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arXiv 2002.02524eess.SPcs.SYeess.SY
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相干分布式天线阵的高精度多节点测距

High-Accuracy Multi-Node Ranging For Coherent Distributed Antenna Arrays

Sean Ellison, Jeffrey Nanzer

摘要:

介绍了相干分布式天线阵列中高精度节点间测距波形的设计和实验实现。基于频谱稀疏的高精度测距波形,所提出的多频波形能够在阵列中的多个节点之间同时进行高精度测距,而不受干扰。该波形是基于一个独特的时间-频率波形的方法,结合了步进频率波形与不同的步骤周期,每个节点对。波形还固有地包括有益的消歧属性。推导了波形的模糊函数,并得到了测距精度的理论界。测量是在三元件分布式阵列中的软件定义的基于无线电的节点中进行的,展示了两个从节点和一个主节点之间的高精度无模糊测距。

英文摘要:

The design and experimental implementation of a waveform for high-accuracy inter-node ranging in a coherent distributed antenna array is presented. Based on a spectrally-sparse high-accuracy ranging waveform, the presented multi-frequency waveform enables high-accuracy ranging between multiple nodes in an array simultaneously, without interference. The waveform is based on a unique time-frequency duplexing approach combining a stepped-frequency waveform with different step cycles per node pair. The waveform also inherently includes beneficial disambiguation properties. The ambiguity function of the waveform is derived, and theoretical bounds on the ranging accuracy are obtained. Measurements were conducted in software-defined radio-based nodes in a three-element distributed array, demonstrating high-accuracy unambiguous ranging between two slave nodes and one master node.

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