CAJ | 학술논문

由于光器件的发展，改进常规光无线信息交换系统，实现高速率的光无线通信研究得到了越来越多的关注；设计了一套基于声光效应的无线激光DQPSK调制系统，搭建了预编码电路，利用声光调制器进行实验方案验证，测试了码元速率2Mbit／s下调制信号的动态特性，对其进行了频谱分析；结果表明：在高码元速率下，该设计系统信噪比高，可应用于需要高的传输速率和高可靠性的无线激光通信系统中。
유우광기건적발전，개진상규광무선신식교환계통，실현고속솔적광무선통신연구득도료월래월다적관주；설계료일투기우성광효응적무선격광DQPSK조제계통，탑건료예편마전로，이용성광조제기진행실험방안험증，측시료마원속솔2Mbit／s하조제신호적동태특성，대기진행료빈보분석；결과표명：재고마원속솔하，해설계계통신조비고，가응용우수요고적전수속솔화고가고성적무선격광통신계통중。
The state of development of optical devices has led to increased interest in high data rate wireless optical communication schemes that constitute a viable alternative to conventional wireless technologies for information exchange.In this paper,a DQPSK modulation system,based on acoustic-optic effect,has been designed for wireless laser communication,a precoding circuit has been arranged,the modulation scheme was implemented and demonstrated with a acoustic-optic modulator,the transient data and spectrum of the modulated light signal was tested and investigated at a data rate of 2Mbit/s and the outcome shows that the modulation system has a high SNR at a high data rate.The deigned scheme was quite suitable for wireless laser communication system which needs high operation frequency and reliability.