High-Resolution Angle Tracking for Mobile Wideband Millimeter-Wave Systems With Antenna Array Calibration
High-Resolution Angle Tracking for Mobile Wideband Millimeter-Wave Systems With Antenna Array Calibration
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DOI：
10.1109/twc.2018.2865759
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发表时间：
2018-11-01
影响因子：
10.4
通讯作者：
Heath, Robert W., Jr.
中科院分区：
文献类型：
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作者：
Zhu, Dalin;Choi, Junil;Heath, Robert W., Jr.
毫米波（mmWave）系统采用定向波束来支持高速率数据通信。发射波束与接收波束之间的微小失准（例如，因移动性导致）可能会使接收信号质量显著下降，在视距通信信道中尤其如此。本文中，我们针对具有移动性的宽带毫米波系统提出并评估了高分辨率角度跟踪策略。我们专门设计了成对的辅助波束作为跟踪波束，并利用它们捕捉角度变化，进而据此调整数据波束的指向。与传统的波束跟踪设计不同，所提框架既不依赖角度变化模型，也无需基于网格假设。为了实际应用所提方法，我们研究了阵列校准误差对辅助波束对设计的影响。数值结果表明，采用所提方法，在各种天线阵列配置、信道模型和移动性条件下，均可实现良好的角度跟踪性能。
Millimeter-wave (mmWave) systems use directional beams to support high-rate data communications. Small misalignment between the transmit and receive beams (e.g., due to the mobility) can result in a significant drop of the received signal quality, especially in line-of-sight communication channels. In this paper, we propose and evaluate high-resolution angle tracking strategies for wideband mmWave systems with mobility. We custom design pairs of auxiliary beams as the tracking beams, and use them to capture the angle variations, toward which the steering directions of the data beams are adjusted. Different from conventional beam tracking designs, the proposed framework neither depends on the angle variation model nor requires an on-grid assumption. For practical implementation of the proposed methods, we examine the impact of the array calibration errors on the auxiliary beam pair design. Numerical results reveal that by employing the proposed methods, good angle tracking performance can be achieved under various antenna array configurations, channel models, and mobility conditions.