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arXiv 1902.07053cs.ITmath.IT
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大规模MIMO系统中的干扰抑制

Jamming Suppression in Massive MIMO Systems

Hossein Akhlaghpasand, Emil Björnson, S. Mohammad Razavizadeh

摘要:

在本文中,我们提出了一个框架,用于保护上行链路传输的大规模多输入多输出(mMIMO)系统的干扰攻击。我们的框架包括一个新的最小均方误差为基础的干扰抑制(MMSE-JS)估计信道训练和线性迫零干扰抑制(ZF JS)检测器的上行链路组合。MMSE-JS利用一些故意未使用的导频来减少干扰机造成的导频污染。ZFJS在检测合法用户的数据符号的过程中抑制干扰。拟议框架的实施是切实可行的,由于计算MMSE-JS和ZFJS的复杂度是线性的已经使用28 nm FD-SOI制造了具有与ZF JS相同复杂度的线性检测器(完全耗尽绝缘体上硅)技术和[13]中的Xilinx Virtex-7 XC 7VX 690 T FPGA用于mMIMO系统。我们的分析表明,干扰不会显着影响的mMIMO系统配备了MMSE-JS和ZFJS的组合的性能。数值结果证实了我们的分析。

英文摘要:

In this paper, we propose a framework for protecting the uplink transmission of a massive multiple-input multiple-output (mMIMO) system from a jamming attack. Our framework includes a novel minimum mean-squared error based jamming suppression (MMSE-JS) estimator for channel training and a linear zero-forcing jamming suppression (ZFJS) detector for uplink combining. The MMSE-JS exploits some intentionally unused pilots to reduce the pilot contamination caused by the jammer. The ZFJS suppresses the jamming interference during the detection of the legitimate users' data symbols. The implementation of the proposed framework is practical, since the complexities of computing the MMSE-JS and the ZFJS are linear (not exponential) with respect to the number of antennas at the base station and linear detectors with the same complexities as the ZFJS have been already fabricated using 28 nm FD-SOI (Fully Depleted Silicon On Insulator) technology in [12] and Xilinx Virtex-7 XC7VX690T FPGA in [13] for the mMIMO systems. Our analysis shows that the jammer cannot dramatically affect the performance of a mMIMO system equipped with the combination of MMSE-JS and ZFJS. Numerical results confirm our analysis.

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