获得时序同步的基本边界

P. Bidigare, Upamanyu Madhow, R. Mudumbai, D. Scherber
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引用次数: 30

摘要

在本文中,我们提出了一种时序同步算法,该算法达到了Weiss和Weinstein导出的基本边界。这些边界表明,除了随着时间带宽乘积和信噪比(SNR)的提高,如果SNR高于阈值,时序精度也会随着载波频率的增大而提高。我们的算法本质上遵循Weiss-Weinstein界的逻辑,并有以下几个阶段:使用时域样本进行粗估计,在频域使用牛顿算法进行细粒度估计,最后细化到载波周期的一小部分。虽然这里的结果是基本的兴趣,但我们有动力推动同步的限制,以实现使用协作节点集合模拟虚拟天线阵列所需的紧密协调。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Attaining fundamental bounds on timing synchronization
In this paper, we propose an algorithm for timing synchronization that attains fundamental bounds derived by Weiss and Weinstein. These bounds state that, in addition to improving with time-bandwidth product and signal-to-noise ratio (SNR), timing accuracy also improves as the carrier frequency gets larger, if the SNR is above a threshold. Our algorithm essentially follows the logic of the Weiss-Weinstein bound, and has the following stages: coarse estimation using time domain samples, fine-grained estimation using a Newton algorithm in the frequency domain, and final refinement to within a small fraction of a carrier cycle. While the results here are of fundamental interest, we are motivated to push the limits of synchronization to enable the tight coordination required for emulating virtual antenna arrays using a collection of cooperating nodes.
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