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arXiv 1102.0144astro-ph.IMcs.DC
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多元Radio Telescopes高速网络化信号处理平台

A High Speed Networked Signal Processing Platform for Multi-element Radio Telescopes

Peeyush Prasad, C. R. Subrahmanya

摘要:

提出了一种适用于多元射电望远镜实时信号处理的网络化信号处理系统(NSPS)结构。在该系统中,多元射电望远镜被视为一个应用程序的多传感器,数据融合的问题,可以分解成一个通用的一组计算和网络组件,一个实用的和可扩展的架构,使当前的技术。需要这样一个系统的背景下出现的一个正在进行的计划,重新配置的Ooty射电望远镜(ORT)作为一个可编程的264元阵列,这将使几个新的观测能力,大规模的调查,这个成熟的望远镜。对于这种应用,有必要管理、路由和组合大量数据,这些数据的实时整理需要维持大的I/O带宽。由于这些是许多多传感器融合应用的一般要求,我们首先描述了NSPS的基本架构的融合树,然后再详细说明其应用程序的ORT。本文讨论了与高速分布式数据采集、基于现场可编程门阵列(FPGA)的对等网络相关的问题,这些网络在路由时支持重要的实时处理,并为千兆以太网等典型商品网络提供最后一英里接口。该系统基本上是一对两个合作网络,其中一个是商品高性能计算机集群的一部分,另一个是基于商用现货(COTS)技术,并得到公共领域软件/固件组件的支持。

英文摘要:

A new architecture is presented for a Networked Signal Processing System (NSPS) suitable for handling the real-time signal processing of multi-element radio telescopes. In this system, a multi-element radio telescope is viewed as an application of a multi-sensor, data fusion problem which can be decomposed into a general set of computing and network components for which a practical and scalable architecture is enabled by current technology. The need for such a system arose in the context of an ongoing program for reconfiguring the Ooty Radio Telescope (ORT) as a programmable 264-element array, which will enable several new observing capabilities for large scale surveys on this mature telescope. For this application, it is necessary to manage, route and combine large volumes of data whose real-time collation requires large I/O bandwidths to be sustained. Since these are general requirements of many multi-sensor fusion applications, we first describe the basic architecture of the NSPS in terms of a Fusion Tree before elaborating on its application for the ORT. The paper addresses issues relating to high speed distributed data acquisition, Field Programmable Gate Array (FPGA) based peer-to-peer networks supporting significant on-the fly processing while routing, and providing a last mile interface to a typical commodity network like Gigabit Ethernet. The system is fundamentally a pair of two co-operative networks, among which one is part of a commodity high performance computer cluster and the other is based on Commercial-Off The-Shelf (COTS) technology with support from software/firmware components in the public domain.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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