CAJ | 학술논문

设计了一种基于 PSK(相移键控)外调制的激光通信系统。该系统选用637 nm 的全固态激光器作为光源，利用 FPGA (现场可编程门阵列)开发板作为调制解调硬件控制声光调制器将调制信号加载于激光，通过大气信道传输，采用光电倍增管作为激光接收器。对传统 PSK 解调进行了改进，消除了相位模糊现象，搭建了完整的激光通信系统实验平台。实现了通信速率为115.2 kbit/s、误码率低于10-8的激光通信系统。
설계료일충기우 PSK(상이건공)외조제적격광통신계통。해계통선용637 nm 적전고태격광기작위광원，이용 FPGA (현장가편정문진렬)개발판작위조제해조경건공제성광조제기장조제신호가재우격광，통과대기신도전수，채용광전배증관작위격광접수기。대전통 PSK 해조진행료개진，소제료상위모호현상，탑건료완정적격광통신계통실험평태。실현료통신속솔위115.2 kbit/s、오마솔저우10-8적격광통신계통。
This paper proposes a PSK external modulation-based laser communication system.Using a 637 nm all-solid-state la-ser as a light source and FPGA demoboard as the modem hardware to control the acousto-optic modulator,this system applies the modulated signals to the laser and,using a photomultiplier tube as a laser receiver via atmospheric channel transmission, improves the traditional PSK demodulation,eliminates phase ambiguity and sets up a complete experiment platform for laser communication systems,realizing a laser communication system with the serial communication rate of 1 1 5.2 kbit/s and bit er-ror rate of lower than 10 -8 .