I/Q methods applied to phase detection of RF signals

被引：0

作者：

Liu Yi-Lei ^{[1
]}

Wang Guang-Wei

Wang Fang

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

来源：

HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION | 2006年 / 30卷 / 08期

关键词：

I/Q demodulator; amplitude imbalance; phase imbalance; digital I/Q;

D O I：

暂无

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Phase detection performs a crucial role in the phase control loop of RF signals in accelerators. This paper presents two methods that apply I/Q technique to phase detection of RF signals. The content includes the study of arithmetic and the setup of systems. The methods are as follows: 1. adopting I/Q demodulator, AD card and the technique of digital processing to detect the phase; 2. direct digital I/Q method. In the former, feasible calibration arithmetic against the inherent error of I/Q demodulators is suggested. In the latter, I and Q signals are generated by modulating the LO signal with a step of (2 pi/N). The phase detection error is below 0.5 degrees by using either of them.

引用

页码：780 / 783

页数：4