稳健的宽带恒定束宽波束形成算法

发布时间：2018-06-23 08:47

本文选题：宽带波束形成 + 稳健性　；参考：《信号处理》2014年07期

【摘要】：针对运动目标入射及存在信号波达方向(DOA)估计误差时传统波束形成器性能下降的问题,提出一种稳健的宽带恒定束宽波束形成算法。该算法首先在目标入射角可能存在的范围内选取离散点,设定相应的期望及零陷响应,再结合空间响应变化(SRV)约束,将算法在信号带宽内不同频点的阵列响应约束简化为对某一参考频点的约束,并约束权矢量模值以抑制随机噪声,最后分别利用内点法和拉格朗日乘子法求解最优权矢量,实现稳健的宽带恒定束宽波束形成。实验结果表明该算法可以有效实现对运动目标的空域滤波,具有良好的恒定束宽特性及较高的阵列输出性能。
[Abstract]:A robust wideband constant beamwidth beamforming algorithm is proposed to solve the problem that the performance of traditional beamformer is degraded when the incident target is incident and the DOA estimation error exists. The algorithm firstly selects discrete points within the range of possible incidence angle of the target, sets corresponding expectation and zero trapping response, and then combines spatial response variation (SRV) constraints. The array response constraints of the algorithm at different frequency points in the signal bandwidth are simplified as the constraints on a certain reference frequency point, and the weight vector modulus is constrained to suppress random noise. Finally, the optimal weight vector is solved by the interior point method and the Lagrange multiplier method, respectively. Robust broadband constant beamwidth beamforming is achieved. Experimental results show that the proposed algorithm can effectively realize spatial filtering of moving targets and has good constant beam width and high array output performance.
【作者单位】：解放军信息工程大学;解放军61062部队;
【基金】：国家863高技术研究发展计划(2011AA7031015)资助项目
【分类号】：TN911.7

【相似文献】