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中文摘要：
考虑晃动对平台间光通信的影响，结合Г大气扰动模型，推导出平台间光通信的误码率表达式，进一步分析平台晃动条件下平台间光通信捕获、跟踪和瞄准（APT）系统的设计要求。结果表明，发送端偏转和接收端的垂直运动对平台间光通信性能影响较大，而接收端偏转和发送端的水平运动对平台间光通信性能影响较小；满足平台间光通信误码率小于10^-6的APT系统瞄准精度应低于50μrad。
英文摘要：
A close-form expression for the bit error rate of inter-HAPs optical communication system under Г turbulence channel was deduced and the effect of platforms instability on system performance was analyzed. In order to reduce the BER, the acquisition, pointing and tracking（APT） system was adopted in the system. The design requirement of APT system under the condition of platforms instability was also analyzed. The results indicate that the roll of the transmitter and the vertical movement have significant effect on the performance of inter-HAP optical communication system,while the roll of the receiver and the horizontal movement have little effect on the performance of inter-HAP optical communication sys- tem,and the APT system with the sighting accuracy of 50 μrad can decrease the bit error rate to less than 10^-6.
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