强相干干扰下基于二阶锥规划的圆弧阵宽带二维成像-电子与信息学报.PDF

第 36 卷第 11 期 电 子 与 信 息 学 报 Vol.36No.11 2014 年 11 月 Journal of Electronics Information Technology Nov. 2014 强相干干扰下基于二阶锥规划的圆弧阵宽带二维成像 黄 聪 孙大军* 张殿伦 滕婷婷 (哈尔滨工程大学水声技术重点实验室 哈尔滨 150001) (哈尔滨工程大学水声工程学院 哈尔滨 150001) 摘 要：该文针对水下目标 2 维成像在强相干干扰情况下，目标亮点容易被淹没的问题，以及圆弧阵波束的高旁瓣 给图像检测带来较多虚警的缺陷，提出基于二阶锥规划的宽带 2 维成像优化方法。该方法在对相干干扰抑制的同时， 很好地控制了波束的旁瓣。分析了 2 维成像算法流程中由于时域滑窗导致阵列的接收信号矢量与阵列流形不同，造 成二阶锥规划设计的权值与阵列的接收信号矢量失配，旁瓣控制和零陷设计无法满足设计的要求。针对该问题提出 利用计算出的滑窗理论阵列的接收信号矢量代替阵列流形来进行二阶锥权值设计的方法，通过改进的二阶锥权值， 将波束优化与圆弧阵的 2 维成像优化相结合。计算机仿真和水池实验都验证了该方法的有效性。 关键词：声呐；2 维成像；二阶锥规划；旁瓣控制；干扰抑制 中图分类号：U666.72; TN911.7 文献标识码： A 文章编号：1009-5896(2014)11-2633-07 DOI: 10.3724/SP.J.1146.2013.01796 Wideband Two-dimensional Imaging with Arc Array Based on Second-order Cone Programming under Strong Coherent Interference Huang Cong Sun Da-jun Zhang Dian-lun Teng Ting-ting (Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University, Harbin 150001, China) (College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China) Abstract: To solve the problem that in two-dimensional imaging the target under water is easily hidden by the strong coherent interference, and high side lobe of arc array beam pattern causes more false alarm, an optimized two-dimensional imaging method based on second-order cone programming is proposed. Not only the strong coherent interference is suppressed, but also the side lobe is controlled well with the method. The issue that the sliding window in time domain leads to the difference between the steering vector and array manifold is analyzed, which causes the mismatch between the weights