论文标题
使用可扩展的高精度定位的开环分布式波束形成
Open-Loop Distributed Beamforming Using Scalable High Accuracy Localization
论文作者
论文摘要
我们提出一个分布式的天线阵列，该天线阵列在1.5 GHz处支持开环分布式波束形成。基于可扩展的高准确性节点范围技术，我们使用三个传输节点展示了开环的实验。为了支持分布式波束形成而没有目的地的反馈，必须以低于$λ/15 $的光束成型载流子频率的精度知道分布式阵列中的节点的相对位置，以确保该阵列在接收位置保持至少90 \％相干波束成形的增益。对于在微波范围内的操作，这会导致范围估计精度的精度或更低。我们提出了一种可扩展的，高准确的波形和新方法，以优化范围测量，以显着提高估计精度。将此波形与三节点阵列一起使用，我们在多个节点之间同时演示了高准确性范围，从中实现了两个次级节点上的相位校正来维持主节点，从而支持开放环分布式波束形成。节点的运动后，范围估计用于动态更新相位校正，并随着节点移动而保持光束形成。我们在1.5 GHz处显示了第一个带有两个节点和三节点阵列的开放环分布式波束形成，这证明了无需来自目的地的反馈而实现和维护基于阶段的波束成形的能力。
We present a distributed antenna array supporting open-loop distributed beamforming at 1.5 GHz. Based on a scalable, high-accuracy internode ranging technique, we demonstrate open-loop beamforming experiments using three transmitting nodes. To support distributed beamforming without feedback from the destination, the relative positions of the nodes in the distributed array must be known with accuracies below $λ/15$ of the beamforming carrier frequency to ensure that the array maintains at least 90\% coherent beamforming gain at the receive location. For operations in the microwave range, this leads to range estimation accuracies of centimeters or lower. We present a scalable, high-accuracy waveform and new approaches to refine range measurements to significantly improve the estimation accuracy. Using this waveform with a three-node array, we demonstrate high-accuracy ranging simultaneously between multiple nodes, from which phase corrections on two secondary nodes are implemented to maintain beamforming with the primary node, thereby supporting open-loop distributed beamforming. Upon movement of the nodes, the range estimation is used to dynamically update the phase correction, maintaining beamforming as the nodes move. We show the first open-loop distributed beamforming at 1.5 GHz with two-node and three-node arrays, demonstrating the ability to implement and maintain phase-based beamforming without feedback from the destination.
