基于傅里叶梅林变换的宽带非线性调频信号时差/尺度差估计方法  

Wideband NLFM Signal TDOA/SDOA Estimation Based on Fourier and Mellin Transform

作　　者：张亮 于洪波 孙殿星 程树强 张翔宇 王国宏 ZHANG Liang;YU Hongbo;SUN Dianxing;CHENG Shuqiang;ZHANG Xiangyu;WANG Guohong(Naval Aviation University,Yantai 264000 China;No.94326 Unit of PLA,Ji'nan 250000 China;No.94201 Unit of PLA,Ji'nan 250000 China)

机构地区：[1]海军航空大学,山东烟台264000 [2]中国人民解放军94326部队,济南250000 [3]中国人民解放军94201部队,济南250000

出　　处：《电光与控制》2022年第10期64-70,共7页Electronics Optics & Control

基　　金：国家自然科学基金(61731023);博士后科学基金(2021M693003);山东省自然科学基金(ZR2020QF071 ZR2020MF015)。

摘　　要：针对宽带非线性调频信号时差/尺度差估计难题,提出一种基于傅里叶梅林变换的估计方法。首先,计算两路信号傅里叶变换,取包络消除时差影响;然后,计算两路信号频谱包络的尺度互相关函数,估计尺度差;最后,根据估计结果对第1路信号进行时间尺度,再与第2路信号进行时域相关处理估计时差。仿真结果表明,分析结论正确,所提方法可行、有效。To solve the estimation problem of Time Difference of Arrival(TDOA)and Scale Difference of Arrival(SDOA)for wideband Nonlinear Frequency Modulation(NLFM)signals a method based on Fourier and Mellin transform is proposed.Firstly Fourier transform is conducted on the signals from both channels and their envelope is taken to eliminate the influence of TDOA.Secondly the Scale Cross-correlation Function(SCF)of the envelope of signals from both channels is calculated to estimate SDOA.Finally Time-Scaling(TS)operation is performed on the signal in the first channel according to the estimation result and then TDOA is estimated by calculating time-domain correlation function with the signal in the second channel.The simulation results show that the conclusion is correct and the proposed method is feasible and effective.

关 键 词：时差/尺度差估计 傅里叶变换 梅林变换 非线性调频 

分 类 号：TN957[电子电信—信号与信息处理]