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arXiv 1811.01554eess.SP
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基于随机梯度下降的二维DoA估计与压缩天线阵的组合矩阵设计

Combining Matrix Design for 2D DoA Estimation with Compressive Antenna Arrays using Stochastic Gradient Descent

Sankalp Pawar, Sebastian Semper, Florian Römer

摘要:

最近,压缩天线阵列已经被考虑用于具有降低的硬件复杂度的DoA估计。通过利用压缩感知,这种阵列采用线性组合网络来组合来自模拟RF域中的较大天线元件集合的信号。在本文中,我们开发了一种设计方法的基础上的空间相关函数(SCF)的压缩和未压缩的阵列之间的误差最小化,导致两个阵列的估计性能尽可能接近。所提出的设计是基于无网格随机梯度下降(SGD)优化。除了所提出的方法的低计算成本,我们数值计算表明,所得到的组合矩阵比以前的方法和从高斯系综产生的组合矩阵产生的更好地执行。

英文摘要:

Recently, compressive antenna arrays have been considered for DoA estimation with reduced hardware complexity. By utilizing compressive sensing, such arrays employ a linear combining network to combine signals from a larger set of antenna elements in the analog RF domain. In this paper, we develop a design approach based on the minimization of error between spatial correlation function (SCF) of the compressive and the uncompressed array resulting in the estimation performance of the two arrays to be as close as possible. The proposed design is based on grid-free stochastic gradient descent (SGD) optimization. In addition to a low computational cost for the proposed method, we show numerically that the resulting combining matrices perform better than the ones generated by a previous approach and combining matrices generated from a Gaussian ensemble.

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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