CAJ | 학술논문

基于逆向调制反射器(MRR)的空间光通信系统因其结构紧凑、可免去链路一端的捕跟(APT)系统、功耗低等优点，是空间光通信系统研究热点之一。提出采用双波长激光发射实现全双工逆向调制回复空间光通信结构，并基于该结构对强度调制解调模式，通信距离为300 km ，通信速率为1 GHz下的地面站对近地小卫星全双工通信链路进行了链路计算及通信误码率的分析。当MRR端口径为0.1 m时，通信链路余量大于5 dB ,通信误码率优于10-15，满足通信链路的要求。并进一步分析了仿真结果存在的缺陷。结果表明所提出的空间光通信结构在小卫星对地面站全双工激光通信是可行的，是未来空间光通信系统发展趋势之一。
기우역향조제반사기(MRR)적공간광통신계통인기결구긴주、가면거련로일단적포근(APT)계통、공모저등우점，시공간광통신계통연구열점지일。제출채용쌍파장격광발사실현전쌍공역향조제회복공간광통신결구，병기우해결구대강도조제해조모식，통신거리위300 km ，통신속솔위1 GHz하적지면참대근지소위성전쌍공통신련로진행료련로계산급통신오마솔적분석。당MRR단구경위0.1 m시，통신련로여량대우5 dB ,통신오마솔우우10-15，만족통신련로적요구。병진일보분석료방진결과존재적결함。결과표명소제출적공간광통신결구재소위성대지면참전쌍공격광통신시가행적，시미래공간광통신계통발전추세지일。
Free space optical communication based on modulating retro-reflector (MRR) is research hotspots of future wireless optical communication because of less power, compact structure and without Acquisition, Pointing and Tracking (APT) requirement at system based on MRR. Full-duplex free space laser communication system based on MRR and double-wavelength laser is proposed. The link budget between small satellite under low orbit and ground station and bit error rate (BER) of optical communication are calculated when Communication distance and rate are 300 km and 1 GHz. It can be found that the link budge is more than 5 dB, and BER is less than 10-15. The results show that the budge and BER meet the communication requirement. Then limitation of the emulation is also analyzed. In conclusion, the proposed system can be used between light-weight full-duplex laser communication of small satellite under low orbit and ground station. It may be one of the future development trends of space optical communication system.