dr. Gao

1. A 4×Two-Way mm-Wave Doherty CMOS PA
   Kumaran, Anil Kumar; Wu, Yizhuo; Pashaeifar, Masoud; Nachouane, Hamza; Gao, Chang; Cornelis Nicolaas de Vreede, Leonardus; Alavi, Morteza S.;
   IEEE Transactions on Microwave Theory and Techniques,
   Volume 73, Issue 10, pp. 7482-7499, 2025. DOI: 10.1109/TMTT.2025.3569155
   
   Keywords: ...

   Impedance;Power combiners;Power amplifiers;Power generation;Bandwidth;Peak to average power ratio;Inductors;5G mobile communication;Capacitors;CMOS technology;Adaptive biasing;artificial intelligence (AI);compact;digital predistortion (DPD);Doherty;lumped components;millimeter-wave (mm-wave);power amplifier (PA);power combiner;three-stage;voltage standing wave ratio (VSWR).

2. DeltaDPD: Exploiting Dynamic Temporal Sparsity in Recurrent Neural Networks for Energy-Efficient Wideband Digital Predistortion
   Wu, Yizhuo; Zhu, Yi; Qian, Kun; Chen, Qinyu; Zhu, Anding; Gajadharsing, John; de Vreede, Leo C. N.; Gao, Chang;
   IEEE Microwave and Wireless Technology Letters,
   Volume 35, Issue 6, pp. 772-775, 2025. DOI: 10.1109/LMWT.2025.3565004
   
   Keywords: ...

   Vectors;Recurrent neural networks;Wideband;Radio frequency;Predistortion;Artificial neural networks;Logic gates;Computational modeling;Arithmetic;Wireless communication;Digital predistortion (DPD);digital signal processing (DSP);power amplifier (PA);recurrent neural network (RNN);temporal sparsity.

3. TCN-DPD: Parameter-Efficient Temporal Convolutional Networks for Wideband Digital Predistortion
   Duan, Huanqiang; Versluis, Manno; Chen, Qinyu; de Vreede, Leo C. N.; Gao, Chang;
   In 2025 IEEE/MTT-S International Microwave Symposium - IMS 2025,
   pp. 1103-1106, 2025. DOI: 10.1109/IMS40360.2025.11103923
   
   Keywords: ...

   Radio frequency;Measurement;Predistortion;Hardware;Microwave amplifiers;Convolutional neural networks;Wideband;temporal convolutional networks;power amplifiers;digital predistortion;behavioral modeling;dilated convolution.

4. DPD-NeuralEngine: A 22-nm 6.6-TOPS/W/mm2 Recurrent Neural Network Accelerator for Wideband Power Amplifier Digital Pre-Distortion
   Li, Ang; Wu, Haolin; Wu, Yizhuo; Chen, Qinyu; de Vreede, Leo C. N.; Gao, Chang;
   In 2025 IEEE International Symposium on Circuits and Systems (ISCAS),
   pp. 1-5, 2025. DOI: 10.1109/ISCAS56072.2025.11043563
   
   Keywords: ...

   Wireless communication;Power measurement;Measurement uncertainty;Power amplifiers;Artificial neural networks;Throughput;Hardware;Vectors;Software;Wideband;Deep Neural Network;Digital Pre-distortion;Software-Hardware Co-Design;ASIC;FPGA.

5. MP-DPD: Low-Complexity Mixed-Precision Neural Networks for Energy-Efficient Digital Predistortion of Wideband Power Amplifiers
   Wu, Yizhuo; Li, Ang; Beikmirza, Mohammadreza; Singh, Gagan Deep; Chen, Qinyu; de Vreede, Leo C. N.; Alavi, Morteza; Gao, Chang;
   IEEE Microwave and Wireless Technology Letters,
   Volume 34, Issue 6, pp. 817-820, 2024. DOI: 10.1109/LMWT.2024.3386330
   
   Keywords: ...

   Power demand;Quantization (signal);Neural networks;Logic gates;Energy efficiency;Wideband;Data models;Digital systems;Deep neural network (DNN);digital predistortion (DPD);digital transmitter (DTX);power amplifier (PA);quantization.

6. OpenDPD: An Open-Source End-to-End Learning & Benchmarking Framework for Wideband Power Amplifier Modeling and Digital Pre-Distortion
   Wu, Yizhuo; Singh, Gagan Deep; Beikmirza, Mohammadreza; de Vreede, Leo C. N.; Alavi, Morteza; Gao, Chang;
   In 2024 IEEE International Symposium on Circuits and Systems (ISCAS),
   pp. 1-5, 2024. DOI: 10.1109/ISCAS58744.2024.10558162
   
   Keywords: ...

   Codes;Transmitters;OFDM;Power amplifiers;Artificial neural networks;Documentation;Benchmark testing;digital pre-distortion;behavioral modeling;deep neural network;power amplifier;digital transmitter.

7. A Low-Spur Fractional-N PLL Based on a Time-Mode Arithmetic Unit
   Gao, Zhong; He, Jingchu; Fritz, Martin; Gong, Jiang; Shen, Yiyu; Zong, Zhirui; Chen, Peng; Spalink, Gerd; Eitel, Ben; Alavi, Morteza S.; Staszewski, Robert Bogdan; Babaie, Masoud;
   IEEE Journal of Solid-State Circuits,
   pp. 1-20, 2022. DOI: 10.1109/JSSC.2022.3209338

8. A 2.6-to-4.1GHz Fractional-N Digital PLL Based on a Time-Mode Arithmetic Unit Achieving -249.4dB FoM and -59dBc Fractional Spurs
   Gao, Zhong; He, Jingchu; Fritz, Martin; Gong, Jiang; Shen, Yiyu; Zong, Zhirui; Chen, Peng; Spalink, Gerd; Eitel, Ben; Yamamoto, Ken; Staszewski, Robert Bogdan; Alavi, Morteza S.; Babaie, Masoud;
   In 2022 IEEE International Solid- State Circuits Conference (ISSCC),
   pp. 380-382, 2022. DOI: 10.1109/ISSCC42614.2022.9731561

9. A DPLL-Based Phase Modulator Achieving -46dB EVM with A Fast Two-Step DCO Nonlinearity Calibration and Non-Uniform Clock Compensation
   Gao, Zhong; Fritz, Martin; He, Jingchu; Spalink, Gerd; Staszewski, Robert Bogdan; Alavi, Morteza S.; Babaie, Masoud;
   In 2022 IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits,
   pp. 14-15, 2022. DOI: 10.1109/VLSITechnologyandCir46769.2022.9830398

10. Recurrent Neural Network Control of a Hybrid Dynamic Transfemoral Prosthesis with EdgeDRNN Accelerator
    C*. Gao; R*. Gehlhar; A. D Ames; S.-C. Liu; T. Delbruck;
    In 2020 IEEE International Conference on Robotics and Automation (ICRA),
    2020. DOI: 10.1109/ICRA40945.2020.9196984

11. A digital to time converter with fully digital calibration scheme for ultra-low power ADPLL in 40 nm CMOS
    B. Wang; Y. H. Liu; P. Harpe; J. van den Heuvel; B. Liu; H. Gao; R. B. Staszewski;
    In 2015 IEEE International Symposium on Circuits and Systems (ISCAS),
    pp. 2289-2292, May 2015.

12. BiCMOS integrated waveguide power combiner at submillimeter-wave frequencies
    Alonso-delPino, M.; Cavallo, D.; Thippur-Shivamurthy, H.; Gao, H.; Spirito, M.;
    In 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz),
    pp. 1-2, 2015. DOI: 10.1109/IRMMW-THz.2015.7327937
    
    Keywords: ...

    Metals;Power combiners;BiCMOS integrated circuits;Permittivity;Dielectrics;Silicon germanium;Pins.

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