Fast Zero Migration Algorithm for Near-Field Sparse MIMO Array Grating Lobe Suppression

IF 4.6 1区 计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Rongqiang Zhu;Jianxiong Zhou;Shiqi Chen;Haiyang Ding
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引用次数: 0

Abstract

Under near-field conditions, spatial undersampling leads to grating lobes in the sparse multiple-input multiple-output (MIMO) array results. A fast zero migration algorithm is developed in this communication for suppressing the grating lobes. In our method, resampling in the wavenumber domain is first achieved on the received data, and then, the fast inverse Fourier transform (FT) and compensation on the image domain is leveraged for achieving zero migration of transceiver array. By applying apodization on the zero migration result, zero spreading is equivalently achieved and thus alleviate the influence of grating lobe spreading under near-field conditions and avoid the ghosts in the imaging results. Benefit from its fast FT-based processing scheme, the method achieves a reduction in computational complexity from O( ${N} ^{4}$ ) to O( ${N} ^{3}$ logN). Both simulated and measured data validate the superiority of the method in effectively suppressing grating lobes and improving the processing efficiency.
近场稀疏MIMO阵列光栅瓣抑制的快速零迁移算法
在近场条件下,空间欠采样会导致稀疏多输入多输出(MIMO)阵列结果中出现光栅瓣。在这种通信中,提出了一种快速零偏移算法来抑制光栅瓣。该方法首先对接收到的数据进行波数域的重采样,然后利用快速傅里叶反变换和图像域的补偿实现收发器阵列的零偏移。通过对零偏移结果进行apodization,等效地实现了零扩散,从而减轻了近场条件下光栅瓣扩散的影响,避免了成像结果中的鬼影。得益于其快速的基于ft的处理方案,该方法将计算复杂度从O(${N} ^{4}$)降低到O(${N} ^{3}$ logN)。仿真数据和实测数据都验证了该方法在有效抑制光栅瓣、提高处理效率方面的优越性。
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来源期刊
CiteScore
10.40
自引率
28.10%
发文量
968
审稿时长
4.7 months
期刊介绍: IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas, including design and development, and in the propagation of electromagnetic waves, including scattering, diffraction, and interaction with continuous media; and applications pertaining to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques
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