基于时频分析的伪码与线性调频复合体制侦察信号参数估计研究  

Study on Reconnaissance Signal Parameter Evaluation of PN and LFM Based on Time-Frequency Analysis

作　　者：林俊[1] 熊刚[2] 王智学[1] 

机构地区：[1]解放军理工大学通信工程学院,南京210094 [2]中国电子科技集团第36研究所,嘉兴314001

出　　处：《电子与信息学报》2006年第6期1045-1048,共4页Journal of Electronics & Information Technology

摘　　要：研究了伪码-线性调频复合体制侦察信号识别的时频分析方法,推导了PRBC-LFM侦察信号的Wigner时频分布函数,通过对ω=ω0+Kt截面上WVD分析,从中提取了与载频、调频斜率和伪码参数(子脉冲宽度、编码位数、脉冲周期等)有关的特性,设计了参数估计方法,最后在高斯噪声环境下对分析的结果进行了仿真。结果表明该文提出的方法对PRBC-LFM信号的识别优于谱相关方法,而且应用不受调频带宽与伪码谱宽关系的限制。A time-frequency analysis method for reconnaissance signal recognition of PN and LFM is studied, wigner time-frequency distribution function for PRBC-LFM reconnaissance signal is deduced, By WVD analysis, features related to carrier frequency, FM slope and PN parameters such as sub-pulse width, code-length and pulse cycle are extracted. Then a method for the parameter evaluation is presented. Finally, analysis results are simulated under Gaussian noise conditions. Simulation show the method is superior to spectral correlation method on PRBC-LFM signal recognition and not limited to relations between bandwidth of FM and spectral width of PN.

关 键 词：参数估计 伪码 线性调频 时频分析 

分 类 号：TN971.1[电子电信—信号与信息处理]