时分MIMO波束形成的超指令模式选择性OTHR

Y. Abramovich, G. S. Antonio, G. Frazer, Charlie G. Williams
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引用次数: 3

摘要

本文提出了超指令自适应模式选择处理在过采样二维发射(Tx)和接收(Rx)天线阵列中,由MIMO雷达技术实现,用于天波OTHR应用。通过考虑两个主要原则来控制Tx天线阵列中的实际无功功率:(1)避免常规波束形成(单一波形)子阵列中的极端转向角;(2)使用时分MIMO波形集,不同时传输来自Tx阵列相位中心的不同(正交)MIMO波形,间隔小于雷达波长的一半。我们根据[1]考虑传播模式,以证明所提出的技术在孔径明显小于[1]的Tx和Rx天线阵列中的实用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Superdirective mode selective OTHR with time-division MIMO beamforming
This paper proposes superdirective adaptive mode-selective processing in oversampled 2D transmitting (Tx) and receiving (Rx) antenna arrays, enabled by MIMO radar technology, for skywave OTHR applications. The actual reactive power in Tx antenna arrays is controlled by considering two main principles: (1) avoiding extreme steering angles in conventionally beamformed (for a single waveform) sub-arrays and (2) using time-division MIMO waveform sets with no simultaneous transmissions of different (orthogonal) MIMO waveforms from TX array phase centers separated by less than half the radar wavelength. We consider the propagation modes as per [1] to demonstrate the utility of the proposed technique for Tx and Rx antenna arrays with apertures significantly smaller than those introduced in [1].
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