利用改进SM的LFMCW信号参数估计算法

doi:10.16182/j.issn1004731x.joss.201809007

系统仿真学报 ›› 2018, Vol. 30 ›› Issue (9): 3283-3287.doi: 10.16182/j.issn1004731x.joss.201809007

利用改进SM的LFMCW信号参数估计算法

江莉, 周军妮, 杨润玲, 刘利

西安建筑科技大学信息与控制工程学院,陕西西安 710055

收稿日期:2016-12-02 出版日期:2018-09-10 发布日期:2019-01-08
作者简介:江莉(1982-),女,陕西商洛,博士,讲师,研究方向为智能信号处理; 周军妮(1977-),女,陕西西安,硕士,讲师,研究方向为信号与信息处理。
基金资助:
陕西省教育厅专项科研计划(16JK1429)

Parameter Estimation of LFMCW Signals Based on Improved SM Method

Jiang Li, Zhou Junni, Yang Runling, Liu Li

School of Information and Control Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

Received:2016-12-02 Online:2018-09-10 Published:2019-01-08

摘要/Abstract

摘要： 对线性调频连续波(LFMCW, Linear Frequency Modulated Continuous Wave signal)信号进行参数估计是近年来电子侦察的研究热点问题。针对LFMCW信号在时频图上的分布特点,提出了一种基于改进SM (S-Method)的LFMCW信号参数估计算法,采用一种自适应窗宽的短时傅里叶变换(STFT, Short-time Fourier Transform)算法计算SM,抑制交叉项干扰的同时,提高时频分辨率,进而估计信号的参数。理论分析与仿真实验表明,提出方法能够在低信噪比下有效估计信号参数。

关键词: 线性调频连续波信号, 时频分布, 参数估计, S-方法

Abstract: The parameter estimation of linear frequency modulation continuous wave (LFMCW) signal is a research hotspot in electronic reconnaissance systems. In this paper, the time frequency distribution feature of LFMCW signals is studied first. Based on the improved S-method (SM), an algorithm for parameter estimation of LFMCW signals is proposed. It uses short-time Fourier transform (STFT) to calculate the SM with adaptive window width, which can suppress the crossterm interferences and improve the time-frequency resolution. Theoretical analysis and simulation experiment results demonstrate the validity of the proposed algorithm under low SNR.

Key words: linear frequency modulated continuous wave signal, time frequency distribution, parameter estimation, S-method

中图分类号:

TN971

江莉, 周军妮, 杨润玲, 刘利. 利用改进SM的LFMCW信号参数估计算法[J]. 系统仿真学报, 2018, 30(9): 3283-3287.

Jiang Li, Zhou Junni, Yang Runling, Liu Li. Parameter Estimation of LFMCW Signals Based on Improved SM Method[J]. Journal of System Simulation, 2018, 30(9): 3283-3287.

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利用改进SM的LFMCW信号参数估计算法

Parameter Estimation of LFMCW Signals Based on Improved SM Method

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