Range-instantaneous Doppler imaging of inverse synthetic aperture sonar  

作　　者：XU Jia~(1,2), JIANG Xingzhou~(1), TANG Jingsong~(1) (1. Navy Engineering University, Wuhan 430033, China 2. Department of Electronic Engineering, Beijing 100080, China) 

出　　处：《声学技术》2003年第z1期48-51,共4页Technical Acoustics

摘　　要：Because the existing range-Doppler algorithm in inverse synthetic aperture sonar (ISAS) is based on target model of uniform motion, it may be invalidated for maneuvering targets due to the time-varying changes of both individual scatter′s Doppler and imaging projection plane. To resolve the problem, a new range-instantaneous Doppler imaging method is proposed for imaging maneuvering targets based on time-frequency analysis. The proposed approach is verified using real underwater acoustic data.Because the existing range-Doppler algorithm in inverse synthetic aperture sonar (ISAS) is based on target model of uniform motion, it may be invalidated for maneuvering targets due to the time-varying changes of both individual scatter′s Doppler and imaging projection plane. To resolve the problem, a new range-instantaneous Doppler imaging method is proposed for imaging maneuvering targets based on time-frequency analysis. The proposed approach is verified using real underwater acoustic data.

关 键 词：INVERSE SYNTHETIC APERTURE SONAR (ISAS)  range-instantaneous Doppler  maneuvering target  TIME-FREQUENCY analysis 

分 类 号：TB5[理学—物理]