MERL - Mitsubishi Electric Research Laboratories

Rui Ma

Rui Ma
Rui's Quick Links

  • Biography

    Prior to joining MERL in 2012, Rui was a Senior Power Amplifier Research Engineer at Nokia Siemens Networks. His research interests include RF Power Device Modeling, Power Amplifier / Radio Front-End Architectures, non-linear microwave circuit design, and high frequency measurement techniques. He is an Associate Editor of IEEE Transactions on Microwave Theory and Techniques, and Associate Editor of IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology.

  • Recent News & Events


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  • Awards

    •  AWARD    Former Intern Receives IBM Scientific Award Honorable Mention
      Date: January 16, 2019
      Awarded to: Daniel Dinis
      MERL Contact: Rui Ma
      Research Areas: Communications, Signal Processing
      Brief
      • Former MERL intern Daniel Dinis from University of Aveiro (UA), Portugal has received the 2018 IBM Scientific Award with Honorable Mention referring to the contributions on "Real-time Tunable Delta-sigma modulators for All-Digital RF Transmitters" in his Ph.D. study.

        The award-winning work includes research conducted under the supervision of Arnaldo Oliveira and José Neto Vieira, professors from the Department of Electronics and Information Technology (DETI) of the UA, as well as contributions made during Daniel's 7 month internship in 2017 at MERL.

        The ceremony for the presentation of the 28th IBM Scientific Prize took on January 16th, at the Noble Hall of the Superior Technical Institute. It was chaired by Marcelo Rebelo de Sousa, President of the Portuguese Republic.
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  • Internships with Rui

    • MD1648: THz Electronic Sensing

      MERL is looking for a senior Ph.D. student to join our team to conduct application-motivated research and experiments. The candidate must have hands-on practical lab experiment experience on millimeter-wave, sub-THz, or THz for sensing, radar, and other applications. Skills of using RF/Microwave Lab equipment are necessary. Knowledge of solid-state device physics, high frequency, and high speed integrated circuit (IC) chip design, and signal processing is desired. The internship is expected to be 3-6 months, starting date is flexible after September.

    • MD1696: Advanced RF Technologies

      Mitsubishi Electric Research Laboratories (Cambridge, MA) is seeking a highly motivated, qualified individual to join our 3 month internship program of research on advanced RF technologies. The ideal candidate should be a senior Ph.D. student with good experience in microwave power amplifier/RF active circuit design and experiment, RF front end systems. Familiarity with ADS and Matlab is required. Knowledge of radio system architecture and FPGA (signal processing) would be an asset.

    • MD1757: ML based Digital Pre-distortion (DPD) for PA

      MERL is looking for a talented intern to work on the next generation Digital-predistortion algorithms for power amplifier linearization such as 5G. The development of a DPD system involves aspects of signal processing and statistical algorithm design, RF components and instrumentation, digital hardware and software. It is therefore both a challenging and intellectually rewarding experience. This will involve MATLAB coding, interfacing to test equipment such as power sources, signal generators and analyzers and construction and calibration of RF component assemblies. The ideal candidate should have knowledge and experience in adaptive signal processing, machine learning, and radio communication. Good practical laboratory skills are needed. RF semiconductor devices and circuit knowledge is a plus. Duration is 3 to 6 months.

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  • MERL Publications

    •  Cao, W., Benosman, M., Zhang, X., Ma, R., "Domain Knowledge-Based Automated Analog Circuit Design with Deep Reinforcement Learning", AAAI Conference on Artificial Intelligence, February 2022.
      BibTeX TR2022-017 PDF
      • @inproceedings{Cao2022feb,
      • author = {Cao, Weidong and Benosman, Mouhacine and Zhang, Xuan and Ma, Rui},
      • title = {Domain Knowledge-Based Automated Analog Circuit Design with Deep Reinforcement Learning},
      • booktitle = {AAAI Conference on Artificial Intelligence},
      • year = 2022,
      • month = feb,
      • url = {https://www.merl.com/publications/TR2022-017}
      • }
    •  Kantana, C., Ma, R., Benosman, M., Komatsuzaki, Y., Yamanaka, K., "A Hybrid Heuristic Search Control Assisted Optimization of Dual-Input Doherty Power Amplifier", European Microwave Conference 2021, February 2022.
      BibTeX TR2022-012 PDF
      • @inproceedings{Kantana2022feb,
      • author = {Kantana, Chouaib and Ma, Rui and Benosman, Mouhacine and Komatsuzaki, Yuji and Yamanaka, Koji},
      • title = {A Hybrid Heuristic Search Control Assisted Optimization of Dual-Input Doherty Power Amplifier},
      • booktitle = {European Microwave Conference 2021},
      • year = 2022,
      • month = feb,
      • url = {https://www.merl.com/publications/TR2022-012}
      • }
    •  De Silva, U., Ma, R., Koike-Akino, T., Yamashita, A., Nakamizo, H., "A Modular 1D-CNN Architecture for Real-time Digital Pre-distortion", IEEE Radio and Wireless Symposium (RWS) 2022, January 2022.
      BibTeX TR2022-007 PDF
      • @inproceedings{DeSilva2022jan,
      • author = {De Silva, Udara and Ma, Rui and Koike-Akino, Toshiaki and Yamashita, Ao and Nakamizo, Hideyuki},
      • title = {A Modular 1D-CNN Architecture for Real-time Digital Pre-distortion},
      • booktitle = {IEEE Radio and Wireless Symposium (RWS) 2022},
      • year = 2022,
      • month = jan,
      • issn = {2473-4640},
      • isbn = {978-1-6654-3472-0},
      • url = {https://www.merl.com/publications/TR2022-007}
      • }
    •  Teo, K.H., Zhang, Y., Chowdhury, N., Rakheja, S., Ma, R., Xie, Q., Yagyu, E., Yamanaka, K., Li, K., Palacios, T., "Emerging GaN technologies for power, RF, digital and quantum computing applications: recent advances and prospects", Journal of Applied Physics, DOI: 10.1063/​5.0061555, December 2021.
      BibTeX TR2022-002 PDF
      • @article{Teo2021dec,
      • author = {Teo, Koon Hoo and Zhang, Yuhao and Chowdhury, Nadim and Rakheja, Shaloo and Ma, Rui and Xie, Qingyun and Yagyu, Eiji and Yamanaka, Koji and Li, Kexin and Palacios, Tomas},
      • title = {Emerging GaN technologies for power, RF, digital and quantum computing applications: recent advances and prospects},
      • journal = {Journal of Applied Physics},
      • year = 2021,
      • month = dec,
      • doi = {10.1063/5.0061555},
      • url = {https://www.merl.com/publications/TR2022-002}
      • }
    •  Furuichi, T., Ma, R., Koike-Akino, T., Komatsuszaki, Y., "Full-Range Three-Stage 16GSa/s Riemann Pump RF-Power DAC in GaN HEMT", Asia-Pacific Microwave Conference (APMC) 2021, DOI: 1109/​APMC52720.2021.9661641, November 2021.
      BibTeX TR2021-141 PDF
      • @inproceedings{Furuichi2021nov,
      • author = {Furuichi, Tomoyuki and Ma, Rui and Koike-Akino, Toshiaki and Komatsuszaki, Yuji},
      • title = {Full-Range Three-Stage 16GSa/s Riemann Pump RF-Power DAC in GaN HEMT},
      • booktitle = {Asia-Pacific Microwave Conference (APMC) 2021},
      • year = 2021,
      • month = nov,
      • doi = {1109/APMC52720.2021.9661641},
      • isbn = {978-1-6654-3782-0},
      • url = {https://www.merl.com/publications/TR2021-141}
      • }
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  • Videos

  • MERL Issued Patents

    • Title: "Power Amplifier System and Transfer Learning-based Autotuning Optimization Method Thereof"
      Inventors: Ma, Rui; Benosman, Mouhacine; Jeong, Soyeon
      Patent No.: 11,336,231
      Issue Date: May 17, 2022
    • Title: "All-digital Transmitter with Wideband Beamformer"
      Inventors: Ma, Rui; Pulipati, Sravan Kumar
      Patent No.: 11,121,680
      Issue Date: Sep 14, 2021
    • Title: "Methods and Systems for Terahertz-Based Positioning"
      Inventors: Wang, Pu; Fu, Haoyu; Orlik, Philip V.; Koike-Akino, Toshiaki; Ma, Rui; Wang, Bingnan
      Patent No.: 10,795,151
      Issue Date: Oct 6, 2020
    • Title: "Mixed-mode Millimeter-wave Transmitter"
      Inventors: Ma, Rui; Da Cos, Daniel Antonio; Nagai, Yukimasa
      Patent No.: 10,560,126
      Issue Date: Feb 11, 2020
    • Title: "System and Method for Generating High Speed Digitized-RF Signals"
      Inventors: Ma, Rui; Da Cos, Daniel Antonio; Nagai, Yukimasa
      Patent No.: 10,523,478
      Issue Date: Dec 31, 2019
    • Title: "High Speed Digital Bit Generator for Optical Frontal Interface"
      Inventors: Ma, Rui; Da Cos, Daniel Antonio; Nagai, Yukimasa
      Patent No.: 10,516,420
      Issue Date: Dec 24, 2019
    • Title: "Power Amplifier System and Learning-based Autotuning Method Thereof"
      Inventors: Ma, Rui; Benosman, Mouhacine; Manjunatha, Koushik; Niu, Sufeng; Da Cos, Daniel Antonio
      Patent No.: 10,454,427
      Issue Date: Oct 22, 2019
    • Title: "Digital Beamforming Transmitter Array System with Hardware Sharing and Reduction"
      Inventors: Wang, Bingnan; Peng, Zhengyu; Kim, Kyeong-Jin; Wang, Pu; Ma, Rui; Teo, Koon Hoo
      Patent No.: 10,270,510
      Issue Date: Apr 23, 2019
    • Title: "Multi-band radio frequency transmitter"
      Inventors: Ma, Rui; Da Cos, Daniel Antonio; Teo, Koon Hoo; Orlik, Philip V.
      Patent No.: 10,187,232
      Issue Date: Jan 22, 2019
    • Title: "Noise Mitigating Quantizer for Reducing Nonlinear Distortion in Digital Signal Transmission"
      Inventors: Ma, Rui; Tanovic, Omer
      Patent No.: 10,177,776
      Issue Date: Jan 8, 2019
    • Title: "Methods and System of a Digital Transmitter with Reduced Quantization Noise"
      Inventors: Ma, Rui; Da Cos, Daniel Antonio
      Patent No.: 10,128,875
      Issue Date: Nov 13, 2018
    • Title: "Inter-Band CA Digital Transmitter with Multi-Stage Out-of-Band Noise Canceller"
      Inventors: Ma, Rui; Chung, SungWon; Teo, Koon Hoo
      Patent No.: 9,985,667
      Issue Date: May 29, 2018
    • Title: "Impedance Flattening Network for High Efficiency Wideband Doherty Power Amplifier"
      Inventors: Ma, Rui; Ali, Sheikh Nijam; Teo, Koon Hoo
      Patent No.: 9,948,246
      Issue Date: Apr 17, 2018
    • Title: "Wideband Self-Envelope Tracking RF Power Amplifier"
      Inventors: Ma, Rui; Teo, Koon Hoo; Chung, SungWon
      Patent No.: 9,780,730
      Issue Date: Oct 3, 2017
    • Title: "System and Method for Linearizing Power Amplifiers"
      Inventors: Koike-Akino, Toshiaki; Zhu, Qiuyao; Ma, Rui; Teo, Koon Hoo
      Patent No.: 9,749,163
      Issue Date: Aug 29, 2017
    • Title: "Method to Generate Multilevel Inverter Modulation Control Signals"
      Inventors: Duan, Chunjie; Teo, Koon Hoo; Ma, Rui
      Patent No.: 9,559,610
      Issue Date: Jan 31, 2017
    • Title: "Three-Way Sequential Power Amplifier System for Wideband RF Signal"
      Inventors: Ma, Rui; Shao, Jin; Teo, Koon Hoo
      Patent No.: 9,503,028
      Issue Date: Nov 22, 2016
    • Title: "System and Method for Generating Multi-Band Signal"
      Inventors: Ma, Rui; Chung, SungWon; Teo, Koon Hoo
      Patent No.: 9,294,079
      Issue Date: Mar 22, 2016
    • Title: "System and Method for Linearizing Power Amplifiers"
      Inventors: Koike-Akino, Toshiaki; Zhu, Qiuyao; Ma, Rui; Teo, Koon Hoo
      Patent No.: 9,270,504
      Issue Date: Feb 23, 2016
    • Title: "Output Matching Network for Wideband Power Amplifier with Harmonic Suppression"
      Inventors: Ma, Rui; Chung, SungWon; Teo, Koon Hoo
      Patent No.: 9,231,550
      Issue Date: Jan 5, 2016
    • Title: "Digital Power Encoder for Direct Digital-RF Transmitter"
      Inventors: Ma, Rui; Zhu, Qiuyao; Teo, Koon Hoo; Duan, Chunjie
      Patent No.: 9,100,265
      Issue Date: Aug 4, 2015
    • Title: "System and Method for Linearizing Power Amplifiers"
      Inventors: Ma, Rui; Zhu, Qiuyao; Teo, Koon Hoo; Duan, Chunjie
      Patent No.: 9,054,940
      Issue Date: Jun 9, 2015
    • Title: "Reconfigurable Output Matching Network for Multiple Power Mode Power Amplifiers"
      Inventors: Ma, Rui; Goswami, Sushmit; Teo, Koon Hoo; Duan, Chunjie
      Patent No.: 8,963,644
      Issue Date: Feb 24, 2015
    • Title: "Digital Power Encoder for Direct Digital-RF Transmitter"
      Inventors: Ma, Rui; Zhu, Qiuyao; Teo, Koon Hoo; Duan, Chunjie
      Patent No.: 8,953,670
      Issue Date: Feb 10, 2015
    • Title: "High Electron Mobility Transistor with Multiple Channels"
      Inventors: Teo, Koon Hoo; Feng, Peijie; Ma, Rui
      Patent No.: 8,907,378
      Issue Date: Dec 9, 2014
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