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设计并实现了激光发射与接收电路模块,每个模块主要由激光收发电路、数据处理器、存储器和视频转换电路等4部分组成,具有体积小、使用灵活的特点。重点介绍了622Mbit/s高速激光收发电路的设计。研究并实现了对视频数据流的时序控制,如有效图像数据的提取与重新组合、存储等,采用曼彻斯特编码保证了激光信号接收与时钟恢复的稳定。在使用一组简易光学天线的情况下,理论通信距离大于6km,并成功地完成了距离大于100m的实验。结果表明:该系统可以稳定地传输图像,适合地面短距离高速接入等应用,为进一步研究无线激光通信技术提供了实验平台。
Design and implementation of laser transmitter and receiver circuit module, each module consists of laser transceiver circuit, data processor, memory and video conversion circuit composed of 4 parts, with small size, flexible use of features. Highlights of the 622Mbit / s high-speed laser transceiver circuit design. It studies and realizes the timing control of the video data stream, such as the effective image data extraction and recombination, storage and so on. The Manchester encoding ensures the stability of laser signal reception and clock recovery. In the case of using a set of simple optical antennas, the theoretical communication distance is more than 6km and the experiment with the distance greater than 100m has been successfully completed. The results show that the system can transmit images stably and is suitable for short-distance high-speed access to ground. It provides an experimental platform for further research on wireless laser communication technology.