Detection, parameter estimation and imaging of maneuvering target in wide-band signal  

作　　者：LI YaChao XlNG MengDao ZHANG Long BAO Zheng 

机构地区：[1]Key Laboratory for Radar Signal Processing [2] Xidian University [3] Shaanxi 710071 [4] China

出　　处：《Science in China(Series F)》2009年第6期1015-1026,共12页中国科学（F辑英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant No 60502044);the Program for New Century Excellent Talents in University (Grant No NCET-06-0861)

摘　　要：The signal-to-noise ratio may be increased by the cross-range coherence integration so as to detect the moving target in low signal-to-noise ratio （SNR） condition.But, the radial velocity, acceleration and the change of acceleration due to the maneuvering motion of target may induce serious range migration and cross-range high-order phase terms leading to the unfocused cross-range image, the reduction of signal-noise ratio and the invalidation of target detection.Therefore, in order to solve these problems, this paper proposes a new method based on the adjacent correlation and scale transform methods for detection, parameters estimation and imaging of maneuvering targets in wide-band signal.This method can align the range and remove the cross-range high-order phase terms induced by the radial motion of target, enabling us to detect the target and estimate its moving parameters better.Finally, the simulated target is used to confirm that the method proposed by this paper can perfectly detect the maneuvering target in low signal-to-noise ratio condition, estimate its motion parameters and obtain an ISAR image of target.The signal-to-noise ratio may be increased by the cross-range coherence integration so as to detect the moving target in low signal-to-noise ratio （SNR） condition.But, the radial velocity, acceleration and the change of acceleration due to the maneuvering motion of target may induce serious range migration and cross-range high-order phase terms leading to the unfocused cross-range image, the reduction of signal-noise ratio and the invalidation of target detection.Therefore, in order to solve these problems, this paper proposes a new method based on the adjacent correlation and scale transform methods for detection, parameters estimation and imaging of maneuvering targets in wide-band signal.This method can align the range and remove the cross-range high-order phase terms induced by the radial motion of target, enabling us to detect the target and estimate its moving parameters better.Finally, the simulated target is used to confirm that the method proposed by this paper can perfectly detect the maneuvering target in low signal-to-noise ratio condition, estimate its motion parameters and obtain an ISAR image of target.

关 键 词：inverse synthetic aperture radar （ISAR） wide-band signal moving target detection parameter estimation signal-to-noise ratio 

分 类 号：TN957.52[电子电信—信号与信息处理] TN911.7[电子电信—信息与通信工程]