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射电天文高速数据采集与处理平台的设计与应用

         

摘要

Different applications need different equipments. The constructions of these equipments are mostly similar while parameters are different. So it is possible to design a general purpose hardware platform for these applications. After that we only need to download different software according to the application.rnThe platform described in this paper is designed for multi-purpose. It is based on cPCI bus interface and composed of a broadband ADC which can achieve 2G samplings per second and several high performance FPGAs used for controlling and data processing. Considering the capability of the driver, a special construction is adopted between the ADC and FPGAs responsible for data processing. Also the theoretical analysis of the reasons is made in the paper.rnSeveral applications are described in the paper, such as CDAS (Chinese Data Acquisition System) used in VLBI, pulsar receiver and autocorrelation spectral analyzer used in single dish applications. One of them is applied and others are developing now. These applications are just for example but not limited to.%描述了上海天文台自主设计的一套以FPGA为核心,以cPCI总线为桥梁的高速数据采集与处理平台.该平台采用软件无线电技术,使之能够灵活地应用于不同类型天文终端.介绍了该平台的组成、结构以及性能,并分析了采用该结构的原因,同时还介绍了在此平台上的一些已经实现或者可以实现的应用.

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