相位差群变化规律下相位噪声测量技术  

Phase noise measurement based on the regularity change of phase difference group

作　　者：李智奇[1] 周渭[1] 张雪萍[1] 刘晨[1] 

机构地区：[1]西安电子科技大学机电工程学院,陕西西安710071

出　　处：《西安电子科技大学学报》2013年第4期114-118,共5页Journal of Xidian University

基　　金：国家自然科学基金资助项目(61201288)

摘　　要：根据信号间的频率关系以及相位群变化的规律性,提出了一种基于相位差群变化规律的相位噪声处理方法.相位的起伏导致相位差群同步的变化,通过参考信号和被测信号之间的相位重合检测来建立测量闸门,实现相位差群同步的测量,以消除±1个数字的量化误差.使两信号在标称值相同或呈倍数情况下完成相互之间的比对与处理,进而在抑制载频的情况下提取被测信号的相位噪声信息,实现1～190MHz相位噪声的高分辨率测量.A method for phase noise measurement is put forward based on the regularity change of the phase difference group and the frequency relationship between the signals. The technology takes advantage of the phase difference relationship affected phase fluctuant change between the periodic signals in nature. The ±1 count error can be eliminated by building the measuring gate using phase coincidence detection to measure phase difference group synchronization between reference and measured frequency. The comparison and processing can be completed between the same or multiple frequency signals. The phase noise measurement can be realized in this condition so that the carrier frequency is inhibited in order to extract the information on the signal phase noise. The high resolution phase measurement can be realized in the frequency range of 1- 190 MHz.

关 键 词：相位噪声 重合检测 量化误差 单边带 功率谱密度 

分 类 号：TM937.4[电气工程—电力电子与电力传动]