白光LED照明与可见光通信技术相结合,构建基于白光LED的可见光无线通信系统。为解决近范围内(如飞机、医院、矿井等地)无线通信问题,基于可见光通信技术基本原理,利用白光LED的光源特性,提出了一种以通断键控(OOK)为调制方式技术和PIN管为光电探测器的可见光通信系统,用单片机AT89C51产生音乐信号且实现了在室内的传输,同时为了增强系统的通信性能,设计了LED光阵列,进行了相关的实验。通过实验表明:音乐信号能够通过白光LED可见光通信系统在室内的传输和播放,并且该系统能够满足近范围内的无线通信需求,系统中采用的ASK调制和解调技术相对简单,大大降低了系统成本和设计的复杂性。
White LED illumination combines with visible light communication technology,construct visible light wireless communication system based on white LED. In order to solve the near range( such as aircraft,hospital,mines and other places) wireless communication problems,based on the principle of visible light communication technology and characteristics of the white LED source,present a visible light communication system with on-off keying( OOK) modulation technique and PIN tube for optical power detector. MCU AT89C51 is used to produce music signal and music signal transmission is realized indoor,at the same time, in order to enhance communication performance of the system,LED optical array is designed,and related experiments are carried out.Experiments show that the music signal can transmit and broadcast through the white LED visible light communication system in interior,and the system can meet wireless communication demand in the near range,the ASK modulation and demodulation techniques used in the system are relatively simple,which greatly reduces cost of the system and complexity of design.