轨道移频信号频率参数检测方法的研究  

Study on Method for Measurement to Frequency Parameter of Frequency-Shift Track Signal

作　　者：杨明极[1] 刘喜庆[1] 张洪洋[1] 

机构地区：[1]哈尔滨理工大学测控技术与通信工程学院,黑龙江哈尔滨150080

出　　处：《仪表技术与传感器》2012年第7期87-89,共3页Instrument Technique and Sensor

摘　　要：为了进一步提高轨道移频信号频率参数的测量精度,运用欠采样(带通采样)定理和ZOOM-FFT算法对频谱进行细化,根据轨道移频信号的频谱对称特性,引入重心法校正技术,在采样点数为2048情况下,使测量精度比规格要求提高了约3.5倍。To further improve the measurement accuracy of frequency parameters of the frequency-shift track signal,this paper used.Sub-Nyquist Sampling（bandpass sampling） theorem and ZOOM-FFT algorithm for refinement the spectrum,according to symmetry properties of spectrum of frequency-shift track signal,barycenter-regulation technology enables the accuracy to be improved nearly 3 times in the case of 2 048 sampling points.

关 键 词：轨道移频信号 欠采样 ZOOM-FFT 重心法频谱校正 

分 类 号：TN911.6[电子电信—通信与信息系统]