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
