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A new IQ detection method for LLRF
Qiu F(邱丰); Gao J(高杰); Lin HY(林海英); Qiu, F; Gao, J; Lin, HY; Liu, R; Ma, XP; Sha, P; Sun, Y; Wang, GW; Wang, QY; Xu, B; Zeng, RH;; Liu R(刘熔); Ma XP(马新朋); Sha P(沙鹏); Sun Y(孙毅); Wang GW(王光伟); Wang QY(王群要); Xu B(徐波)
2012
发表期刊NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
卷号675页码:139-143
摘要Digital LLRF technology has been widely used in new generation particle accelerators. IF quadrature sampling is a common method for amplitude and phase detection. Many strategies, which obey the same rule of f(sample) = (M/N)f(IF) (M/N is a rational number), have been proposed to reduce the effects of spectrum aliasing. However, we found that M/N does not need to be a rational number according to Shannon's theorem. Therefore, we propose a new IQ detection method in this paper. This method is based on a special IIR filter which is derived from an RLC circuit. The unique characteristic of the method is that the value of f(IF) is independent of the value of, f(sample). We have set up an experimental platform to verify our method. A 122.88 MHz sampling clock is used to sample a 3 MHz IF signal. The DOS and PI control techniques are used to realize the closed-loop control. Results show that the stability of the system is within +/- 0.05% (peak to peak) for the amplitude, and with +/- 0.03 degrees (peak to peak) for the phase in 5 h. (C) 2012 Elsevier B.V. All rights reserved.
关键词LLRF IQ detection IIR filter RLC circuit DDS
学科领域Instruments & Instrumentation; Nuclear Science & Technology; Physics; Spectroscopy
DOI10.1016/j.nima.2012.01.068
收录类别SCI
WOS记录号WOS:000302973600021
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223865
专题加速器中心
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GB/T 7714
Qiu F,Gao J,Lin HY,et al. A new IQ detection method for LLRF[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2012,675:139-143.
APA 邱丰.,高杰.,林海英.,Qiu, F.,Gao, J.,...&徐波.(2012).A new IQ detection method for LLRF.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,675,139-143.
MLA 邱丰,et al."A new IQ detection method for LLRF".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 675(2012):139-143.
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