基于二进制频率转移键调制的可见光通信系统的实验演示:朝着提高噪声弹性迈出了一步
Cătălin Beguni1,2, Adrian Done2, Alin-Mihai Căilean1,2,3
1Integrated Center for Research, Development and Innovation in Advanced Materials, Nanotechnologies and Distributed Systems for Fabrication and Control, Stefan cel Mare University of Suceava, 720229 Suceava, Romania.
Sensors (Basel, Switzerland)
|June 10, 2023
概括
使用二进制频率转移键化 (BFSK) 调制的可见光通信 (VLC) 与开关键化 (OOK) 相比,提供了更好的光学噪声弹性. 这一进步在各种环境中提高了无线通信的可靠性.
科学领域:
- 光学无线通信的无线通信.
- 对于通信的信号处理.
背景情况:
- 可见光通信 (VLC) 是一种新兴的无线技术,在交通安全和室内定位方面具有潜在的应用.
- 无线电频率 (RF) 技术在某些环境中存在局限性,因此需要像VLC这样的替代解决方案.
- 提高光学噪声免疫力是可靠的VLC系统面临的关键挑战.
研究的目的:
- 提出和评估一个VLC原型,使用二进制频率转移键化 (BFSK) 调制和非返回零 (NRZ) 编码.
- 为了比较拟议的BFSK-VLC系统与标准的开关键 (OOK) VLC系统的抗噪能力.
- 在光学噪声免疫方面量化性能改进.
主要方法:
- 开发一个采用BFSK调制和NRZ编码的原型VLC系统.
- 在不同光照射下,BFSK-VLC系统与OOK-VLC系统的实验比较.
- 测量两种系统都能维持的最大噪声辐射水平.
主要成果:
- 在BFSK-VLC系统下,在直接的白灯光照射下,光学噪声耐受性得到了25%的改善.
- BFSK-VLC的最大噪声辐射值为3500μW/cm2,而OOK.的最大噪声辐射值为2800μW/cm2.
- 在间接暴露中观察到近20%的改善,BFSK-VLC处理了65,000μW/cm2与OOK.的54,000μW/cm2相比.
结论:
- 视频控制系统,特别是具有BFSK调制和适当设计的VLC系统,对光学噪声具有显著的弹性.
- 拟议的BFSK-VLC系统为噪音较大的光学环境中的无线通信提供了更强大的解决方案.
- 这些发现支持VLC的可行性,用于在光学干扰存在时需要高可靠性的应用.
相关概念视频
Design Example
348
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
348
Propagation Speed of Electromagnetic Waves
3.5K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
3.5K
Intensity Of Electromagnetic Waves
4.6K
The energy transport per unit area per unit time, or the Poynting vector, gives the energy flux of an electromagnetic wave at any specific time. For a plane electromagnetic wave with E0 and B0 as the peak electric and magnetic fields and traveling along the x-axis, the time-varying energy flux can be given by the following equation:
4.6K
Power Factor Correction
216
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
216
Generating Electromagnetic Radiations
3.1K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
3.1K
Energy Stored In A Coaxial Cable
1.6K
A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic...
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic...
1.6K


