有缺陷的多接收阵合成孔径声呐成像技术

Imaging of Multi-receiver SAS with Faulty Array Element

试验过程中不可预测的原因可能会导致接收基阵中的一个或多个接收阵元失效,进而严重影响整个合成孔径声呐(SAS)系统的性能。基于此,提出了一种有缺陷的多接收阵SAS成像方法,首先基于线性预测方法对失效阵元的回波信号进行重构,然后再进行合成孔径成像处理。该方法可以较好地解决阵元失效带来的图像畸变问题,仿真试验验证了其有效性和可行性。

One or several array element in array receivers may lose efficacy due to unpredictable factors during testing process, and hence seriously affect performance of whole synthetic aperture sonar （SAS） system. This paper proposes an imaging method of multi-receiver SAS with faulty array element to resolve the image distortion caused by the invalid receivers. In this method, the signal from the invalid array element is reconstructed based on linear prediction, then synthetic aperture imaging processing is performed. Simulation results show the validity and feasibility of the proposed method.