基于谱相关的正弦调频和脉间伪码调相复合体制侦查信号识别

兵工学报 ›› 2006, Vol. 27 ›› Issue (2): 258-264.

基于谱相关的正弦调频和脉间伪码调相复合体制侦查信号识别

赵惠昌¹，熊刚^1,2，杨小牛²

1．南京理工大学电子工程系，江苏南京210094；2．中国电子科技集团公司第36研究所，浙江嘉兴314001

收稿日期:2005-02-26 上线日期:2014-12-25
通讯作者: 赵惠昌
基金资助:
国防“十五”重点预研项日(413050305)

Signal Recognition of Sine FM and Interpulse Pseudo Code PM Based on Spectral Correlation Method

ZHAO Hui-chang¹, XIONG Gang^1,2, YANG Xiao-niu²

1. Department of Electronic Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China; 2. No. 36 Research Tnstit.ute of CETC, Jiaxing 314001, Zhejiang, China

Received:2005-02-26 Online:2014-12-25
Contact: ZHAO Hui-chang

摘要/Abstract

摘要： 推导了正弦调频和脉间伪码调相复合体制信号的谱相关函数(SCF)，基于谱相关特征给出了对该复合体制侦察信号的自动识别算法。分析了宽带调频和窄带调频两种情况下谱相关函数的特征,对载频、调制频率、调制系数以及伪码的子脉冲宽度、子脉冲重复周期、编码个数进行了盲估计,分析了信噪比对参数估计精度的影响。仿真分析表明，在SNR为-5dB时,对载频和调制频率估计的归ー化均方根误差（NRMSE)小于2.5%,在SNR>0dB时,对伪码参数估计的NRMSE小于7.5%.

关键词: 信息处理技术 , 正弦调频 , 脉间伪码调相 , 信号识别 , 谱相关

Abstract: The spectral correlation function(SCF) of the reconnaissance signal combined sine FM and interpulse pseudo-random code PM was deduced. A recognition algorithm was given, wmch included the estimation of carrier frequency, modulation frequency, modulation coefficient, and the width and period of subpulse and coding number based on the characteristic of SCF of narrowband and broadband FM. The influence of SNR on parameter estimation precision was analyzed. The simulation results show that the NRMSE of estimation of carrier frequency and modulation frequency is less than 2.5% when SNR is equal to — 5 dB, and the NRMSE of pseudo-random code less than 7.5% when SNR is more than 0 dB.

Key words: nformation processing technique , sine FM , interpulse pseudo-random code PM , signal recognition , spectral correlation

中图分类号:

TN911. 72

赵惠昌，熊刚，杨小牛. 基于谱相关的正弦调频和脉间伪码调相复合体制侦查信号识别[J]. 兵工学报, 2006, 27(2): 258-264.

ZHAO Hui-chang, XIONG Gang, YANG Xiao-niu. Signal Recognition of Sine FM and Interpulse Pseudo Code PM Based on Spectral Correlation Method[J]. Acta Armamentarii, 2006, 27(2): 258-264.

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