相控阵卫星跟踪闭环实验系统设计与实现

摘要

相控阵卫星跟踪系统是一个庞大、复杂的闭环系统,主要包含卫星及其发射信号、相控阵接收天线、基带信号处理单元、波束指向控制四个部分.为了解决卫星自跟踪系统在实验中对实时性的要求,降低测试成本和测试难度,设计了一套运动平台卫星自跟踪闭环实验系统.上位机完成了运动目标建模和波束指向控制功能,基于FPGA的四通道硬件板完成接收信号的产生,自跟踪基带数字板完成基带信号的搜索、测角和跟踪滤波,各部分之间通过SMA或串口进行连接.对每一部分作了理论分析和硬件设计描述,并在最后给出了测试结果,表明了演示系统的可行性和有效性.%Phased array satellite tracking system is a large and complex closed-loop system,which con-sists of four parts:satellite and its transmitting signal,phased array receiving antenna,baseband signal pro-cessing unit and beam pointing control.In order to solve the real-time requirement of satellite auto-tracking system in experiment and reduce the cost and difficulty of testing,this paper designs a set of motion plat-form based satellite auto-tracking closed loop experiment system.The host computer completes the moving target modeling and beam pointing control function.The FPGA-based four-channel hardware board per-forms the received signal generation.The auto-tracking baseband digital board carries out the baseband sig-nal search,angle measurement and tracking filtration.These parts are connected by SMA or serial inter-face.The theoretical analysis and hardware design of each part are given.Finally,the test results are giv-en,which shows the feasibility and effectiveness of the demonstration system.