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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Journal ArticleDOI
Hybrid radio-intermediate-frequency oscillator with photonic-delay-matched frequency conversion pair.
TL;DR: A low-phase-noise, single-loop radio-frequency (RF) oscillator is proposed and experimentally demonstrated where part of the oscillation is in intermediate- frequency (IF) domain by a pair of frequency conversions by a matched photonic delay between the two conversions.
Posted Content
Scalable Global Alignment Graph Kernel Using Random Features: From Node Embedding to Graph Embedding
Lingfei Wu,Ian En-Hsu Yen,Zhen Zhang,Kun Xu,Liang Zhao,Xi Peng,Yinglong Xia,Charu C. Aggarwal +7 more
TL;DR: In this article, the authors proposed a new family of global alignment graph kernels, which take into account the global properties of graphs by using geometric node embeddings and an associated node transportation based on earth mover's distance.
Proceedings ArticleDOI
Decoding Staircase Codes with Marked Bits
TL;DR: In this paper, a novel decoding algorithm is proposed, which partially uses soft information from the channel, which is based on marking certain number of highly reliable and highly unreliable bits to improve the miscorrectiondetection capability of the SCC decoder and the error-correcting capability of BDD.
Journal ArticleDOI
Nonlinear Distortions Compensation Based on Artificial Neural Networks in Wideband and Multi-Carrier Systems
TL;DR: This paper proposes to adopt an artificial neural network (ANN) as the processing approach which could mitigate IMD3 and XMD simultaneously and shows better performance and generalization ability.
Journal ArticleDOI
UWB Impulse Radio Transmitter Using an Electrooptic Phase Modulator Together With a Delay Interferometer
Fangzheng Zhang,Songnian Fu,Jian Wu,Nam Quoc Ngo,Kun Xu,Yan Li,Xiaobin Hong,Ping Shum,Jintong Lin +8 more
TL;DR: In this paper, a simple ultra-wideband (UWB) impulse radio transmitter is demonstrated using an electrooptic phase modulator (PM) and a delay interferometer (DI), where a pair of optical Gaussian pulses with opposite polarities are generated at the two output ports of the DI.