论文标题
毫米波的设计单光束训练
Design of Millimeter-Wave Single-Shot Beam Training for True-Time-Delay Array
论文作者
论文摘要
光束训练是毫米波和亚terahertz通信中最重要，最具挑战性的任务之一。当使用带有狭窄光束的大天线阵列时，需要新颖的接收器体系结构和信号处理技术，以避免过度的训练开销。在这项工作中，我们利用了广泛的True-time-delay（TTD）模拟阵列和频率依赖探测器的最新发展来加速光束训练。我们提出了一种具有单个训练符号的算法，该算法可实现高临界性的到达估计。此外，研究了TTD前端损伤对光束训练精度的影响，包括增益，相位和延迟错误的影响。最后，使用有关分辨率和模拟延迟水龙头范围的障碍和所需规范的研究，用于提供节能TTD阵列的设计见解，该阵列采用了具有基于离散时间抽样的TTD元素的新型体系结构。
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.
