摘要
该文提出了一种高机动目标宽带信号检测与运动参数估计方法,即先通过相邻相关对目标回波进行降阶处理,然后将其变换到距离频域,利用广义二阶keystone变换去除距离弯曲,接着对一个距离单元信号进行时间调频率变换并估计方位向的调频率,构造相位补偿函数,对广义二阶keystone变换后的信号进行补偿,再进行第二次广义二阶keystone变换,最后通过距离IFFT和方位FFT对目标进行检测,通过估计的参数可以获得目标的运动参数。仿真和实测数据验证了该方法的有效性。
A new method for detection of maneuvering target in wideband signal and for estimation of its moving parameters is proposed. Firstly the adjacent correlation is employed to decrease the order of the echo signal. Then the signal is transformed into range frequency domain and the general two-order keystone transform is used to eliminate range curve. Thirdly a range frequency cell is selected to estimate the azimuth frequency modulation rate via the time-chirp rate transform. Fourthly a phase compensation function is constructed for phase correction. Finally the general second-order keystone transform is used again and the range IFFT and azimuth FFT are performed so that the target detection is feasible. The moving parameters can be obtained by the estimates. In the end, simulated and raw data results confirm the effectiveness of the proposed method.
出处
《电子与信息学报》
EI
CSCD
北大核心
2009年第6期1283-1287,共5页
Journal of Electronics & Information Technology
基金
新世纪优秀人才支持计划(NCET-06-0861)
教育部长江学者和创新团队支持计划(IRT0645)资助课题
