一种稳健恒定束宽宽波束形成算法  

A Robust Constant Beamwidth Wide-Beamforming Algorithm

作　　者：张远驰 胡进 ZHANG Yuanchi;HU Jin(The 724th Research Institute of China Shipbuilding Group Corporation,Nanjing 210000,China)

机构地区：[1]中国船舶集团有限公司第七二四研究所,江苏南京210000

出　　处：《数字通信世界》2024年第2期6-9,共4页Digital Communication World

摘　　要：传统宽带波束形成算法在导向矢量失配时输出性能下降,为解决该问题,文章提出一种稳健恒定束宽波束形成算法。该算法首先构造与快拍数相关的对角加载函数;其次,基于空域积分思想,结合入射信号的方向误差范围估计期望信号的实际入射方向,并结合构造的对角加载系数生成优化波束加权系数;最后,联合优化后的波束权值与FIR滤波器系数完成宽带波束响应的全局优化设计。经仿真实验验证,相比于传统分布设计法的时域宽带波束形成,文中方法可以得到较理想的恒定宽带主瓣响应和较低的旁瓣电平,同时在期望信号导向矢量失配情况下,仍有较好的输出信干噪比。The proposed algorithm addresses limitations in conventional wideband beamforming techniques caused by mismatched guiding vectors.It begins by creating a diagonal loading function related to the snapshot count.Then,it estimates the actual incident direction of the desired signal through the directional error range of the incident signal.The optimized beam weighting coefficients are generated by combining the constructed diagonal loading coefficients.Finally,these optimized beam weighting values,along with the FIR filter coefficients,solve for the global optimal design of the broadband beam response.Simulation results confirm that compared to traditional time-domain wideband beamforming,this approach achieves a more consistent broadband main lobe response and reduced side lobe levels.Moreover,it maintains a higher output signal-to-noise ratio even in scenarios with mismatched desired signal-oriented vectors.

关 键 词：恒定束宽波束形成 广义线性组合 全局优化设计 FIR滤波器设计 

分 类 号：TN911.7[电子电信—通信与信息系统]