摘要
根据子波变换所具有良好的时间－频率局域性和逼近性，研究基于子波变换谱估计的频率步进毫米波雷达目标成像方法。由于选用了波动性、衰减性和带通性能好的已调高斯函数作为子波基函数构成一组特性较理想的带通滤波器，对信号进行正交处理，其子波变换同时给出了同相和正交分量。通过信号的功率谱估计，从而获得更好的雷达目标一维距离像。仿真结果表明。
Based on the time frequency localization and approach of wavelet transform, a study is made on the imaging of target range profiles of step frequency MMW radar with wavelet. The band pass filtering function is implemented using modulated Gaussian wavelet transform. The signal can be orthogonalized the wavelet transform can provide the in phase and quadrature vector. The method can obtain good range profiles. The simulative results indicate that spectrum estimation based on wavelet transformation has better distinguishing rate.
出处
《南京理工大学学报》
EI
CAS
CSCD
1999年第2期133-136,共4页
Journal of Nanjing University of Science and Technology
关键词
雷达信号
图象处理
谱估计
子波变换
毫米波雷达
radar signals, image processing, spectroscopy,estimations
wavelet transform
