摘要
针对空天地一体化通信网中低轨卫星信号影响高轨卫星通信系统工作的情况,首先建立低轨卫星对高轨卫星通信系统的干扰区域模型,推导出低轨卫星的规避区域计算公式,从而实现2个系统的干扰协调。其次,在高轨卫星链路和低轨卫星链路都服从阴影莱斯分布的条件下,推导出存在干扰条件下的高轨卫星通信系统的中断概率闭合表达式。最后,计算机仿真验证了理论推导的正确性,并且对低轨卫星位于干扰规避区域之内和之外的高轨卫星通信系统的性能进行评估,为空天地一体化通信网中高低轨卫星共存条件下的系统规划提供参考。
In the satellite-aerial-terrestrial network,the transmit signal of the low-orbit satellite affects the normal operation of the high-orbit satellite communication system.To overcome the challenge,first interference area model of low-orbit satellite to high-orbit satellite communication system is established,and the formula of avoidance area of low-orbit satellite is derived,so as to realize the interference coordination of two systems.Then,under the condition that high-orbit satellite link and the low-orbit satellite link all undergoes Shadowed-Rician fading,an analytical expression for the outage probability(OP)of the considered network with low-orbit satellite interference is derived.Finally,numerical results are given to confirm the validity of the theoretical formulas and evaluate the performance of the high-orbit satellite communication system of the low-orbit satellite within and outside the interference avoidance area,which provide useful guidelines for the actual communication system design and application.
作者
邢瑞阳
左增宏
吴启星
Xing Ruiyang;Zuo Zenghong;Wu Qixing(Beijing Institute of Tracking and Technology,Beijing 100094)
出处
《航天电子对抗》
2023年第3期38-43,共6页
Aerospace Electronic Warfare
关键词
卫星通信
网间干扰
衰落信道
中断概率
satellite communication
network interference
fading channel
outage probability
