By utilizing a tiny frequency increment across the array elements, frequency diverse array (FDA) generates a beampattern possessing the property of range-angle-dependent. However, the beampattern of the conventional FDA is “S”-shaped, which means it is coupled in range-angle domains, resulting in low target indication accuracy and poor jamming suppression ability. In this paper, taking advantage of multiple-input multiple-output (MIMO) technique and multiple matched filters, a new FDA framework using Hamming window weighted linear frequency increments is proposed. Correct FDA-MIMO framework and multiple matched filters are used to remove the influence of the time parameter. A range-angle-decoupled beampattern with sharp pencil-shaped mainlobe and low sidelobe levels can be produced. Comparing with the existing FDA-decoupled transmit beampattern design methods, a more focusing beampattern can be achieved. Simulation results validate the superiority of the proposed system.

中文翻译：

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带有汉明窗加权线性频率增量的FDA-MIMO波束图合成

通过利用整个阵列元件上微小的频率增量，频率分集​​阵列（FDA）产生了具有与范围角度相关的特性的波束图。但是，传统FDA的光束图是“ S”形的，这意味着它耦合在射程角域中，导致目标指示精度低和干扰抑制能力差。本文利用多输入多输出（MIMO）技术和多个匹配滤波器，提出了一种使用汉明窗加权线性频率增量的新FDA框架。正确的FDA-MIMO框架和多个匹配的滤波器用于消除时间参数的影响。可以产生具有锐利的笔形主瓣和低旁瓣水平的射程角分离波束图案。与现有的FDA解耦的发射波束图设计方法相比，可以实现更加聚焦的波束图。仿真结果验证了所提出系统的优越性。