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- W3038996850 abstract "Abstract Real-time tracking of a waveform frequency content is essential for detection and analysis of fast rare events in communications, radar, radio astronomy, spectroscopy, sensing etc. This requires a method that can provide real-time spectrum analysis (RT-SA) of high-speed waveforms in a continuous and gap-free fashion. Digital signal processing is inefficient to perform RT-SA over instantaneous frequency bandwidths above the sub-GHz range and/or to track spectral changes faster than a few microseconds. Analog dispersion-induced frequency-to-time mapping enables RT-SA of short isolated pulse-like signals but cannot be extended to continuous waveforms. Here, we propose a universal analog processing approach for time-mapping a gap-free spectrogram −the prime method for dynamic frequency analysis− of an incoming arbitrary waveform, based on a simple sampling and dispersive delay scheme. In experiments, the spectrograms of GHz-bandwidth microwave signals are captured at a speed of ~5×10 9 Fourier transforms per second, allowing to intercept nanosecond-duration frequency transients in real time. This method opens new opportunities for dynamic frequency analysis and processing of high-speed waveforms." @default.
- W3038996850 created "2020-07-10" @default.
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- W3038996850 date "2020-07-03" @default.
- W3038996850 modified "2023-10-16" @default.
- W3038996850 title "Real-time gap-free dynamic waveform spectral analysis with nanosecond resolutions through analog signal processing" @default.
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- W3038996850 doi "https://doi.org/10.1038/s41467-020-17119-2" @default.
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