数据采集与处理2018，Vol.33Issue(1)：32-40,9.DOI:10.16337/j.1004-9037.2018.01.004
基于多路欠采样的多分量LFM信号参数估计
Parameter Estimation of Multi-component LFM Signal with Multiple Subsampling Channels
董宁斐 1刘光祖 1束锋 1王建新1
作者信息
- 1. 南京理工大学电子工程与光电技术学院,南京,210094
- 折叠
摘要
Abstract
A parameter-estimation method based on subsampling for multi-component linear frequency modulated(LFM)signal is proposed.The received signal is subsampled by multiple analog to digital con-verters(ADCs)with identical sampling rate and different sampling time.The total sampling rate of all ADCs is lower than the Nyquist rate of original LFM signal.As the product ambiguity function of a sin-gle subsampling sequence is a single tone,the chirp rate is estimated by searching for the peak of the product ambiguity function.Then dechirp operation is conducted for all subsampling sequences to obtain multitone signals,from which the initial frequencies of LFM components are estimated by solving mo-ment-preserving problem and over-determined equations.In the proposed method,parameters of the LFM signal are estimated from sub-Nyquist samples,and the estimation is easily realized with simple op-erations.Simulation results verify the effectiveness and accuracy of the proposed method.关键词
线性调频信号/参数估计/欠采样/解线调Key words
linear frequency modulated signal/parameter estimation/subsampling/dechirp分类
信息技术与安全科学引用本文复制引用
董宁斐,刘光祖,束锋,王建新..基于多路欠采样的多分量LFM信号参数估计[J].数据采集与处理,2018,33(1):32-40,9.
