逆向调制阵列大气激光通信的误码率分析
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摘要
为研究逆向调制阵列对大气湍流的抑制作用,提高逆向调制大气激光通信质量。首先,建立了逆向调制阵列接收光束传输模型,分析了光束经大气传输到达逆向调制阵列的信噪比;然后,建立了逆向调制阵列反射光束在大气信道中的传输模型,推导了不同数目反射光束在接收端的光强概率分布模型,分析了在不同湍流环境下采用逆向调制阵列的激光通信误码率;最后,仿真分析了在中等大气湍流条件下传输距离为1 km时,采用三个逆向调制器组成的逆向调制阵列的通信误码率比单个逆向调制器降低4 d B。
In order to study the restrain effect of modulating retro-reflector array on atmosphere turbulence and improve the communication quality of atmosphere laser communication system,a transmitting model of modulating retro-reflector array receive beam is established. The signal-to-noise ratio( SNR) of the beam transmitting through the atmosphere to the modulating retro-reflector array is analyzed; A transmitting model of modulating retro-reflector array reflection beams in the atmosphere channel is established. The intensity probability distribution model with different number of reflection beams at receiving end is derived. The bit error rate( BER) of the atmosphere laser communication system based on modulating retro-reflector array under different turbulent environments is analyzed and simulated. The simulated results show that under the condition of medium atmospheric turbulence,the BER of the modulating retro-reflector array consisting of three modulating retro-reflectors is 4 d B lower than a single modulating retro-reflector when the transmission distance is 1 km.
In order to study the restrain effect of modulating retro-reflector array on atmosphere turbulence and improve the communication quality of atmosphere laser communication system,a transmitting model of modulating retro-reflector array receive beam is established. The signal-to-noise ratio( SNR) of the beam transmitting through the atmosphere to the modulating retro-reflector array is analyzed; A transmitting model of modulating retro-reflector array reflection beams in the atmosphere channel is established. The intensity probability distribution model with different number of reflection beams at receiving end is derived. The bit error rate( BER) of the atmosphere laser communication system based on modulating retro-reflector array under different turbulent environments is analyzed and simulated. The simulated results show that under the condition of medium atmospheric turbulence,the BER of the modulating retro-reflector array consisting of three modulating retro-reflectors is 4 d B lower than a single modulating retro-reflector when the transmission distance is 1 km.
引文
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[2]REN Jianying,SUN Huayan,ZHAO Yanzhong,et al.Analysis on distance and BER of modulating retro-reflector laser communication[J].Laser&Infrared,2016,46(10):1206-1210.(in Chinese)任建迎,孙华燕,赵延仲,等.逆向调制激光通信作用距离及误码率分析[J].激光与红外,2016,46(10):1206-1210.
[3]Plett M,Rabinovich W S,Mahon R,et al.Free-space optical communication link across 16 kilometers over the Chesapeake Bay to a modulated retroreflector array[J].Optical Engineering,2008,47(4):40-44.
[4]Andrews L C,Phillips R L.Impact of scintillation on laser communication systems:recent advances in modeling[C]//International Symposium on Optical Science and Technology.International Society for Optics and Photonics,2002:23-34.
[5]WEI Zhenyan,CHEN Hui.Design of received aperture in wireless optical communication based on aperture averaging effect[J].Electronic Design Engineering,2010,18(4):55-57.(in Chinese)韦珍艳,陈辉.基于孔径平滑效应的无线光通信接收孔径的设计[J].电子设计工程,2010,18(4):55-57.
[6]WANG Defei,WANG Pujun,ZHAO Zhigang,et al.Performance study of laser communication system adopting multiple receivers through atmospheric turbulence[J].Laser&Infrared,2014,44(1):12-16.(in Chinese)王德飞,王朴军,赵志刚,等.基于阵列接收机的大气激光通信系统性能研究[J].激光与红外,2014,44(1):12-16.
[7]MA Dongtang.Study on Multiple-beam transmission and reception techniques for atmospheric laser communication[D].Changsha:National University of Defense Technology,2004.(in Chinese)马东堂.大气激光通信中的多光束发射和接收技术研究[D].长沙:国防科学技术大学,2004.
[8]WANG Jiangan,ZHAO Yingjun,CHEN Dong,et al.Performance study of laser communication system adopting multiple receivers through atmospheric turbulence[J].Infrared and Laser Engineering,2009,38(4):655-659.(in Chinese)王江安,赵英俊,陈冬,等.湍流尺度对大气激光通信系统误码率的影响[J].红外与激光工程,2009,38(4):655-659.