摘要
针对深空通信信道距离长、信噪比低、链路损耗巨大等特点,提出了太阳闪烁与多径效应影响下的深空星间链路信道理论模型。在此基础上,构建了一个基于硬件现场可编程门阵列和控制计算机的深空星间链路信道模拟器,有效模拟了深空星间通信的多径衰落、传播路径损耗和信道延迟,规避了投入高、风险高、耗时长的实地通信实验。实测结果表明,该深空星间链路模拟器输出的载噪比及误比特率波形与理论结果吻合,可用于实验室条件下对深空星间链路的实时模拟复现。
For the characteristics of deep-space communication,i.e.,long distance,low signal-to-noise ratio(SNR)and huge link loss,an analytical channel model for deep-space inter-satellite links considering the influence of sun flicker and multi-path effect is proposed.On this basis,a deep space inter-satellite link channel emulator based on Field Programmable Gate Array(FPGA)and Personal Computer(PC)is developed,which can effectively simulate the multi-path fading,propagation path loss and channel delay of inter-satellite communication.It also avoids the high cost and risk of field communication experiments.The test results show that the output signal-to-noise ratio and bit error rate(BER)of the proposed deep-space inter-satellite link emulator are in good agreement with the theoretical results.It can be used for real-time simulation and reproduction of the deep-space inter-satellite link under the laboratory conditions.
作者
张周不染
朱煜良
杨盛庆
胡金辉
毛开
朱秋明
ZHANG Zhouburan;ZHU Yuliang;YANG Shengqing;HU Jinhui;MAO Kai;ZHU Qiuming(College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211000;Shanghai Aerospace Control Technology Institute,Shanghai,201109)
出处
《飞控与探测》
2020年第5期97-104,共8页
Flight Control & Detection
基金
国家重大科学仪器设备开发专项(61827801)
国防科技重点实验室基金(6142001190105)
航空科学基金(201901052001)
南京航空航天大学研究生创新基地(实验室)开放基金(20190418)。
关键词
深空星间链路
信道模拟器
多径效应
太阳闪烁
现场可编程门阵列
deep space inter satellite link
channel emulator
multipath effect
sun flicker
field programmable gate array
