FX型相关处理机长期累加器子系统的研究  

Research on Data Reduction Module of High-speed FX Correlator

作　　者：卜朝晖[1] 

机构地区：[1]中国科学院上海天文台

出　　处：《云南天文台台刊》2003年第4期12-18,共7页Publications of the Yunnan Observatoty

摘　　要：介绍了中国VLBI网FX型相关处理机的结构和功能,并着重阐述了相关处理机的长期累加器子系统(LTA),它是相关处理机的条纹数据压缩部件。通过对长期累加器子系统的研究,提出了对该子系统的改进方案,以提高硬件线路的集成度和系统的可靠性,适应了对相关处理机更快速度、更高精度及多台站测量的要求,并说明了实现方法及其改进后的特点。The structure and the functions of the high-speed FX correlator of Chinese VLBI network are described, and its long term accumulator (LTA) is introduced in detail. The long term accumulator is the data reduction module of the correlator. Enhancing the integration of the circuit and the reliability of LTA, an improvement is presented by means of the study on the long term accumulator, to meet the new requirements for the correlator, such as higher speed and higher precision. Meanwhile, a specific way to implement the improvement and its traits after the improvement are introduced briefly.

关 键 词：相关处理机 长期累加器 数据压缩部件 甚长基线干涉测量 

分 类 号：P228.6[天文地球—大地测量学与测量工程]