摘要
设计了基于声光频移技术的激光通信系统接收端系统,针对声光频移激光通信传输信号特点,利用LC谐振回路实现模拟选频,采用D触发器实现载波的数字下变频,最终通过现场可编程门阵列实现信号解调。最后对设计的模块进行测试,测试结果符合设计要求,实现了100MHz载波幅移键控信号的下变频以及基带信号的解调。
A receiver of the laser communication system based on the acoustic-optic frequency-shift technology has been designed.With consideration of the spectrum characteristics of the transmitting signal,LC resonant circuit had been used to achieve the frequency selection and the digital down conversion had also been accomplished with the application of the D flip-flop.Furthermore,the signal demodulation was completed by FPGA.Verification test had been taken and the results met the design requirement,realizing the down conversion for the ASK signal with the centre frequency of 100 MHz and the base band signal demodulated.
出处
《光电子技术》
CAS
北大核心
2012年第1期15-18,共4页
Optoelectronic Technology
