发表机构
Lawrence Livermore National Laboratory（劳伦斯利弗莫尔国家实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文实验演示了使用全数字无线协调分布式天线阵列进行一维傅里叶域成像，成功分辨两个噪声源至预期位置3°以内，验证了无共享参考的相干成像原理。
AI 中文摘要
在这项工作中，我们展示了使用全数字无线协调相干分布式天线阵列（CDA）接收机进行一维傅里叶域成像的实验演示。节点由两个软件定义无线电（SDR）组成，它们使用独立的系统时钟，在没有共享参考（如全球导航卫星系统（GNSS））的情况下执行无线时间、频率和相位协调。两个空间分离的噪声源发射带宽为25 MHz、载波频率为915 MHz的独立噪声波形。两个源分别位于偏离阵列法线方向$-6.28°$和$12.95°$的角度，并进行了成像。在单个和组合源测量中，两个源都被清晰地分辨到其预期位置的$3°$以内，从而展示了使用全数字协调分布式天线阵列的傅里叶域图像重建原理。
英文摘要
In this work we present an experimental demonstration of one-dimensional Fourier-domain imaging using a fully-digital wirelessly coordinated coherent distributed antenna array (CDA) receiver. The nodes consist of two software-defined radios (SDRs) operating with independent system clocks performing wireless time, frequency, and phase coordination without a shared reference such as the global navigation satellite system (GNSS). Two spatially separated noise sources transmit independent noise waveforms with a bandwidth of 25 MHz and a carrier frequency of 915 MHz. Two sources were positioned at angles of $-6.28°$ and $12.95°$ off broadside and imaging was performed. The two sources are clearly resolved to within $3°$ of their expected locations in both the individual and combined source measurements and demonstrating the Fourier-domain image reconstruction principle using a fully-digitally coordinated distributed antenna array.
