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Compressive sensing (CS) is a novel technology to realize sub-Nyquist sampling for measuring of sparse signals. Due to the advantages of high bandwidth offered by photonics, realization of compressive sensing in a photonic link is of great interest. In this paper, we discussed the limitations of CS in a conventional photonic link A potential solution is proposed. To further reduce sampling rate, we...
In this paper, a microwave spectrum sensing system based on photonic time stretch with large stretch factor beyond 80 is designed and experimentally demonstrated. A 10 GHz input signal is turned into a 122 MHz signal after stretching and the signal spectrum is successfully reconstructed by a DSP. The mean square error for spectrum sensing of X-band microwave signal in the experiment is measured to...
A novel technique for instantaneous microwave frequency measurement using an optical phase modulator is proposed and demonstrated. In the proposed system, a microwave signal with its frequency to be measured is modulated on two optical wavelengths at the phase modulator, with the phase-modulated optical signals sent to a dispersive element, and detected at two photo-detectors. Due to the chromatic...
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