RF applications in digital signal processing
RF applications in digital signal processing
复制标题
射频在数字信号处理中的应用
DOI：
10.5170/cern-2008-003.249
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
T. Schilcher
中科院分区：
文献类型：
--
作者：
T. Schilcher
粒子加速器的低水平射频（LLRF）系统对稳定性、准确性、可重复性和监测能力的要求越来越高。同时，数字信号处理技术的持续快速发展正在被利用来满足这些需求，从而导致数字LLRF系统的发展。本课程的第一部分将重点介绍射频信号处理的一些重要组成部分，包括混频器理论和下变频，I/Q（幅度和相位）检测，数字下变频（DDC）和抽取，最后对I/Q调制器进行调查。课程的第二部分将介绍反馈系统的基本概念，包括数字腔场和相位控制的例子，然后是径向回路架构。用于抑制重复波束干扰的自适应前馈系统将被研究。最后，总结了系统识别方法的应用和原理。
Ever higher demands for stability, accuracy, reproducibility, and monitoring capability are being placed on Low-Level Radio Frequency (LLRF) systems of particle accelerators. Meanwhile, continuing rapid advances in digital signal processing technology are being exploited to meet these demands, thus leading to development of digital LLRF systems. The first part of this course will begin by focusing on some of the important building-blocks of RF signal processing including mixer theory and down-conversion, I/Q (amplitude and phase) detection, digital down-conversion (DDC) and decimation, concluding with a survey of I/Q modulators. The second part of the course will introduce basic concepts of feedback systems, including examples of digital cavity field and phase control, followed by radial loop architectures. Adaptive feed-forward systems used for the suppression of repetitive beam disturbances will be examined. Finally, applications and principles of system identification approaches will be summarized.