基于压缩采样的宽带线性调频干扰信号参数估计方法

计算机工程

基于压缩采样的宽带线性调频干扰信号参数估计方法

周新¹,姚富强²,牛英滔²,邓佰佐³,于江⁴

(1.解放军理工大学通信工程学院,南京 210007; 2.南京电讯技术研究所,南京 210007; 3.71521部队,河南新乡 453000;4.69016部队,乌鲁木齐 830001)

收稿日期:2017-01-09 出版日期:2018-01-15 发布日期:2018-01-15
作者简介:周新(1987—),男,硕士,主研方向为无线通信抗干扰;姚富强,研究员、博士后;牛英滔,高级工程师;邓佰佐,学士;于江,硕士。
基金资助:
国家自然科学基金(61401505)。

Parameter Estimation Method of Wideband Linear Frequency-modulated Jamming Signal Based on Compressed Sampling

ZHOU Xin¹,YAO Fuqiang²,NIU Yingtao²,DEN Baizuo ³,YU Jiang ⁴

(1.College of Communication Engineering,PLA University of Science and Technology,Nanjing 210007,China; 2.Nanjing Telecommunication Technology Institute,Nanjing 210007,China; 3.The 71521th Unit of PLA, Xinxiang,Henan 453000,China; 4.The 69016th Unit of PLA,Wulumuqi 830001,China)

Received:2017-01-09 Online:2018-01-15 Published:2018-01-15

摘要/Abstract

摘要： 为提高硬件对宽带干扰信号的采样和处理效率,提出一种宽带线性调频干扰信号参数估计方法。在无任何先验知识的情况下,对宽带线性调频干扰信号进行窄带滤波,再采用快速解线性调频技术估计它的调频速率。依据调频速率估计值构造解调器并对宽带线性调频干扰信号进行解调,消除信号的频率变化,使其在频域满足稀疏性。对解调信号进行压缩采样、部分重构估计相关参数。仿真结果表明,在随机采样点数远低于奈奎斯特采样点数的情况下,该方法能够准确估计宽带线性调频干扰信号参数。

关键词: 线性调频信号, 通信抗干扰, 压缩采样, 参数估计, 宽带信号

Abstract: In order to improve the efficiency of the wideband jamming signal sampling and processing of hardware,a novel method is proposed for parameter estimation of wideband Linear Frequency Modulation(LFM) jamming signal.When priori knowledge is unknown,a narrow-band filtering is used for the wideband LFM jamming signal,whose frequency-modulated rate is estimated by the rapid linear frequency modulation technique.Based on that estimated rate,the wideband LFM jamming signal is demodulated by down frequency demodulator.The frequency shifty of jamming signal will be eliminated and the demodulated signal becomes spare in the discrete Fourier domain.The demodulated signal is compressed sampled and partially refactored for parameter estimation.Simulation results show that the proposed method can accurately estimate the parameter of the wideband LFM jamming signal,even with the points of random projection far less than that of Nyquist sampling.

Key words: liner frequency-modulated signal, communication anti-jamming, compressed sampling, parameter estimation, broadband signal

中图分类号:

TP393

周新,姚富强,牛英滔,邓佰佐,于江. 基于压缩采样的宽带线性调频干扰信号参数估计方法[J]. 计算机工程.

ZHOU Xin,YAO Fuqiang,NIU Yingtao,DEN Baizuo,YU Jiang. Parameter Estimation Method of Wideband Linear Frequency-modulated Jamming Signal Based on Compressed Sampling[J]. Computer Engineering.

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