摘要
针对高稳定性频率源在收发共用及收发分置系统中的广泛应用,而传统的对普通频率源的分析方法已不适用于高稳定性频率源,建立了高稳定性频率源的信号模型,提出了一种基于中频采样的测量高稳定性频率源的低接近载波相位噪声的方法.该方法先通过中频采样和信号预处理得出频率源的相位起伏值,然后采用匹配滤波精确搜索并补偿高稳定性频率源输出信号的一阶频差和二阶频差,再计算获得高稳定性频率源的中短期频率稳定度和低接近载波相位噪声.最后给出了针对某雷达高稳定性数字频率源实测数据的分析结果.
As widely application of the frequency synthesizer with high stability（FS-HS） in the sharing transmitter and receiver system and separating transmitter and receiver systems, however, the conventional methods of analyzing the common frequency synthesizer are not applicable to FS-HS, the signal model for FS-HS is modeled. An approach of low close-in carrier phase-noise which is based on the IF sampling technique to measure FS-HS is presented. This method is used to obtain the phase fluctuation of the frequency synthesizer by IF sampling and signal pre-processing firstly,then adopt the matching filters to search and compensate the first-order and second-order frequency deviation of the signal output by the FS-HS,and finally, calculate to obtain medium-short term frequency stability and low close-in carrier phase noise of the FS-HS.At last,the analyzed result of the real measured data of the high-stable digital frequency synthesizer for a radar is presented.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2008年第3期594-598,共5页
Acta Electronica Sinica
基金
教育部新世纪优秀人才支持计划项目(No.NCET-06-0856)
关键词
高稳定性频率源
频率稳定度
低接近载波相位噪声
二阶频差
frequency synthesizer with high stability
frequency stability
low close-in carder phase-noise
second-order fiequency deviation
