极化捷变LFM脉冲压缩信号的相关检测  

Study on correlative detection of LFM pulse compression signal with polarization agility

作　　者：宋立众[1] 蒋明[1] 孟宪德[1] 乔晓林[1] 

机构地区：[1]哈尔滨工业大学电子与信息技术研究院,黑龙江哈尔滨150001

出　　处：《哈尔滨商业大学学报（自然科学版）》2004年第6期671-674,共4页Journal of Harbin University of Commerce：Natural Sciences Edition

摘　　要：基于电磁波的极化信息,提出了一种脉内线性调频(LFM)、脉间极化编码的新体制雷达信号.该雷达体制采用线性调频信号的脉冲压缩来提高距离分辨率,采用极化编码的相关检测来实现对电子干扰的抑制.建立了该雷达信号的数学模型,提出一种基于Poincare极化球上空间距离的极化解码方法,理论研究和仿真了该信号在噪声干扰和移频干扰条件下的性能.研究结果表明,该信号具有低截获概率特性和较好的抗干扰性能.Based on the polarization information of electromagnetic waves, a new kind of radar signal is proposed in this paper, which characteristic is that Linear Frequency Modulation (LFM) signal is adopted inner pulses and polarization coded modulation is adopted between pulses. LFM signal pulse compression is used to improve the range resolving power and the correlation detection of polarization-coded signal is used to suppress the electronic interferences. The mathematical model of the signal is established. A polarization decoded method based on the space distance on the ooincare sphere is proposed. The performance and characteristic of the signal under noise and the frequency shifting interference are analyzed theoretically and simulated. The research results showed that this new kind of signal has low probability of interception and good anti-jamming ability.

关 键 词：LFM 脉冲压缩信号 雷达信号 相关检测 极化编码 距离分辨率 极化信息 移频 仿真 抗干扰性能 

分 类 号：TN957[电子电信—信号与信息处理] TN911[电子电信—信息与通信工程]