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Youjiang Liu
Researcher at China Academy of Engineering Physics
Publications - 61
Citations - 799
Youjiang Liu is an academic researcher from China Academy of Engineering Physics. The author has contributed to research in topics: Amplifier & Predistortion. The author has an hindex of 13, co-authored 51 publications receiving 633 citations. Previous affiliations of Youjiang Liu include Academy of Engineering & Tsinghua University.
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Journal ArticleDOI
Digital Predistortion for Concurrent Dual-Band Transmitters Using 2-D Modified Memory Polynomials
TL;DR: This paper proposes a novel two-dimensional modified memory polynomial (2D-MMP) technique to compensate for nonlinear distortion in the concurrent dual-band transmitters to achieve nearly the same linearization accuracy compared to the prior 2D-DPD model.
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A Concurrent Dual-Band Uneven Doherty Power Amplifier with Frequency-Dependent Input Power Division
TL;DR: A concurrent dual-band uneven GaN Doherty power amplifier for two wide-spacing frequencies application is proposed in this paper and an adaptive power division is realized by a frequency-dependent uneven power divider as well as the input matching nonlinearities of the two cells in Doherty PA.
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A Robust Augmented Complexity-Reduced Generalized Memory Polynomial for Wideband RF Power Amplifiers
TL;DR: A robust model for the accurate behavioral modeling and digital predistortion (DPD) of wideband radio-frequency power amplifiers (PAs) using a complexity-reduced generalized memory polynomial (GMP) connected with a nonlinear memory effect (NME) subblock in parallel is proposed.
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Novel Technique for Wideband Digital Predistortion of Power Amplifiers With an Under-Sampling ADC
TL;DR: This paper proposes a novel technique, termed under-sampling restoration digital predistortion (USR-DPD), to linearize wideband power amplifiers (PAs) with ADCs that operate at sampling rates much lower than required by Nyquist limits for the predistorted band (under-sampled ADCs).
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All-Digital Blind Background Calibration Technique for Any Channel Time-Interleaved ADC
TL;DR: The proposed digital adaptive blind background calibration technique for the gain, timing skew, and offset mismatch errors in a time-interleaved analog-to-digital converter (TI-ADC) is applicable to any TI-ADCs with no limitations to the channel number, sub- ADC sampling rate, signal type, and so on.