基于全可编程SoC和LabVIEW的磁共振接收系统设计

A Magnetic Resonance Receiver System Design Based on All Programmable System-on-a-Chip and LabVIEW

本文提出了基于全可编程片上系统(System-on-a-Chip,SoC)和实验室虚拟仪器工程平台(Laboratory Virtual Instrument Engineering Workbench,LabVIEW)的磁共振信号接收系统设计.使用集成了ARM(Advanced RISC Machines)和现场可编程门阵列(Field Programmable Gate Array,FPGA)的全可编程SoC作为接收机的主芯片,利用Xilinx提供的数字信号处理(Digital Signal Processing,DSP)开发工具System Generator设计了数字下变频(Digital Down Converter,DDC)算法,并实现了接收机硬件电路.使用可视化编程平台LabVIEW设计了磁共振上位机软件,完成了磁共振信号的显示、存储和与接收机通信的工作,提高了软件开发效率.实验结果表明,本文设计的接收机能正确接收磁共振回波信号,且具有较高的信噪比.

This paper presents the design of a magnetic resonance signal receiving system based on all programmable SoC(System-on-a-Chip)and LabVIEW(Laboratory Virtual Instrument Engineering Workbench).Using the all programmable SoC that integrates ARM(Advanced RISC Machines)and FPGA(Field Programmable Gate Array)as the main chips of the receiver,the DDC(Digital Down Converter)algorithm was designed using System Generator,a DSP(Digital Signal Processing)development tool provided by Xilinx,and the receiver hardware circuit designed by the authors.The visual programming platform LabVIEW was used to design the magnetic resonance upper computer software.Display,storage and communication of the magnetic resonance signals were done with the receiver.Experimental results showed that the receiver designed could receive magnetic resonance echo signals correctly and provided a high signal-to-noise ratio.Using LabVIEW to design magnetic resonance software on personal computers significantly improved software development efficiency.