Improved spectrum reconstruction technique based on chirp rate modulation in stepped-frequency SAR

作     者：GAO WenBin DING ZeGang ZHU DongLin ZENG Tao LONG Teng 

作者机构：Radar Research Laboratory School of Information and Electronics 

出 版 物：《Science China(Information Sciences)》 (中国科学:信息科学(英文版))

年 卷 期：2015年第58卷第10期

页      面：148-158页

核心收录：

学科分类：11[军事学] 0810[工学-信息与通信工程] 1105[军事学-军队指挥学] 08[工学] 081002[工学-信号与信息处理] 110503[军事学-军事通信学] 

基　　金：supported by National Natural Science Foundation of China(Grant Nos.61370017 61032009 61120106004) 

主　　题：chirp rate modulation(CRM) spectral efficiency improved spectrum reconstruction technique(ISRT) spectrum reconstruction stepped- 

摘      要：To improve the efficiencies of the traditional spectrum reconstruction techniques, an improved spectrum reconstruction technique(ISRT) based on chirp rate modulation(CRM) is proposed. With the help of a CRM operation, a reconstructed wideband signal with a narrow pulse width can be obtained. Compared with the traditional time domain spectrum reconstruction technique(TSRT), ISRT is less time-consuming since much less samples are needed. Compared with the traditional frequency domain spectrum reconstruction technique(FSRT), the reconstructed signal is a chirp signal, which has no limitation on the subsequent imaging *** is more, processing steps of ISRT are optimized, and the computational burden is less than that of TSRT and FSRT. Both simulation results and real data processing have verified the validity of ISRT.