摘要
针对常规低分辨雷达,研究了编队目标回波的多普勒频率变化特征,提出了采用Radon-WVD法,在时频域对编队目标的整体特性(调频率)进行快速准确的估计。该方法的估计结果不但不受WVD交叉项的影响,而且由于Radon变换的积累特性使得Radon-WVD变换法相对WVD有更好的抗噪声性能。仿真实验验证了该方法的有效性,成功地实现了多架编队飞机架次识别。
In this paper, the variation of Doppler frequency of the group flying targets is analyzed. For low resolution radars, the echoes of targets can be modeled as Linear Frequency Modulated （LFM） signals. A method for detecting the number of targets is proposed. A fast estimation of character of the whole in the time-frequency domain can be obtained through the Radon-WVD （Radon-Wigner Ville Distribution）. The cross-terms of WVD have no influence on the result of the estimation. The method performs well under either higher SNR or lower SNR. The experimental results demonstrate the validity of the method.
出处
《电子与信息学报》
EI
CSCD
北大核心
2007年第3期544-548,共5页
Journal of Electronics & Information Technology
基金
国家部级基金(51483010104DZ0102)资助课题
关键词
低分辨雷达
架次识别
时频分析
RADON变换
Low resolution radar
Target number detection
Time-frequency analysis
Radon transform
