基于瞬时相位拟合的LFM信号参数估计算法  

Parameter Estimation Algorithm of LFM Signal Based on Instantaneous Phase Fitting

作　　者：张西托[1] 陈珊珊[2] 胡冬梅[1] 饶伟[1] 

机构地区：[1]海军潜艇学院,青岛266071 [2]中国石油大学,东营257061

出　　处：《舰船电子对抗》2010年第1期115-117,共3页Shipboard Electronic Countermeasure

摘　　要：针对传统线性调频(LFM)信号参数估计算法中复杂的搜索和计算问题,提出了一种不需要参数搜索的快速LFM信号参数估计算法。该算法先用希尔伯特变换估计LFM信号瞬时相位,再用二次相位函数拟合LFM信号瞬时相位从而得到初始频率和调频斜率的估计。仿真验证了本文算法的有效性,说明该算法能够给出满意的参数估计结果。Aiming at the complicated searching and calculating problems in the parameter estimation algorithm of traditional linear frequency modulation （LFM） signal, this paper puts forward a kind of fast parameter estimation algorithm of LFM signal needn＇t the parameter searching, which firstly estimates the instantaneous phase of LFM signal by Hilbert transform, then uses the quadratic phase function to fit the instantaneous phase of LFM signal to obtain the estimation of initial frequency and frequency modulation slope. The simulation validates the validity of the algorithm Offered by this paper,indicates that the algorithm can provide the Satisfactory parameter estimation result.

关 键 词：线性调频信号 希尔伯特变换 瞬时相位 拟合 

分 类 号：TN957.5[电子电信—信号与信息处理]