摘要
根据非合作双基地雷达系统的特点,讨论了非合作双基地雷达的基本几何关系与信号能量关系,提出了采用中频数字化技术在频域上实现参考通道与目标通道的快速互相关检测的方法,并在仿真实验中模拟了噪声背景中直达波与目标散射回波的互相关检测与时差估计的过程,实验表明该方法能够在参考通道与目标通道的信噪比相差十分悬殊的情况下,有效地完成微弱目标的检测。蒙特·卡罗仿真分析了信噪比、信号脉宽、带宽和相关脉冲数对互相关时差估计性能的影响。
According to the characteristics of non-cooperative bistatic radar systems, the basic geometrical relationship and signal energy relationship of non-cooperative bistatic radar were introduced, and the method using digital intermediate frequency technique to implement the fast cross-correlation detection of reference channel and target channel in frequency domain was proposed. Some experiments were done to simulate the process of cross-correlation detection and time difference estimation. It is demonstrated that the weak target can be detected by means of the method, when the difference of the signal-noise ratio of the reference channel and target channel is very great. Some parameters affecting the performance of the method, such as the signal-noise ratio, pulse width, bandwidth and pulse number of cross-correlation, were analyzed by Monte Carlo simulation.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第12期3689-3693,共5页
Journal of System Simulation
基金
国家自然科学基金(60672139
60672140)
关键词
双基地雷达
非合作
互相关
时差
bistatic radar
non-cooperative
cross-correlation
time difference
