基于SOC架构软件无线电平台的低轨卫星载荷接收信号模拟技术研究

Simulation Technology of LEO Satellite Payload Received Signal Based on SOC Architecture Software-Defined Radio Platform

摘要:

面向低轨卫星载荷测试中可灵活配置和小体积宽带信号模拟的需求,采用了AD9361和Zynq-7000构成了信号模拟系统,AD9361射频捷变芯片具有宽带、小型化特点,基于SOC架构设计的Zynq-7000运行Linux操作系统,可完成低轨卫星轨道的位置、速度以及卫星接收信号的多普勒值计算,Zynq-7000通过寄存器实现对AD9361射频捷变芯片参数配置,同时将接收信号多普勒值计算结果通过AXI总线实时设置AD9361射频捷变参数可实现70MHz至6GHz低轨卫星载荷接收信号的模拟。论文给出了基于Zynq-7000芯片Linux操作系统下实时轨道参数和信号参数计算的流程和结果,测试了AD9361射频捷变芯片模拟生成的低轨卫星载荷接收信号性能参数。

Abstract:

In order to meet the simulation needs of LEO satellite payload test for flexible configuration and small size broadband signal, using the AD9361 and Zynq-7000 constitutes a signal simulation system, AD9361 RF agility chips have broadband, small features, based SOC architecture design Zynq-7000 running the Linux operating system, can complete LEO satellite orbit position, speed and satellite Doppler value of the received signal is calculated, Zynq-7000 using register to realize AD9361 RF agile chip configuration parameters while the received signal Doppler value calculation results in real time AD9361 RF AXI bus set parameters to achieve agility LEO payload of the received signal simulation. Papers are presented based on Zynq-7000 under Linux operating system real-time orbit parameters and parameter calculation of process and results, testing AD9361 RF agile chips to simulate the performance parameters of low Earth orbit satellite receives signals.