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基于模态分解思想的波束形成是一种很好的圆环形波束形成方法,为了将其运用到宽带波束形成中,提出了一种逼近期望波束的抗白噪声的稳健宽带波束形成算法。该方法利用模态分解方法设计出模态域的稳健模态系数,根据在不同模态阶数下生成不同波束的情况下,利用二阶锥优化算法在宽带波束性能指标之间获得比阵元域稳健性方法更合理的折衷,从而为设计者根据对波束性能指标需求提供了选择的平台和操作的空间。计算机仿真验证了该方法可以实现我们期望得到的恒定束宽波束图,并且比传统的二阶锥恒定束宽方法有更好的效果。实验也验证了该方法的可行性。
Based on the idea of modal decomposition, beamforming is a very good method of circular beamforming. In order to apply it to wideband beamforming, a robust broadband beamforming algorithm is proposed. The method uses the modal decomposition method to design the mode modal coefficients in the modal domain. According to the different order of the beams, the second-order cone optimization algorithm is used to obtain the ratio of the array elements A more reasonable trade-off between domain robustness methods provides the designer with a platform and operational space to choose from based on the need for beam performance metrics. Computer simulation shows that this method can achieve the constant beamwidth we expect, and it is more effective than the traditional second-order cone beamwidth method. Experiments also verify the feasibility of the method.