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为了实现多LED紫外光通信系统,首先介绍了紫外光通信系统的理论知识,设计的发送端能采用直流驱动紫外光LED为光源,接收端采用滤光片和光电倍增管实现光电检测,详细介绍了紫外光通信系统相关电路的原理和设计方案,在不同条件下对系统进行了实验测试,并对通信距离和误码率进行了分析,随着LED个数及LED供电电流的增加,紫外光通信的传输距离增加,并且误码率减低,使得紫外光通信系统的性能得到了提高。结果表明:系统可以满足近距离无线紫外光通信在角度对准、空分复用及方便组网等方面的需求。
In order to achieve multi-LED ultraviolet communication system, first introduced the theoretical knowledge of UV communication system, the design of the transmitter can use DC-driven UV LED as the light source, the receiving end of the filter and photomultiplier tube photoelectric detection, detailed description The principle and design scheme of the circuit related to the UV communication system are given. The system is tested under different conditions and the communication distance and bit error rate are analyzed. With the increase of LED number and LED supply current, UV light The transmission distance of the communication is increased, and the bit error rate is reduced, making the performance of the ultraviolet communication system improved. The results show that the system can meet the needs of near-field wireless UV communication in terms of angle alignment, space division multiplexing and convenient networking.