth as well as much larger working area. To the best of our knowledge, this is the largest working area at such a high data rate with on–off-keying using a single LED luminary without collimation optical lens. The system has the inherent ability to realize pulse amplitude modulation (PAM). The 4-PAM is demonstrated to double the data rates.

中文翻译：

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使用大功率 LED 面板灯和低复杂度 MOSFET 电路的可见光通信

提出了一种用于室内可见光通信系统的大功率发光二极管 (LED) 面板灯，该面板灯与使用金属氧化物半导体场效应晶体管 (MOSFET) 的低复杂度调制电路串联。MOSFET 调制电路由高速 MOSFET 和分流电阻组成，其中 MOSFET 提供由数据位流驱动的可变负载，分流电阻可以调整发射器的调制深度。另外，接收器仅采用聚焦光学透镜，发射器不采用准直光学透镜，以增加工作面积。虽然最大数据速率限制在2Mbps，但纵向通信距离长达6m；此外，最大水平距离可达 5 m (~ 78. 5 m 2 面积）以及 3 m 纵向距离，数据速率为 1 Mbps。与传统的 Bias-Tee 配置相比，所提出的 MOSFET 配置导致较低的数据速率但更高的调制深度以及更大的工作区域。据我们所知，这是在如此高的数据速率下最大的工作区域，使用无准直光学透镜的单个 LED 灯具进行开关键控。该系统具有实现脉冲幅度调制（PAM）的内在能力。4-PAM 被证明可以将数据速率加倍。这是在如此高的数据速率下最大的工作区域，使用无准直光学透镜的单个 LED 灯具进行开关键控。该系统具有实现脉冲幅度调制（PAM）的内在能力。4-PAM 被证明可以将数据速率加倍。这是在如此高的数据速率下最大的工作区域，使用无准直光学透镜的单个 LED 灯具进行开关键控。该系统具有实现脉冲幅度调制（PAM）的内在能力。4-PAM 被证明可以将数据速率加倍。