摘要
近年来,一种多chirp脉冲合成大带宽的技术受到雷达界的关注,该方法可以在降低系统瞬时带宽和采样率的情况下提高距离分辨率。针对子脉冲信号的参数如采样率、带宽和频段问隔等可能各不相同的问题,本文提出了采用SINC插值进行信号均匀化重建的方法,并通过前处理方式来实现合成带宽技术在SAR中的应用。最后的仿真实验验证了本文方法适应于参数各不相同的多频段子脉冲信号,能有效提高距离分辨率。
Recently, a synthesized high-bandwidth technique about multi chirp pulse signal is concerned by the radar field. This technique can increase the range resolution ,while reduce the instantaneous bandwidth and sample rate requirements of radar systems. Against the problem that parameters of the child pulse signal such as data sampling rate, bandwidth, and band-step may be different, we provide the method of SINC interpolation to reconstruct the uniform sampling signal in this paper, and fulfill the application of synthesized bandwidth technique in SAR by means of fore treatment. At last, the simulation shows that the method is applicable to the multi band child pulse signals with different parameters, and improves the range resolution effectually.
出处
《信号处理》
CSCD
北大核心
2010年第1期12-16,共5页
Journal of Signal Processing
关键词
合成带宽
距离分辨率
非均匀采样
SINC插值
前处理
Synthesized Bandwidth
Range Profile
non-uniform sampling
SINC interpolation
Fore Treatment
