A Pragmatic Anti-Interference Algorithm for Hybrid Beamforming in Millimeter Wave MIMO Systems

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS IEEE Communications Letters Pub Date : 2024-09-30 DOI:10.1109/LCOMM.2024.3470226

Zhi Wang;Peng Chen;Zongxin Wang;Tao Luo;Yipei Zhang

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Abstract

As communication technologies advance, millimeter wave (mmWave) signals have been widely used, leading to the rise of massive multiple input multiple output (MIMO) systems. However, the huge resource consumption cost by all-digital beamforming limits its application in MIMO. Thus, the hybrid beamforming technology raise much attention since its efficiency and low cost. This letter proposes an interference suppression method for mmWave MIMO systems based on hybrid beamforming. Unlike existing approaches only considering the improvement of the receiving signal-to-interference-plus-noise ratio (SINR) and without considering the hardware limitation, this study presents a practical anti-interference algorithm by integrating analog and digital beamforming techniques. To ensure that the digital signal remains within the dynamic range of analog-to-digital converter (ADC), this method employs phase shifters of limited precision to reduce analog interference first, and then maximize the anti-interference potential of digital beamforming. Utilizing the minimum variance distortionless response (MVDR) criterion, this study introduces a new covariance matrix reconstruction algorithm at the analog stage, and the sampling matrix inversion algorithm at the digital stage. Simulation results demonstrate the effectiveness of proposed algorithm in anti-interference. This approach improves the practical applicability of hybrid beamforming in practical scenarios.

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毫米波多输入多输出系统中混合波束成形的实用抗干扰算法

随着通信技术的发展，毫米波（mmWave）信号得到了广泛应用，从而导致了大规模多输入多输出（MIMO）系统的兴起。然而，全数字波束成形技术的巨大资源消耗成本限制了它在多输入多输出系统中的应用。因此，混合波束成形技术因其高效、低成本而备受关注。本文提出了一种基于混合波束成形的毫米波 MIMO 系统干扰抑制方法。与现有的只考虑改善接收信号干扰加噪声比（SINR）和不考虑硬件限制的方法不同，本研究通过整合模拟和数字波束成形技术，提出了一种实用的抗干扰算法。为确保数字信号保持在模数转换器（ADC）的动态范围内，该方法采用了精度有限的移相器，首先降低模拟干扰，然后最大限度地发挥数字波束成形的抗干扰潜力。利用最小方差无失真响应（MVDR）准则，本研究在模拟阶段引入了一种新的协方差矩阵重构算法，在数字阶段引入了采样矩阵反演算法。仿真结果证明了所提算法在抗干扰方面的有效性。这种方法提高了混合波束成形在实际应用场景中的实用性。

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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.

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