一种改进的多子阵合成孔径声纳波数域成像算法  

An improved wavenumber domain algorithm for multiple receiver synthetic aperture sonar imaging

作　　者：姜涛[1] 汪海涛 田振[3] 

机构地区：[1]海军工程大学科研部 [2]92681部队 [3]海军工程大学电子工程学院

出　　处：《海军工程大学学报》2014年第4期27-31,共5页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(61072092;61101205;41304015)

摘　　要：针对多子阵合成孔径声纳(SAS)传统的扩展波数域(ωk)算法中STOLT插值误差引入的相位误差,提出了一种改进的适用于多子阵SAS的ωk成像算法。该算法继承了传统的扩展ωk算法能够与运动补偿相结合的优点,通过对多子阵SAS的双根号形式距离历程进行近似和单基等效化,将多子阵的回波信号等效为单阵收发合置信号,针对扩展ωk算法中STOLT变换可能引入的插值误差,通过引入新的一致距离徙动校正因子,补偿了插值导致的相位误差,实现了多子阵SAS图像的重建。仿真实验表明了该算法的有效性。Aimed at the phase error caused by STOLT interpolation in the extended wavenumber do-main （ωk） algorithm ,an improved algorithm is proposed based on the extended ωk algorithm .The al-gorithm inherits advantages from the traditional extended ωk algorithm being able to combine with motion correction for the imaging of multiple receiver synthetic aperture sonar （SAS） in the case of no stop-hop-stop .T he point target response of multiple receiver SAS is transferred to the signal response si-mi-lar to the monostatic SAS by range history approximation and miltistatic-to-monostatic equiva-lence . By introducing a novel bulk range migration correction factor , the phase error caused by STOLT interpolation in the extended ωk algorithm is compensated sufficiently .Finally ,the image of multiple receiver SAS is perfectly reconstructed .T he simulation results show the proposed algorithm is effective .

关 键 词：合成孔径声纳 多子阵 波数域算法 一致距离徙动校正 

分 类 号：TN958[电子电信—信号与信息处理]