摘要
测速补偿是宽带雷达信号处理的关键。目前宽带雷达系统一般采用窄带信号测速、宽带信号成像,导致工作效率降低、体系复杂。深入研究了一维距离像互相关测速法,提出了实包络互相关和复包络互相关两种处理方法,并详细分析了二者的区别,给出了理论测速性能。理论分析和仿真表明,采用距离像复包络互相关处理,即使距离像存在严重波形发散,无需先进行粗测速补偿,仍能精确测速且具有良好的抗噪性能,使得宽带频率步进雷达实时自测速补偿成为可能。
Velocity measurement and compensation are the key techniques of high resolution radar signal processing. Nowadays two kinds of signals usually are simultaneously utilized in the radar system: the narrowband signal for measuring velocity and the wideband signal only for imaging, which lead to more complexity and lower efficiency. A novel method for velocity measurement based on high resolution range profile cross-correlation is proposed firstly. Two modes defined as real envelope cross-correlation and complex envelope cross-correlation are brought forward in detail, and the theoretical performance is presented. Both theory analysis and simulation show that although range profile with serious spreading and distortion, complex envelope cross-correlation processing can still receive high accurate estimation and good anti-noise performance without rough motion compensation. It can make some crucial functions such as real-time independent velocity measurement and compensation possible.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2008年第11期2112-2115,共4页
Systems Engineering and Electronics
基金
国家部委项目资助课题(51301020403)
关键词
高分辨距离像
实包络
复包络
互相关
运动补偿
high resolution range profile
real envelope
complex envelope
cross-correlation
motion compensation