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针对基于传统无线技术的V2V通信系统易产生广播风暴、电磁干扰以及电磁辐射等问题,设计并实现了一种基于车载LED的V2V通信方案。采用单片机为主要控制器,利用按键电路单元将交通信息简单快捷地编码成电信号,以车载LED发出的高速调制可见光作为信息载体,利用LED接收光载波信号,并通过指示灯、蜂鸣器和LCD显示电路单元完成声光报警以及文字信息显示,实现了交通信息的实时无线传输。实验结果表明,本文方案系统结构简单、操作方便、安全性好和抗电磁干扰能力强,在传输速率为0.2 Mbit/s和通信距离为30 m时,误码率(BER)小于10-5,有效地克服了传统无线通信技术的不足,是短距离无线通信技术很好的补充,具有很好的应用前景。
Aiming at the problems of easy to generate broadcast storm, electromagnetic interference and electromagnetic radiation in the V2V communication system based on the traditional wireless technology, a V2V communication scheme based on vehicle LED is designed and implemented. The use of SCM as the main controller, the use of key circuit unit will be simple and efficient traffic information encoded into electrical signals to the vehicle LED high-speed modulated visible light emitted as an information carrier, the use of LED light carrier signal received and through the light, buzzer and LCD display circuit unit to complete the sound and light alarm and text information display, to achieve real-time wireless traffic information transmission. The experimental results show that the proposed scheme has the advantages of simple structure, easy operation, good security and strong anti-electromagnetic interference ability. When the transmission rate is 0.2 Mbit / s and the communication distance is 30 m, the bit error rate (BER) is less than 10-5, Effectively overcome the shortcomings of the traditional wireless communication technology, is a good supplement to short-range wireless communication technology, and has good application prospects.