火力与指挥控制2015，Vol.40Issue(8)：27-32,6.
基于IFM的交叠线性调频信号参数估计
Parameters Estimation of Overlapping LFM Signals by IFM
摘要
Abstract
Linear Frequency Modulation (LFM) signals is an important intra-pulse modulation signal of pulse compression radar,but current IFM system can not detect this signal,at the same time overlapping signal can not be detected in IFM system. So based on IFM system,this paper analyzes theoretical output of single and overlapping LFM signal through IFM system. On the basis of this,an improved idea and algorithm are put forward,that can estimate parameters of overlapping LFM signal. New method uses Analog To Digital Converter (ADC)parts to make quantitative and continuous time sampling to frontier un-overlapping output value of the two orthogonal channel (I/Q),and gets discrete frequency values of one signal,at last used LMS algorithm to estimate initial frequency and frequency modulation slope of this LMF single. Based on this,according to the overlapping output values of I/Q, parameters of another signal is estimated. Simulation validation of Matlab/Simulink show that this method can estimate parameters of two overlapping singles.关键词
瞬时测频/线性调频信号/信号交叠的频率分离/ADCKey words
instantaneous frequency measurement/LFM signal/separation of the overlapping signals frequency/ADC分类
信息技术与安全科学引用本文复制引用
王士岩,王星,王洪迅,汪欣..基于IFM的交叠线性调频信号参数估计[J].火力与指挥控制,2015,40(8):27-32,6.基金项目
陕西省自然科学基金资助项目(2012JQ8019) （2012JQ8019）
