摘要
空间相干激光通信终端中的跟瞄(PAT)系统性能直接影响通信质量。在通用的相干接收机系统中加入CCD和图像处理软件,在对传输信号进行相干探测的同时可得到目标位置误差信息,实现发射光束的实时调整。给出了干涉场强的理论表达式以及图像参数与目标位置的关系式,并讨论了实际应用中波长抖动对位置误差探测精度的影响。通过计算机仿真,验证了目标位置相干探测原理以及波长扰动分析的正确性。
Pointing,acquisition and tracking （PAT） system is the key component in inter-satellite laser coherent communications. A novel method to coherent detection of position errors information is proposed. Based on the system composing,this method adds CCD and computer as position error detector. The position errors as the control signal of PAT subsystem drive the receiver telescope to keep tracking to the target. Theoretical deviation of the relation equation is given,and the analysis of the effect of the wavelength stability on the precision is presented. Finally the simulation results validate the method.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2010年第2期347-351,共5页
Acta Optica Sinica
基金
国家863计划(2007AA01Z298)资助课题
关键词
空间激光通信
相干探测
跟瞄系统
位置误差
space laser communications
coherent detection
pointing, acquisition and tracking （PAT） system
position error
