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arXiv 1907.04427eess.SP
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mmWave混合MIMO系统中基于离格Dirichlet核的信道估计

Channel Estimation in mmWave Hybrid MIMO System via Off-Grid Dirichlet Kernels

Chethan Kumar Anjinappa, You Zhou, Yavuz Yapici, Dror Baron, Ismail Guvenc

摘要:

在本文中,我们解决了信道估计毫米波混合多输入多输出系统考虑离网效应。特别是,我们假设空间参数可以在角度域中取任何值,并且不需要落在预定义的离散角度上。我们没有增加离散化点的数量来对抗离网效应,而是在傅立叶域中使用隐式Dirichlet核结构,这是传统的压缩感知方法所不使用的。我们提出了基于正交匹配追踪(OMP)的贪婪低复杂度算法,我们的核心思想是使用离散傅里叶变换的估计来遍历狄利克雷核峰值。我们证明了我们提出的算法相比,标准的OMP重建的有效性。数值结果表明,我们提出的算法获得较小的重建误差时,离网效应占。

英文摘要:

In this paper, we tackle channel estimation in millimeter-wave hybrid multiple-input multiple-output systems by considering off-grid effects. In particular, we assume that spatial parameters can take any value in the angular domain, and need not fall on predefined discretized angles. Instead of increasing the number of discretized points to combat off-grid effects, we use implicit Dirichlet kernel structure in the Fourier domain, which conventional compressed sensing methods do not use. We propose greedy low-complexity algorithms based on orthogonal matching pursuit (OMP); our core idea is to traverse the Dirichlet kernel peak using estimates of the discrete Fourier transform. We demonstrate the efficacy of our proposed algorithms compared to standard OMP reconstruction. Numerical results show that our proposed algorithms obtain smaller reconstruction errors when off-grid effects are accounted for.

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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