CAJ | 학술논문

针对空间激光通信受大气信道湍流、闪烁等现象的影响而导致通信性能下降等问题，提出了一种光学多输入多输出（MIMO）技术，并建立了相应的仿真模型。首先通过分析选择最优的分集方式，并利用建立的仿真模型进行了不同数量发射光束对光强起伏的影响仿真，然后对采用相同的MIMO技术不同调制方式的通信系统进行仿真。仿真结果显示，随着发射光束的增加，光强起伏方差远小于单路发射，PPM调制方式性能优于OOK调制方式，结果表明MIMO系统性能相对单发单收系统有明显的改善，充分体现出MIMO系统的优越性。
침대공간격광통신수대기신도단류、섬삭등현상적영향이도치통신성능하강등문제，제출료일충광학다수입다수출（MIMO）기술，병건립료상응적방진모형。수선통과분석선택최우적분집방식，병이용건립적방진모형진행료불동수량발사광속대광강기복적영향방진，연후대채용상동적MIMO기술불동조제방식적통신계통진행방진。방진결과현시，수착발사광속적증가，광강기복방차원소우단로발사，PPM조제방식성능우우OOK조제방식，결과표명MIMO계통성능상대단발단수계통유명현적개선，충분체현출MIMO계통적우월성。
For some questions of space laser communication such as communication performance degradation caused by Atmospheric turbulence and scintillation,in this paper,a kind of communication technology named MIMO is presented and a simulation model is set up. Firstly, the best diversity is chosen through analyzing, and the influence on fluctua-tion is emulated because of different number emitter beam. And then the performance of laser communication system ad-opted different modulation modes is emulated. The simulation results with an increase in the beam emitted light intensity;fluctuation variance is much smaller than the single-channel transmitter;the performance of PPM modulation is super than that of OOK modulation.The simulation results show that the intensity fluctuation variance and modulation perfor-mance of MIMO system are better than single emitter and single reciver.