The range and angle information of the frequency diverse array (FDA) cannot be exclusively determined at the output of the array because of the range-angle coupled transmit beampattern. The best decoupling approach is to form a dot-shaped beam-pattern rather than the S-shaped beampattern of the basic FDA. Considering the degradation of the output signal-to-interference-plus-noise ratio (SINR) caused by the coupled beampattern, we propose a dot-shaped beamforming method based on the analyzed overlapping subarray-based using a logarithmic offset and a subarray-based planar FDA using a logarithmically increasing frequency offset, with elements transmitting at multiple frequencies. Several simulation results demonstrate the effectiveness of the proposed method in transmit energy focusing, sidelobe suppression and array resolution.

中文翻译：

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基于OSB log-FDA的点形波束形成分析

由于距离角度耦合的发射波束图，不能完全在阵列的输出端确定频率分集阵列（FDA）的距离和角度信息。最好的去耦方法是形成点形光束图案，而不是基本FDA的S形光束图案。考虑到耦合波束图引起的输出信号干扰加噪声比（SINR）的下降，我们提出了一种基于对数偏移和基于子阵列的分析重叠子阵列的点形波束形成方法。平面FDA使用对数增加的频偏，元件以多个频率传输。若干仿真结果证明了该方法在发射能量聚焦，旁瓣抑制和阵列分辨率方面的有效性。