一种基于位移相位中心法的合成孔径声呐运动补偿改进算法

位移相位中心法在合成孔径声呐载体运动误差较小时是一种运动补偿的有效方法，然而，当运动误差较大，不能用相位误差描述时，其补偿效果不佳，本文提出了一种基于位移相位中心法的改进算法，改进算法首先估计时延，在估计和修正时延误差的基础上再估计相位误差，从而修正运动误差对SAS回波的影响，改进算法的适用扩大，更适用于SAS各运动误差较大的情况，文中给出了仿真计算结果，验证算法的有效性。

Improved motion Compensation Algorithm Based on Displaced Phase Center For Synthetic Aperture Sonar

Displaced phase center algorithm is an effective motion compensation method when the motion error along the synthetic aperture is small. However,it does not work well when the motion error is too large to be described by a phase error. An improved motion compensation algorithm based on displaced phase center is given, by which, the time delay is first estimated , the phase error is then estimated after the estimation and correction of the time delay error, and the remaining phase error is finally estimated, and consequently, the influences of movement errors on echoes can be compensated. The improved algorithm can be applied to a larger extent. Simulation results proved the algorithm effective.