Design of Large Effective Apertures for Millimeter Wave Systems Using a Sparse Array of Subarrays
Design of Large Effective Apertures for Millimeter Wave Systems Using a Sparse Array of Subarrays
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DOI：
10.1109/tsp.2019.2955828
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发表时间：
2019-07
影响因子：
5.4
通讯作者：
Anant Gupta;Upamanyu Madhow;A. Arbabian;A. Sadri
中科院分区：
文献类型：
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作者：
Anant Gupta;Upamanyu Madhow;A. Arbabian;A. Sadri
我们研究了利用子阵列的稀疏阵列合成一个大有效孔径。我们采用了一个多目标优化框架，将子阵列放置在由形状因素约束决定的规定区域内，通过将子阵列间隔到稀疏放置产生的光栅和侧瓣来获得较小的波束宽度。我们评估了我们的设计对于一个或多个源的方位估计的基本问题的性能，并将性能与估计理论界限进行了比较。我们的平片架构是由最近在毫米波频段中中等大小的天线阵列（扮演子阵列的角色）的低成本硬件实现的进展所驱动的，我们的数值示例是基于60 GHz未授权频段中的16元（$4 \ × 4$）子阵列。
We investigate synthesis of a large effective aperture using a sparse array of subarrays. We employ a multi-objective optimization framework for placement of subarrays within a prescribed area dictated by form factor constraints, trading off the smaller beam width obtained by spacing out the subarrays against the grating and side lobes created by sparse placement. We assess the performance of our designs for the fundamental problem of bearing estimation for one or more sources, comparing performance against estimation-theoretic bounds. Our tiled architecture is motivated by recent progress in low-cost hardware realizations of moderately sized antenna arrays (which play the role of subarrays) in the millimeter wave band, and our numerical examples are based on 16-element ($4 \times 4$) subarrays in the 60 GHz unlicensed band.