摘要
研究运动规律已知的目标脱靶量测量问题.根据多普勒频率和脱靶量的参数方程,提出了一种脱靶量测量的新方法:首先通过时频变换,将目标回波信号表示为以频谱强度为灰度值的图像;然后通过门限检测把灰度图像变为二值图像;最后利用基于随机Hough变换(RHT)的曲线检测,通过求解多普勒频率和脱靶量参数方程获得脱靶量的估计值.打靶实测试验结果表明,该方法能够有效地克服多普勒频率测量误差对脱靶量测量的影响,提高了脱靶量的测量精度.
Measurement of miss distance for targets with known modes of motion is studied.According to the parametric function of Doppler frequency and miss distance parameters, a novel miss distance measuring method is proposed. The echo signal is first represented as a gray image with spectral intensity as its gray values by time-frequency transformation. Then the gray image is converted to a binary image by threshold detection. The estimated value of miss distance is then obtained by solving the parametric function of Doppler frequency and miss distance parameters, based on the randomized Hough transform （RHT）. Experimental results based on real-life data show that the proposed method can effectively overcome the influence of errors of Doppler frequency on the measurement of miss distance and can improve the precision in miss distance measurement.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2005年第7期625-627,645,共4页
Transactions of Beijing Institute of Technology
基金
国家部委预研项目(0200408)
