摘要
为实现用户卫星运动环境下信号的稳定跟踪[6]和精确测量[5],建立了用户卫星对中继卫星和地面测控站的多普勒频率及各阶导数的数学模型。根据数学模型推导计算公式,计算出理想运动模型的多普勒频率值。利用卫星仿真软件STK进行通信链路仿真,将仿真结果与理论计算结果进行比较。当用户卫星处于用户卫星和中继卫星星下点接近重合、用户卫星星下点和地面测控站接近重合的轨道时,多普勒频率及各阶导数仿真结果取得极大值。仿真结果表明,理论计算结果为多普勒频率和各阶导数的最大值,对接收机捕获范围和动态设计具有现实指导意义。
To achieve stable tracking and accurate measurement of the user satellite signal in the environment of motion, this paper built the doppler frequency mathematical model of the user satellite to the relay satellite and the ground observation and control station, also deduced the compute formula according to the mathematical model, and computed the doppler frequency value of ideal motion model. The paper simulated the communication link based on the satellite simulation software called STK, and compared simulation results with theoretical calculations. The results indicate that the doppler frequency and derivative get the max value when the user satellite and the relay satellite and the ground station have the same place on the earth. From the simulation results, we can get lhe conclusion that the calculated results are the maximum Doppler frequency and the derivative, and the paper provides a practical guiding to the receiver capture range and dynamic design.
出处
《计算机仿真》
CSCD
北大核心
2012年第11期149-153,共5页
Computer Simulation
关键词
用户卫星
多普勒频率
仿真
User satellite
Doppler frequency
Simulation
作者简介
赵泽兵（1982-），男（汉族），山西晋城人，工程师，主要研究方向为扩频接收机设计；
熊建林（1964-），男（汉族），湖北孝感人，研究员，主要研究方向为通信与遥测遥控系统；
郑戈（1976-），男（汉族），河南人，高级工程师，主要研究方向为通信与遥测遥控系统；
陈弥（1985-），男（汉族），湖北人，工程师，主要研究方向为数字通信卫星测控。
