嵌入式千兆以太网传输系统在VLBI硬件相关处理机中的应用

EMBEDDED GIGA-BIT NETWORK SYSTEM USED IN VLBI HARDWARE CORRELATOR PROCESSOR

甚长基线干涉测量(VLBI)是重要的射电天文技术,具有极高的空间分辨率,是国际上广泛采用的深空探测器高精度测量手段。硬件相关处理机则是VLBI数据预处理的核心设备。随着以FPGA(Field Programmable Gate Array)为实现平台的嵌入式系统的不断发展,用FPGA和嵌入式系统作为实现方式成为硬件相关处理机研究的一个方向。研究了如何利用嵌入式千兆以太网传输系统对硬件相关处理机的长期累加子系统(LTA)进行改进。

As a radio astronomical observation technology with very high space resolution, Very Long Baseline Interferometry （VLBI） has been widely used in the high accuracy deep space probe tracking activities. The correlator is the key data-preprocessing device. With the rapid development of embedded system implemented on FPGA platform, FPGA and embedded system based hardware corelator become the highlight of the VLBI technology and have a dramatic progress. This paper studies the use of embedded Giga-bit Ethernet transmission system in the hardware correlator＇s long-term cumulative（LTA） processor subsystem improvement.