摘要
为提高雷达抗干扰能力,采用内插阵列变换的方法来对随机频率步进数据重构虚拟均匀步进频数据的协方差矩阵,再利用求根MUSIC算法获取目标的散射中心。平板的电磁散射数据验证了该方法对实际目标的有效性。通过蒙特卡罗仿真分析了在不同信噪比下提取散射中心的性能,结果表明该方法简单可靠,可用于任意步长变换的步进频信号,具有较强的适应能力。
The step length of the stepped frequency radar may change randomly to improve the radio-frequency immunity.A method called interpolated array transform is presented in this paper to reconstruct the covariance marix of virtual linear stepped frequency data.Then using the ROOTMUSIC algorithm,the target scatter center could be obtained.Through the electromagnetism data of plate,the paper has proved that the approach is effective for the real target.Through the Monte Carlo simulation,the capability of obtaining the scatter center under the different signal noise ratio is analyzed.The result shows the proposed method is simple and robust,and can be applied for stepped frequency signal which the step length is random.
出处
《电波科学学报》
EI
CSCD
北大核心
2010年第2期265-270,共6页
Chinese Journal of Radio Science
