摘要
提高短距离无线通信的速率与精度,设计了基于脉冲宽度调制的可见光通信系统。向系统内输入待传输数据,由系统内发射模块的信号源接收此数据,并向调制单元发射其数字信号,调制单元结合脉冲宽度调制与脉冲振幅调制两部分,对该数字信号实施振幅与宽度调制,并向LED驱动器发送调制后信号,LED驱动器接收此调制信号,并驱动LED阵列以对应可见光信号传输该调制信号;由系统内接收模块的光电探测器检测到此可见光信号,转换成电压信号,并经放大与滤波处理后,传输至模数转换器转换该放大电压信号为数字信号,由解调单元解调该数字信号,得到原始传输数据输出,完成此待传输数据的短距离可见光无线通信。结果表明,该系统可实现不同形式数据信息的通信传输,平均传输比特率可达到67.031 Mbit/s,传输后所得数据几乎与原始数据吻合,数据的传输速率与传输精度均较高,实际应用效果理想,能够保障短距离无线通信的高速率与高精度。
The visible light communication system based on pulse width modulation is designed to improve the speed and accuracy of short distance wireless communication.To transmit data to the system input,the system module of signal receiving this data,and to launch its digital signal modulation unit,unit in combination with pulse width mod-ulation and pulse amplitude modulation(am)two parts,the amplitude and width modulation in the digital signal,and sends a modulated signal to the LED drive LED driver receives the modulation signal,And drive LED array to transmit the modulation signal corresponding to visible light signal;By the photoelectric detector to detect the receiving module is visible light signal and converted into voltage signal,and after amplifying and filtering processing,transfer to the AD converter convert the amplified voltage signal to digital signal,by the demodulation of the digital signal demodulation element,get the original output data transmission and complete the short distance optical wireless communication to transmit data.The results show that the system can realize the communication transmission of different forms of data in-formation,the average transmission bit rate can reach 67.031 Mbit/s,the data obtained after transmission is almost consistent with the original data,the data transmission rate and accuracy are high,the practical application effect is i-deal,can guarantee the high speed and high precision of short distance wireless communication.
作者
陈瑞霞
齐国红
CHEN Ruixia;QI Guohong(School of electronic information engineering,Zhengzhou SIAS University,Zhengzhou 451150,China)
出处
《激光杂志》
CAS
北大核心
2023年第5期112-117,共6页
Laser Journal
基金
河南省科技攻关项目(No.222102210282)
河南省科技厅项目(No.222102210122)。
关键词
脉冲宽度调制
可见光通信
发射模块
脉冲振幅调制
接收模块
光电探测器
pulse width modulation
visible light communication
launch module
pulse amplitude modulation
receiving module
photodetector
