发表机构
Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University（上海多维信息处理重点实验室，华东师范大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
提出基于光学频率梳的两步微波频率测量与时频分析方法，结合受激布里渊散射频率-时间映射和双光梳下变频，实现0-40 GHz范围内误差小于10 kHz的高精度测量，并成功分析复杂信号。
AI 中文摘要
宽带微波频率测量与时频分析对于电子战等应用至关重要。然而，在超宽带信号分析中，传统电子方法虽具有较高的分析精度，但其固有的电子瓶颈限制了实时分析能力。本文提出并实验验证了一种基于光学频率梳的两步微波频率测量与时频分析方法。该系统首先利用受激布里渊散射辅助的频率-时间映射（FTTM）和双光梳信道化接收，在0-40 GHz范围内进行粗频率定位。随后，重新应用双光梳对被测信号进行下变频，并通过数字信号处理实现高精度无模糊的频率提取。实验结果表明，该系统在0-40 GHz范围内实现平均单音频率测量误差小于10 kHz。我们进一步实验测量了多音、线性调频和V形调频信号，证明了该方法分析复杂信号的能力。
英文摘要
Broadband microwave frequency measurement and time-frequency analysis are crucial for applications such as electronic warfare. However, when it comes to ultra wideband signal analysis, traditional electronic methods have high analysis accuracy, but intrinsic electronic bottlenecks limit their real-time analysis. Here, we propose and experimentally demonstrate a two-step microwave frequency measurement and time-frequency analysis method based on optical frequency combs. The system first performs coarse frequency localization over the 0-40 GHz range using stimulated-Brillouin-scattering-assisted frequency-to-time mapping (FTTM) and dual-comb channelized reception. The dual-comb is then reapplied for downconverting the signal under test, followed by digital signal processing to achieve high-accuracy unambiguous frequency extraction. Experimental results show that the system achieves mean single-tone frequency measurement errors of less than 10 kHz over 0-40 GHz. We further experimentally measure multi-tone, linearly frequency-modulated, and V-shaped frequency-modulated signals, demonstrating the proposed method's capability for analyzing complex signals.
Comments10 pages, 5 figures
