SONAR

作品数：108被引量：116H指数：5
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Range-instantaneous Doppler imaging of inverse synthetic aperture sonar
《声学技术》2003年第z1期48-51,共4页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) 
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...
关键词：INVERSE SYNTHETIC APERTURE SONAR (ISAS)  range-instantaneous Doppler  maneuvering target  TIME-FREQUENCY analysis 
Motion estimation in wide band synthetic aperture sonar based on the raw echo data using the method of displaced phase center antenna被引量：3
《声学技术》2003年第z1期56-59,共4页JIANG Xiaokui, SUN Chao (Member, IEEE), FANG Jie (Institute of Acoustic Engineering, Northwestern Polytechnical University, Xi’an 710072, China) 
Phase errors in synthetic aperture sonar (SAS) imaging must be reduced to less than one eighth of a wavelength so as to avoid image destruction. Most of the phase errors occur as a result of platform motion errors, fo...
关键词：sonar  SYNTHETIC APERTURE SONAR (SAS)  motion estimation  RAW data  DPCA. 
Implementation of broadband low-sidelobe beamforming in time domain被引量：2
《声学技术》2003年第z1期19-23,共5页YANG Yixin~1, SUN Chao, MA Yuanliang (Institute of Acoustic Engineering, Northwestern Polytechnical University, Xi’an 710072, China) 
ThisworkwassupportedbyNationalNatureScienceFoundationofChina(Grantnumber :69980 2 0 10 )
In modern active and passive sonar systems, broadband beamforming for acoustic arrays is widely used to suppress unwanted interference and to detect target signals of interest. A broadband low sidelobe beamforming sch...
关键词：BROADBAND beamforming  low SIDELOBE level  FIR filter  time domain  SONAR 
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