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Creators/Authors contains: "Li, Ruifu"

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  1. ; ; ; (, IEEE)
    Free, publicly-accessible full text available April 17, 2026
  2. ; ; ; ; ; ; ; ; ; ; et al (, Optica Publishing Group)
    We show efficient wide-tunable mm-wave-to-optical transduction (20 to 70 GHz at -9 to -18 dBc) using a triple-microring modulator. Integrated monolithically with a 18% bandwidth LNA, it generates sidebands with <−35 dBm RF input. 
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    Free, publicly-accessible full text available May 8, 2026
  3. ; ; ; ; ; ; ; ; ; ; et al (, Optica Publishing Group)
    We demonstrate a dual-cavity modulator based mm-wave to optical converter on GF45SPCLO platform. An optical energy conversion efficiency at -29.8 dB and a side-band SNR at 30.7 dB are reported. 
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    Free, publicly-accessible full text available May 7, 2026
  4. ; ; ; ; ; ; (, IEEE)
    Millimeter-wave (mmWave) systems require a large number of antennas, which makes the beam training challenging and time-consuming for conventional phased arrays. Recently, a true-time-delay (TTD) array-based beam training algorithm has been shown as an effective solution to overcome the training overhead in large arrays. In this paper, we present a custombuilt over-the-air (OTA) testbed to study the effects of hardware impairments on the TTD-based beam training and verify its feasibility in a real system. We proposed an orthogonal matching pursuit (OMP) based reconstruction algorithm along with a phase calibration dictionary to combat nonidealities such as strong frequency selectivity and phase misalignment in the received raw IQ signal. Post-processing results showed that with the nonideality effects properly handled, the 3D TTD beam training algorithm can achieve high AOA estimation accuracy. 
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    Full Text Available 
  5. ; ; ; (, IEEE)
    Full Text Available 
  6. ; ; (, IEEE Journal on Selected Areas in Communications)
    Full Text Available