摘要
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。
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.
出处
《电子设计工程》
2011年第15期142-144,共3页
Electronic Design Engineering
关键词
调制
解调
激光通信
DPPM
modulation
demodulation
laser correspondence
DPPM
