K
Kun Xu
Researcher at Beijing University of Posts and Telecommunications
Publications - 656
Citations - 8643
Kun Xu is an academic researcher from Beijing University of Posts and Telecommunications. The author has contributed to research in topics: Computer science & Photonics. The author has an hindex of 42, co-authored 580 publications receiving 6499 citations. Previous affiliations of Kun Xu include IBM & Nanjing Medical University.
Papers
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Stable radio frequency phase delivery by rapid and endless post error cancellation.
TL;DR: This work proposes and demonstrates a phase stabilization method for transfer and downconvert radio frequency (RF) signal from remote antenna to center station via a radio-over-fiber (ROF) link that post-corrects any phase fluctuation by mixing during the downconversion process at the center station.
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Complexity-reduced digital predistortion for subcarrier multiplexed radio over fiber systems transmitting sparse multi-band RF signals.
TL;DR: A novel multi-band digital predistortion (DPD) technique is proposed to linearize the subcarrier multiplexed radio-over-fiber (SCM-RoF) system transmitting sparse multi- band RF signal with large blank spectra between the constituent RF bands, leading to significant improvement of the EVM performances of the signals on both of the two bands.
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Dual-band dechirping LFMCW radar receiver with high image rejection using microwave photonic I/Q mixer.
TL;DR: The proposed photonic-assisted receiver is able to simplify the architecture and improve performance for the multispectral sensing application.
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Bandpass filters based on phase-shifted photonic crystal waveguide gratings
TL;DR: A third-order Chebyshev bandpass filter based on compound phase-shifted PC waveguide gratings suitable for dense wavelength-division-multiplexed (DWDM) optical communication systems with a channel spacing of 100-GHz is proposed.
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Photonic ultrawideband monocycle pulse generation using a single electro-optic modulator.
TL;DR: In this article, a compact approach to photonic-assisted ultrawideband (UWB) monocycle pulse generation is proposed and experimentally demonstrated based on the wavelength dependence of the half-wave voltage of a Mach-Zehnder modulator.