失配状态下的双线阵波束形成研究

Beamforming methods research on dual-line array with mismatch space between the two line arrays

基于双线阵在阵间距失配状态下左右舷分辨性能会急剧下降的事实,利用延时相加和延时相减两种波束形成方法,分别推导了理想状态下双线阵的波束形成和阵间距失配状态下波束形成的方向指向性函数；分析了理想状态下和阵间距失配状态下延时相加和延时相减两种波束形成方法的左右舷分辨性能。理论分析表明延时相减波束形成具有较好的左右舷分辨性能。最后用海试数据验证了理论分析结果的正确性。

The capability of port/starboard discrimination of dual-line array will be seriously degraded when the space between the two lines of the dual-line array is mismatched. The beam pattern of the delay-sum and delay-subtract beamforming is deduced and the port/starboard discrimination of the delay-sum and delay-subtract beamforming is also studied both under the ideal status and the status under which the space between the two lines of the dual-line array is mismatched. Analysis results show the delay-subtract beamforming has better capability of port/starboard discrimination. At last, the sea trial results demonstrate the theoretical results.