CAJ | 학술논문

在建立高空平台位置不稳定性模型的基础上，推导PPM调制的光链路误符号率，分析平台位置不稳定性的三种运动方式对平台间误符号率的影响。仿真结果表明：平台转动角度对于光链路的影响最大；平台间距离的变化对于链路的影响最小。并且增加发射功率能够在一定程度上缓解平台位置不稳定性对光链路的影响；较宽的光束发散角对于HAP的不稳定性具有很好的适应性。在仿真条件下，当发散角大于20μrad时，误符号率的变化不是很明显。
재건립고공평태위치불은정성모형적기출상，추도PPM조제적광련로오부호솔，분석평태위치불은정성적삼충운동방식대평태간오부호솔적영향。방진결과표명：평태전동각도대우광련로적영향최대；평태간거리적변화대우련로적영향최소。병차증가발사공솔능구재일정정도상완해평태위치불은정성대광련로적영향；교관적광속발산각대우HAP적불은정성구유흔호적괄응성。재방진조건하，당발산각대우20μrad시，오부호솔적변화불시흔명현。
Based on the model of high altitude platforms position instability, the symbol error probability of PPM on inter-platforms optical links was derived. Based on the symbol error probability, the effect of three moving modes due to high altitude platforms position instability on the performance of inter-platforms was analyzed. The simulation results show that platforms rotation has the greatest influence on inter-platforms optical links, and the changing of inter-platforms distance has the lowest influence on inter-platforms optical links. A wide optical beam waist has better adaptability in platform instability. But when beam waist is more than 20μrad, the improvement of system performance is insignificant.