Walker-δ星座星间链路的预算分析与仿真  

Budget Analysis and Simulation of Inter-satellite Link in Walker-δ Constellation

作　　者：韩松辉[1,2] 归庆明[2] 李建文[1] 杜院录[2] 

机构地区：[1]信息工程大学测绘学院,郑州450052 [2]信息工程大学理学院,郑州450001

出　　处：《中国空间科学技术》2012年第2期10-16,共7页Chinese Space Science and Technology

基　　金：国家自然科学基金(40974009;41174005);河南省科技创新人才计划;郑州市科技计划攻关项目(0910SGYG21198);中国卫星导航学术年会青优基金资助项目

摘　　要：为确定星间链路其他传输耗损以及合理发射功率,首先,在方位角、俯仰角的变化范围较小,平均距离较小和距离变化范围较小的情况下,给出Walker-δ星座星间链路的建立准则。然后,详细讨论星座星间链路的预算分析和自由空间传输耗损及其他传输耗损,并给出这些传输耗损的参考值或求解公式;特别是提出以数据传输速率的数学期望等于额定数据传输速率为条件来确定合理发射功率的方法,并推导数据传输速率方差的计算公式。最后,在仿真算例中,分析Walker 27/3/1星座中星间链路的方位角、俯仰角和距离的变化范围,讨论不同载波频率和不同数据传输速率对星间链路发射功率的影响,并给出了合理的发射功率。There is transmission power of a need for more discussion on the other transmission loss and a reasonable inter-satellite link （ISL）. Firstly, the criteria for ISL establishment were given under the agreement of short average distance and small range of ISL azimuth, elevation angle and distance. Secondly, the budget of the ISL, the free space propagation loss and other transmission loss were discussed, and the reference value or the formula of these transmission losses was given later. Furthermore, a reasonable transmission power was given by the probabilistic knowledge under the condition that the mathematical expectation of the practical data was equal to the rated data of the transfer rate. Then, the variance formula of the data transmission rate was derived. Finally, the ranges of azimuth, elevation angle and distance of ISL in the Walker 27/3/1 constellation were analyzed by simulation. The impact of different carrier frequencies and data rates on the transmission power were discussed, and a reasonable transmission power was also determined.

关 键 词：星间链路 传输耗损 发射功率 Walker-δ星座 

分 类 号：V412.41[航空宇航科学与技术—航空宇航推进理论与工程]