Design of Millimeter-Wave Single-Shot Beam Training for True-Time-Delay Array
Design of Millimeter-Wave Single-Shot Beam Training for True-Time-Delay Array
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DOI：
10.1109/spawc48557.2020.9154233
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发表时间：
2020-02
期刊：
影响因子：
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通讯作者：
Veljko Boljanovic;Han Yan;Erfan Ghaderi;D. Heo;Subhanshu Gupta;D. Cabric
中科院分区：
文献类型：
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作者：
Veljko Boljanovic;Han Yan;Erfan Ghaderi;D. Heo;Subhanshu Gupta;D. Cabric
波束训练是毫米波和次太赫兹通信中最重要和最具挑战性的任务之一。当使用窄波束的大型天线阵列时，需要新颖的收发器架构和信号处理技术来避免令人望而却步的训练开销。在这项工作中，我们利用宽范围实时延迟（TTD）模拟阵列和频率相关探测波束的最新发展来加速波束训练。提出了一种用单个训练符号实现高精度到达角估计的算法。此外，研究了TTD前端损伤对波束训练精度的影响，包括增益、相位和延迟误差的影响。最后，研究了模拟延迟抽头的分辨率和范围的缺陷和要求规格，为节能TTD阵列的设计提供了见解，该阵列采用了基于离散时间采样的TTD元件的新架构。
Beam training is one of the most important and challenging tasks in millimeter-wave and sub-terahertz communications. Novel transceiver architectures and signal processing techniques are required to avoid prohibitive training overhead when large antenna arrays with narrow beams are used. In this work, we leverage recent developments in wide range true-time- delay (TTD) analog arrays and frequency dependent probing beams to accelerate beam training. We propose an algorithm that achieves high-accuracy angle of arrival estimation with a single training symbol. Further, the impact of TTD front- end impairments on beam training accuracy is investigated, including the impact of gain, phase, and delay errors. Lastly, the study on impairments and required specifications of resolution and range of analog delay taps are used to provide a design insight of energy efficient TTD array, which employs a novel architecture with discrete-time sampling based TTD elements.