CAJ | 학술논문

调制与解调是大气激光通信中的一项关键技术。为了进一步提高传输通道抗干扰能力,在大气激光通信系统提出了脉冲位置调制（PPM）技术,它具有较强的抗干扰能力,能够很好地满足信号传输要求。通过对脉冲位置调制原理的分析,提出了一种基于PPM调制解调的改进方法——差分脉神位置调制（DPPM）,使用QuartusII 8.1软件,编写verilog代码,经过反复调试和实验,验证了设计的可行性。
조제여해조시대기격광통신중적일항관건기술。위료진일보제고전수통도항간우능력,재대기격광통신계통제출료맥충위치조제（PPM）기술,타구유교강적항간우능력,능구흔호지만족신호전수요구。통과대맥충위치조제원리적분석,제출료일충기우PPM조제해조적개진방법——차분맥신위치조제（DPPM）,사용QuartusII 8.1연건,편사verilog대마,경과반복조시화실험,험증료설계적가행성。
Modulation and demodulation are key technologies of atmospheric laser correspondence.In order to further improve the anti-interference ability of transmission channel,the technology of pulse position modulation（PPM） is proposed in the Atmospheric laser communication systems.The PPM technology has strong anti-interference ability which satisfies the requirements of signal transmission.By analyzing the principles of PPM,an improved method of modulation and demodulation based on PPM-differential pulse position modulation（DPPM） is proposed.With the use of QuartusII 8.1 software and verilog code,after repeated testing and experiments,the feasibility of the design is verified.