无线激光图像传输收发电路的设计与实现

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622 Mbit/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6 km,并成功地完成了距离大于100 m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 transmitting and receiving circuits in image transmission of wireless laser

Laser transmitting and receiving circuit modules mainly consisting of laser transmitting/ receiving circuit, data processor, memory and video invert circuit, were designed and implemented.The modules are small in dimension and flexible in usage. The design of 622 Mbit/s high speed laser transmitting/receiving circuit was mainly studied. The control on video data flow such as the extraction, reconstruction and storage of effective image data was researched and realized. Moreover, Manchester code was employed to guarantee the stability of signal receiving and clock data recovery (CDR). A theoretical communication distance of more than 6 km was obtained with a pair of simple optical antennas. Experiments under distance of more than 100 m were conducted successfully. Results show that the transmission system designed in this paper is able to transmit and receive image data stably and suitable for high speed access application on the ground. It also provides an experimental platform for further research on wireless laser communication.