Non-uniform Linear Sonar Array Based DOA Estimation
In most of available DOA estimation algorithms,such as MUSIC,Capon algorithm,and so on,the Nyquist spatial sampling theory must be followed.Otherwise,ambiguous azimuth angles will appear in DOA estimation results,which lead to inconvenience on the judgment of target azimuth angle.To improve the sonars resolution,a general method is to increase the sensor elements then expand its observation aperture.Accordingly,the cost of manufacturing and data processing are increased.To achieve high resolution with few sensor elements,a kind of non-uniform linear random sonar array is designed,which breaks the Nyquist sampling rate restriction,and then the MUSIC algorithm is used to estimate underwater targets azimuth angles.Simulation results show that,with the same aperture,the performance of non-uniform array is extremely improved over uniform array under high signal SNR.But under low signal SNR,its performance decreases also.Then a mean method is proposed to solve this problem.
DOA estimation underwater target sonar non-uniform array MUSIC
ZHANG Hongmei ZHANG Feng CHEN Mingjie FU Huixuan
College of Automation,Harbin Engineering University,Harbin 150001 Unit 80,forces 96401,Baoji,721000
国际会议
The 33th Chinese Control Conference第33届中国控制会议
南京
英文
7240-7243
2014-07-28（万方平台首次上网日期，不代表论文的发表时间）