圆极化捷变LFM脉冲压缩信号分析  

Analysis of LFM Pulse Compression Signal with Circular Polarization Agility

作　　者：宋立众[1] 乔晓林[1] 孟宪德[1] 

机构地区：[1]哈尔滨工业大学电子与信息技术研究院,哈尔滨150001

出　　处：《现代雷达》2005年第2期43-46,共4页Modern Radar

基　　金：航天基金资助课题

摘　　要：针对极化捷变雷达体制,提出一种脉内线性调频、脉间圆极化编码的新型复合体制雷达信号。其信号采用脉内线性调频信号的脉冲压缩来提高距离分辨率,采用脉间圆极化编码的相关检测来提高对电子干扰的抑制能力。建立了信号的数学模型并给出具体的信号处理方案,研究了一种基于Poincare极化球上空间距离的极化解码方法。仿真结果表明,该信号体制不但具有LFM脉冲压缩信号的特点,而且伪随机编码技术和极化调制技术的结合,使其具有低截获概率,并且抗干扰性能有所提高。This paper proposes a new kind of complex radar signal for the polarization agility radar. Linear Frequency Modulation (LFM) signal is adopted inside pulses and circular polarization coded modulation is adopted between pulses for the radar signal. LFM signal pulse compression is used to improve the range resolution and the correlation detection of circular polarization coded signal is used to suppress the electronic interferences. The mathematical model of the signal is established and the specific signal processing scheme is given. A polarization decoded technology based on the space range on Poincare polarization sphere is studied. The simulation results indicate that this signal not only has the characteristic of LFM, but also has low probability of interception (LPI) and the improved anti jamming ability because the pseudorandom code and polarization modulation technology are adopted.

关 键 词：极化调制 线性调频 脉冲压缩 相关检测 

分 类 号：TN957.51[电子电信—信号与信息处理] TN973.3[电子电信—信息与通信工程]