MERL - Mitsubishi Electric Research Laboratories

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Rui Ma

Rui Ma
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  • 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

    •  NEWS   MERL Researcher, Rui Ma, appointed Associate Editor, IEEE Journal-ERM
      Date: December 13, 2019
      Where: IEEE
      MERL Contact: Rui Ma
      Brief
      • Dr. Rui Ma has been appointed as Associate Editor of IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology (IEEE J-ERM).

        IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology, sponsored by IEEE Microwave Theory and Techniques Society (MTT-S), Antennas and Propagation Society (APS), Engineering in Medicine and Biology Society (EMBS) and Sensor Councils (with 26 IEEE member societies), encourages the submission of manuscripts with scopes in state-of-the-art research related to electromagnetics theory, RF and Microwave techniques and integration for medical and biological applications.
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    •  NEWS   MERL Scientists Presenting 11 Papers at IEEE Global Communications Conference (GLOBECOM) 2019
      Date: December 9, 2019 - December 13, 2019
      Where: Waikoloa, Hawaii, USA
      MERL Contacts: Jianlin Guo; Kyeong Jin (K.J.) Kim; Toshiaki Koike-Akino; Rui Ma; Philip Orlik; Pu (Perry) Wang
      Research Areas: Communications, Computer Vision, Machine Learning, Signal Processing, Information Security
      Brief
      • MERL Signal Processing scientists and collaborators will be presenting 11 papers at the IEEE Global Communications Conference (GLOBECOM) 2019, which is being held in Waikoloa, Hawaii from December 9-13, 2019. Topics to be presented include recent advances in power amplifier, MIMO algorithms, WiFi sensing, video casting, visible light communications, user authentication, vehicular communications, secrecy, and relay systems, including sophisticated machine learning applications. A number of these papers are a result of successful collaboration between MERL and world-leading Universities including: Osaka University, University of New South Wales, Oxford University, Princeton University, South China University of Technology, Massachusetts Institute of Technology and Aalborg University.

        GLOBECOM is one of the IEEE Communications Society’s two flagship conferences dedicated to driving innovation in nearly every aspect of communications. Each year, more than 3000 scientific researchers and their management submit proposals for program sessions to be held at the annual conference. Themed “Revolutionizing Communications,” GLOBECOM2019 will feature a comprehensive high-quality technical program including 13 symposia and a variety of tutorials and workshops to share visions and ideas, obtain updates on latest technologies and expand professional and social networking.
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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

    • MD1370: Machine Learning based DPD for Power Amplifier

      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.

    • MD1441: Advanced Phased Array Transceiver

      MERL is looking for a highly motivated, and qualified individual to join our internship program of advanced phased array research. The ideal candidate should be a senior Ph.D. student with rich experience in beam forming technologies. Knowledge of wireless communication, transceiver architecture, and digital signal processing, FPGA and/or Matlab programming skills are required. RF circuits knowledge will be a plus. Duration is 3-6 months with a flexible start date.

    See All Internships at MERL

  • MERL Publications

    •  Tanovic, O., Ma, R., Orlik, P.V., Megretski, A., "Optimal Power Encoding of OFDM Signals in All-Digital Transmitters", IEEE Global Communications Conference (GLOBECOM), DOI: 10.1109/GLOBECOM38437.2019.9014289, December 2019, pp. 1-6.
      BibTeX TR2019-137 PDF
      • @inproceedings{Tanovic2019dec,
      • author = {Tanovic, Omer and Ma, Rui and Orlik, Philip V. and Megretski, Aleksandre},
      • title = {Optimal Power Encoding of OFDM Signals in All-Digital Transmitters},
      • booktitle = {IEEE Global Communications Conference (GLOBECOM)},
      • year = 2019,
      • pages = {1--6},
      • month = dec,
      • publisher = {IEEE},
      • doi = {10.1109/GLOBECOM38437.2019.9014289},
      • issn = {2576-6813},
      • isbn = {978-1-7281-0962-6},
      • url = {https://www.merl.com/publications/TR2019-137}
      • }
    •  Yamashita, G., Tsujita, W., Tsutada, H., Ma, R., Wang, P., Orlik, P.V., Suzuki, S., Dobroiu, A., Asada, M., "Terahertz Polarimetric Sensing for Linear Encoder Based on a Resonant-Tunneling-Diode and CFRP polarizing plates", International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), DOI: 10.1109/IRMMW-THz.2019.8873859, September 2019, pp. 1-2.
      BibTeX TR2019-089 PDF
      • @inproceedings{Yamashita2019sep,
      • author = {Yamashita, Genki and Tsujita, Wataru and Tsutada, Hiroyuki and Ma, Rui and Wang, Pu and Orlik, Philip V. and Suzuki, Safumi and Dobroiu, Adrian and Asada, M.},
      • title = {Terahertz Polarimetric Sensing for Linear Encoder Based on a Resonant-Tunneling-Diode and CFRP polarizing plates},
      • booktitle = {International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)},
      • year = 2019,
      • pages = {1--2},
      • month = sep,
      • doi = {10.1109/IRMMW-THz.2019.8873859},
      • issn = {2162-2027},
      • url = {https://www.merl.com/publications/TR2019-089}
      • }
    •  Wang, P., Koike-Akino, T., Bose, A., Ma, R., Orlik, P.V., Tsujita, W., Sadamoto, K., Tsutada, H., Soltanalian, M., "Learning-Based Shadow Mitigation for Terahertz Multi-Layer Imaging", International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), DOI: 10.1109/IRMMW-THz.2019.8874429, September 2019.
      BibTeX TR2019-090 PDF
      • @inproceedings{Wang2019sep,
      • author = {Wang, Pu and Koike-Akino, Toshiaki and Bose, Arindam and Ma, Rui and Orlik, Philip V. and Tsujita, Wataru and Sadamoto, Kota and Tsutada, Hiroyuki and Soltanalian, Mojtaba},
      • title = {Learning-Based Shadow Mitigation for Terahertz Multi-Layer Imaging},
      • booktitle = {International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)},
      • year = 2019,
      • month = sep,
      • doi = {10.1109/IRMMW-THz.2019.8874429},
      • issn = {2162-2035},
      • isbn = {978-1-5386-8285-2},
      • url = {https://www.merl.com/publications/TR2019-090}
      • }
    •  Sangwan, A., Ma, R., Wang, B., Kim, K.J., Parsons, K., Koike-Akino, T., Wang, P., Orlik, P.V., Teo, K.H., Tasuku, K., Kazunari, K., Fukasawa, T., "CDM-based 4-Channel Digital Beamforming Transmitter Using a Single DAC", IEEE International New Circuits and Systems Conference, DOI: 10.1109/NEWCAS44328.2019.8961250, June 2019, pp. 1-4.
      BibTeX TR2019-058 PDF
      • @inproceedings{Sangwan2019jun,
      • author = {Sangwan, Amit and Ma, Rui and Wang, Bingnan and Kim, Kyeong Jin and Parsons, Kieran and Koike-Akino, Toshiaki and Wang, Pu and Orlik, Philip V. and Teo, Koon Hoo and Tasuku, Kuriyama and Kazunari, Kihira and Fukasawa, Toru},
      • title = {CDM-based 4-Channel Digital Beamforming Transmitter Using a Single DAC},
      • booktitle = {IEEE International New Circuits and Systems Conference},
      • year = 2019,
      • pages = {1--4},
      • month = jun,
      • publisher = {IEEE},
      • doi = {10.1109/NEWCAS44328.2019.8961250},
      • isbn = {978-1-7281-1031-8},
      • url = {https://www.merl.com/publications/TR2019-058}
      • }
    •  Komatsuszaki, Y., Sakata, S., Nakatani, K., Shinjo, S., Ma, R., Benosman, M., Nagai, Y., "A Novel 1.4-4.8 GHz Ultra-Wideband, over 45% High Efficiency Digitally Assisted Frequency-Periodic Load Modulated Amplifier", IEEE International Microwave Symposium (IMS), DOI: 10.1109/MWSYM.2019.8700930, June 2019, pp. 706-709.
      BibTeX TR2019-041 PDF
      • @inproceedings{Komatsuszaki2019jun,
      • author = {Komatsuszaki, Yuji and Sakata, Shuichi and Nakatani, Keigo and Shinjo, Shintaro and Ma, Rui and Benosman, Mouhacine and Nagai, Yukimasa},
      • title = {A Novel 1.4-4.8 GHz Ultra-Wideband, over 45% High Efficiency Digitally Assisted Frequency-Periodic Load Modulated Amplifier},
      • booktitle = {IEEE International Microwave Symposium (IMS)},
      • year = 2019,
      • pages = {706--709},
      • month = jun,
      • publisher = {IEEE},
      • doi = {10.1109/MWSYM.2019.8700930},
      • issn = {2576-7216},
      • isbn = {978-1-7281-1309-8},
      • url = {https://www.merl.com/publications/TR2019-041}
      • }
    See All Publications for Rui

  • MERL Issued Patents

    • 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
    See All Patents for MERL