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Real-time gap-free dynamic waveform spectral analysis with nanosecond resolutions through analog signal processing
Saikrishna Reddy Konatham1, Reza Maram1,2, Luis Romero Cortés1
1Institut National de la Recherche Scientifique-Énergie, Matériaux et Télécommunications (INRS-EMT), 800 de la Gauchetière Ouest, Suite 6900, H5A 1K6, Montréal, Québec, Canada.
Nature Communications
|July 5, 2020
Summary
This study introduces a novel analog processing method for real-time spectrum analysis (RT-SA) of high-speed waveforms. The technique enables continuous, gap-free spectrogram capture, ideal for analyzing fast, rare events.
Area of Science:
- Electrical Engineering
- Signal Processing
- Physics
Background:
- Real-time spectrum analysis (RT-SA) is crucial for detecting fast, rare events in various fields.
- Current digital signal processing methods struggle with high-speed waveforms and rapid spectral changes.
- Existing analog methods are limited to specific signal types and cannot handle continuous waveforms.
Purpose of the Study:
- To develop a universal analog processing approach for continuous, gap-free spectrogram analysis of arbitrary high-speed waveforms.
- To overcome the limitations of digital and existing analog methods for real-time spectrum analysis.
Main Methods:
- A novel analog processing technique based on sampling and a dispersive delay scheme.
- Time-mapping of a gap-free spectrogram for dynamic frequency analysis.
- Experimental validation using GHz-bandwidth microwave signals.
Main Results:
- Achieved spectrogram capture at approximately 5x10^9 Fourier transforms per second.
- Successfully intercepted nanosecond-duration frequency transients in real time.
- Demonstrated the capability to analyze arbitrary, continuous high-speed waveforms.
Conclusions:
- The proposed analog processing method offers a universal solution for real-time spectrum analysis of high-speed waveforms.
- This advancement enables new opportunities in dynamic frequency analysis and processing.
- The technique is suitable for applications requiring the detection of fast spectral changes.
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