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arXiv 2101.08982eess.SP
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利用圆柱形MIMO阵列实现高效近场成像

Efficient Near-Field Imaging Using Cylindrical MIMO Arrays

Shiyong Li, Shuoguang Wang, Moeness G. Amin, Guoqiang Zhao

摘要:

基于多输入多输出(MIMO)阵列的毫米波(MMW)成像技术在隐蔽武器探测中具有广阔的应用前景。针对发射天线和接收天线在垂直和水平圆弧方向上均布的圆柱形MIMO阵列方案,提出了一种基于波数域处理的近场成像算法。通过零填充离散时间傅里叶变换分析了与MIMO阵列相关的频谱混叠。分析表明,欠采样阵列可以用于波数域算法恢复毫米波图像。描述了MIMO阵列天线阵元间距的要求。数值模拟以及与反投影(BP)算法的比较,证明了所提出的方法的有效性。

英文摘要:

Multiple-input multiple-output (MIMO) array based millimeter-wave (MMW) imaging has a tangible prospect in applications of concealed weapons detection. A near-field imaging algorithm based on wavenumber domain processing is proposed for a cylindrical MIMO array scheme with uniformly spaced transmit and receive antennas over both the vertical and horizontal-arc directions. The spectrum aliasing associated with the proposed MIMO array is analyzed through a zero-filling discrete-time Fourier transform. The analysis shows that an undersampled array can be used in recovering the MMW image by a wavenumber domain algorithm. The requirements for the antenna inter-element spacing of the MIMO array are delineated. Numerical simulations as well as comparisons with the backprojection (BP) algorithm are provided to demonstrate the effectiveness of the proposed method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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