一种短时信号精测频方法  

An Accurate Frequency Measurement Method for Short-time Signal

作　　者：吴扬[1] 柴恒[1] 

机构地区：[1]中国船舶重工集团公司第723研究所,扬州225001

出　　处：《舰船电子对抗》2016年第3期71-73,共3页Shipboard Electronic Countermeasure

摘　　要：脉冲信号的时宽限制了采样点的个数,使得短时信号的频率测量精度无法提高。提出了一种短时信号精测频方法,该方法能显著提高测频精度,从而给雷达信号的分选、识别及特定发射机识别(SEI)提供了很好的稳定度。The time width of pulse signal limits the number of sampling points,which makes the frequency measurement accuracy of short-time signal unable to be improved.This paper presents a kind of accurate frequency measurement method for short-time signal,this method can obviously improves the frequency measurement accuracy,accordingly provides good stability for the radar signal sorting,identification and specific emitter identification（SEI）.

关 键 词：频率测量 窗函数 短时信号 幅频特性 

分 类 号：TN971.1[电子电信—信号与信息处理]