摘要
随机频率步进雷达信号受到非连续频谱和随机调制的影响,造成合成距离像的旁瓣较高。针对该问题,根据贝叶斯准则进行最小化代价函数得到高分辨离散傅里叶变换矩阵,将缺失频点相位进行外推并获得距离像的重建恢复,同时能够对距离旁瓣进行有效抑制。仿真分析表明,所提方法具有较好的旁瓣抑制性能和估计精度。
For random frequency step radar signal,the sidelobes of high resolution range is very high with the effects of discontinuous frequency spectrum and random modulation.Discrete Fourier Transform（DFT）is processed according to the Bayesian Criteria and minimized the cost function,which is realized by iteration processing.The phase of loss frequency points are extrapolated and recovered,and then the range sidelobes are suppressed effectively at the same time.Finally the simulation analyses demonstrate that the proposed method is of better suppressed performance and higher estimated accuracy.
出处
《制导与引信》
2015年第2期44-48,共5页
Guidance & Fuze
关键词
频率步进
内插外推
旁瓣抑制
frequency step
interpolation and extrapolation
sideband suppression
