【摘要】：針對(duì)北斗導(dǎo)航星座異軌面激光鏈路通信距離遠(yuǎn)、多譜勒頻移嚴(yán)重、動(dòng)態(tài)變化劇烈、影響通信定位精度的問(wèn)題,提出了一種考慮通信距離和多譜勒特性的星座拓?fù)湓O(shè)計(jì)和優(yōu)化方法。建立了北斗全球星座異軌星間鏈路運(yùn)動(dòng)模型,分析了多譜勒頻移、多譜勒速度和多譜勒加速度的變化規(guī)律;建立了激光鏈路通信距離優(yōu)化模型并提出了優(yōu)化后的拓?fù)湓O(shè)計(jì)方案。仿真結(jié)果表明,優(yōu)化后的拓?fù)浞桨改軌蚪档屯ㄐ懦杀?同時(shí)在保證網(wǎng)絡(luò)通信時(shí)延性能惡化不超過(guò)4%的情況下對(duì)單星建鏈數(shù)量進(jìn)行簡(jiǎn)化,降低了系統(tǒng)建設(shè)成本。仿真結(jié)果表明,上述方法是一種經(jīng)濟(jì)可行的星座拓?fù)湓O(shè)計(jì)方案,為空間信息傳輸優(yōu)化提供了參考。
[Abstract]:Aiming at the problem that the communication distance is long, the frequency shift of Doppler is serious and the dynamic change is violent in Beidou navigation constellation, the accuracy of communication location is affected. A topology design and optimization method for constellation considering communication distance and Doppler property is proposed. The motion model of the intersatellite link of Beidou global constellation is established, the variation law of Doppler frequency shift, Doppler velocity and Doppler acceleration is analyzed, and the optimized communication distance model of laser link is established and the optimized topology design scheme is proposed. The simulation results show that the optimized topology scheme can reduce the communication cost and simplify the number of single star built chains and reduce the cost of system construction while ensuring that the network communication delay performance is not more than 4%. The simulation results show that the above method is an economical and feasible scheme of constellation topology design and provides a reference for the optimization of spatial information transmission.
【作者單位】： 北京跟蹤與通信技術(shù)研究所;
【分類號(hào)】：V443.1
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本文編號(hào)：2299370