Takuya SAKAMOTO, Ph.D.

  • Visiting Scholar at University of Hawaii at Manoa, USA
    Department of Electrical Engineering
    College of Engineering
    University of Hawaii at Manoa
    2540 Dole Street, Honolulu, HI 96822 USA
  • Associate Professor at University of Hyogo, Japan
    Department of Electronics and Computer Science
    Graduate School of Engineering
    University of Hyogo
    2167 Shosha, Himeji, Hyogo 671-2280, Japan
  • Part-time Researcher at Kyoto University, Japan
    Graduate School of Informatics,
    Kyoto University
    Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan
  • e-mail:
    TEL: +1-808-956-5174 (USA)
    TEL: +81-79-267-4987 (Japan)
    Publications
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  • Research topics Papers and manuscripts
    UWB(Ultra-Wide Band) imaging radar
  • CV
  • Major publications (Publication lists)
    1. Takuya Sakamoto and Toru Sato,
      "A Target shape estimation algorithm for pulse radar systems based on boundary scattering transform,"
      IEICE Transactions on Communications, vol. E87-B, no. 5, pp. 1357-1365, May 2004.
    2. Takuya Sakamoto and Toru Sato,
      "An estimation algorithm of target location and scattered waveforms for UWB pulse radar systems,"
      IEICE Transactions on Communications, vol. E87-B, no. 6, pp. 1631-1638, June 2004.
    3. Takuya Sakamoto, Daisuke Umehara, Yoshiteru Morihiro and Makoto Kawai,
      "A synchronization method for synchronous CDMA broadband communication systems with GEO satellites,"
      IEICE Transactions on Communications, vol. E87-B, no. 8, pp. 2111-2118, Aug. 2004.
    4. Takuya Sakamoto and Toru Sato,
      "A phase compensation algorithm for high-resolution pulse radar systems,"
      IEICE Transactions on Communications, vol. E87-B, no. 11, pp. 3314-3321, Nov. 2004.
    5. (In Japanese)Toru Sato, Takuya Sakamoto,
      "Image reconstruction algorithms for UWB pulse radar systems,"
      IEICE Transactions Japanese Edition, vol. J88-B, no. 12, pp. 2311-2325, Dec. 2005.
    6. Shouhei Kidera, Takuya Sakamoto, Satoshi Sugino, and Toru Sato,
      "An accurate imaging algorithm with scattered waveform estimation for UWB pulse radars,"
      IEICE Transactions on Communications, vol. E89-B, no. 9, pp. 2588-2595, Sep. 2006.
    7. (In Japanese)Takuya Sakamoto, Shouhei Kidera, Toru Sato, Satoshi Sugino,
      "An experimental study on a fast 3-D imaging algorithm for UWB pulse radars,"
      IEICE Transactions Japanese Edition, vol. J90-B, no. 1, pp. 66-73, Jan. 2007.
    8. Takuya Sakamoto,
      "A 2-D image stabilization algorithm for UWB pulse radars with fractional boundary scattering transform,"
      IEICE Transactions on Communications, vol. E90-B, no. 1, pp. 131-139, Jan. 2007.
    9. Takuya Sakamoto,
      "A fast algorithm for 3-dimensional imaging with UWB pulse radar systems,"
      IEICE Transactions on Communications, vol. E90-B, no. 3, pp. 636-644, Mar. 2007.
    10. Shouhei Kidera, Takuya Sakamoto, Toru Sato,
      "A High-Resolution Imaging Algorithm without Derivatives Based on Waveform Estimation for UWB Radars,"
      IEICE Transactions on Communications, vol. E90-B, no. 6, pp. 1487-1494, June 2007.
    11. Shouhei Kidera, Takuya Sakamoto, Toru Sato,
      "A robust and fast imaging algorithm with an envelope of circles for UWB pulse radars,"
      IEICE Transactions on Communications, vol. E90-B, no. 7, pp. 1801-1809, July 2007.
    12. Kentaro Isoda, Takuya Sakamoto, Toru Sato,
      "Effective Echo Detection and Accurate Orbit Estimation Algorithms for Space Debris Radar,"
      IEICE Transactions on Communications, vol. E91-B, no. 3, pp. 887-895, Mar. 2008.
    13. Shouhei Kidera, Takuya Sakamoto, and Toru Sato,
      "High-resolution and real-time 3-D imaging algorithm with envelope of spheres for UWB radars,"
      IEEE Transactions on Geoscience and Remote Sensing, vol. 46, no. 11, pp. 3503-3513, Nov. 2008.
    14. Shouhei Kidera, Yusuke Kani, Takuya Sakamoto, Toru Sato,
      "A fast and high-resolution 3-D imaging algorithm with linear array antennas for UWB pulse radars,"
      IEICE Transactions on Communications, vol. E91-B, no. 8, pp. 2683-2691, Aug. 2008.
    15. Takuya Sakamoto and Toru Sato,
      "2-Dimensional Imaging for Human Bodies with UWB Radar using Approximately Uniform Walking Motion along a Straight Line with the SEABED Algorithm,"
      IEICE Transactions on Communications, vol. E91-B, no. 11, pp. 3695-3703, Nov. 2008.
    16. Takuya Sakamoto and Toru Sato,
      "Code-Division Multiple Transmission for High-Speed UWB Radar Imaging with an Antenna Array,"
      IEEE Transactions on Geoscience and Remote Sensing, vol. 47, no. 4, pp. 1186-1179, April 2009.
    17. Tomoki Kimura, Hirofumi Taki, Takuya Sakamoto and Toru Sato,
      "Experimental study of high range resolution medical acoustic imaging for multiple target detection with frequency domain interferometry,"
      Japanese Journal of Applied Physics, vol. 48, no. 7, 07GJ07, July 2009.
    18. Shouhei Kidera, Takuya Sakamoto, and Toru Sato,
      "High-resolution 3-D Imaging Algorithm with Envelope of Modified Spheres for UWB Through-the-Wall Radars,"
      IEEE Transactions on Antennas & Propagation, vol. 57, no. 11, pp. 3520-3529, Nov. 2009.
    19. Shouhei Kidera, Takuya Sakamoto, and Toru Sato,
      "Accurate UWB Radar 3-D Imaging Algorithm for Complex Boundary without Range Points Connections,"
      IEEE Transactions on Geoscience and Remote Sensing, vol. 48, no. 4, pp. 1993-2004, April 2010.
    20. Hirofumi Taki, Takuya Sakamoto, Makoto Yamakawa, Tsuyoshi Shiina, Toru Sato,
      "Calculus Detection for Ultrasonography Using Decorrelation of Forward Scattered Wave,"
      Journal of Medical Ultasonics, vol. 37, no. 3, pp. 129-135, July 2010.
    21. Yuji Matsuki, Takuya Sakamoto, Toru Sato,
      "An Imaging Algorithm of a Target with Arbitrary Motion for Ultra Wide-Band Radar with a Small Number of Antennas,"
      IEICE Transactions on Communications, vol. E94-B, no. 03, pp. 742-749, March 2011.
    22. Hirofumi Taki, Takuya Sakamoto, Makoto Yamakawa, Tsuyoshi Shiina, Kenichi Nagae and Toru Sato,
      "Small calcification depiction in ultrasound B-mode images using decorrelation of echoes caused by forward scattered waves,"
      Journal of Medical Ultasonics, vol. 38, no. 2, pp. 73-80, April 2011.
    23. Shouhei Kidera, Takuya Sakamoto and Toru Sato,
      "Super-Resolution UWB Radar Imaging Algorithm Based on Extended Capon with Reference Signal Optimization,"
      IEEE Transactions on Antennas & Propagation, vol. 59, no. 5, pp. 1606 - 1615, May 2011.
    24. Takuya Sakamoto, Hirofumi Taki, and Toru Sato,
      "An Experimental Study of Ultrasonic Imaging with a Reduced Number of Array Elements using the Envelope Method,"
      Acoustical Science and Technology (AST), the Acoustical Society of Japan, vol. 32, no. 4, pp. 143-150 July 2011.
    25. Takuya Sakamoto and Toru Sato,
      "Two-Dimensional Ultra-Wide-Band Radar Imaging of a Target with Arbitrary Translation and Rotation,"
      IEEE Transactions on Geoscience and Remote Sensing, vol. 49, no. 11, pp. 4493-4502, Nov. 2011.
    26. Shuhei Fujita, Takuya Sakamoto and Toru Sato,
      "2-Dimensional Accurate Imaging with UWB Radar Using Indoor Multipath Echoes for a Target in Shadow Regions,"
      IEICE Transactions on Communications, vol. E94-B, no. 8, pp. 2366-2374, Aug. 2011.
    27. Shouhei Kidera, Takuya Sakamoto and Toru Sato,
      "Extended Imaging Algorithm Based on Aperture Synthesis with Double Scattered Waves for UWB Radars,"
      IEEE Transactions on Geoscience and Remote Sensing, vol. 49, no. 12, pp. 5128-5139, Dec. 2011.
    28. Hirofumi Taki, Takuya Sakamoto, Makoto Yamakawa, Tsuyoshi Shiina, and Toru Sato,
      "Ultrasound Phantom Using Thin Wires for the Depiction of Calcification -- Comparison of Cross-Sections of Wire Targets and Mass Targets,"
      IEEJ Transactions on Electronics, Information and Systems, vol. 131, no. 9, pp. 1528-1534, Sept. 2011.
    29. Hirofumi Taki, Kousuke Taki, Takuya Sakamoto, Makoto Yamakawa, Tsuyoshi Shiina, Motoi Kudo and Toru Sato,
      "High Range Resolution Ultrasonographic Vascular Imaging Using Frequency Domain Interferometry with the Capon Method,"
      IEEE Transactions on Medical Imaging, vol. 31, no. 2, pp. 417-429, Feb. 2012.
    30. Kenshi Saho, Tomoki Kimura, Shouhei Kidera, Hirofumi Taki, Takuya Sakamoto, and Toru Sato,
      "Robust and Accurate Ultrasound 3-D Imaging Algorithm Incorporating Adaptive Smoothing Techniques,"
      IEICE Transactions on Communications, vol. E95-B, no. 2, pp. 572-580, Feb. 2012.
    31. Takuya Sakamoto, Yuji Matsuki, and Toru Sato,
      "Method for the Three-Dimensional Imaging of a Moving Target using an Ultra-Wideband Radar with a Small Number of Antennas,"
      IEICE Transactions on Communications, vol. E95-B, no. 3, pp. 972-979, March 2012.
    32. Hirofumi Taki, Takuya Sakamoto, Makoto Yamakawa, Tsuyoshi Shiina and Toru Sato
      "High resolution ultrasound imaging using frequency domain interferometry - suppression of interference using adaptive frequency averaging -,"
      IEEJ Transactions on Electronics, Information and Systems, vol. 132, no. 10, pp. 1552-1557, Oct. 2012.
    33. Hirofumi Taki, Takuya Sakamoto, Makoto Yamakawa, Tsuyoshi Shiina and Toru Sato
      "Small calcification indicator in ultrasonography using correlation of echoes with a modified Wiener filter,"
      Journal of Medical Ultasonics, vol. 39, pp. 127-135, July 2012.
    34. Kenshi Saho, Takuya Sakamoto, Toru Sato, Kenichi Inoue, and Takeshi Fukuda,
      "Pedestrian Imaging Using UWB Doppler Radar Interferometry,"
      IEICE Transactions on Communications, vol. E96-B, no. 2, pp. 613-623, Feb. 2013.
    35. Kenshi Saho, Takuya Sakamoto, Toru Sato, Kenichi Inoue, and Takeshi Fukuda,
      "Accurate and Real-Time Pedestrian Classification Based on UWB Doppler Radar Images and Their Radial Velocity Features,"
      IEICE Transactions on Communications, vol. E96-B, no. 10, pp. 2563-2572, Oct. 2013.
    36. Kenshi Saho, Hiroaki Homma, Takuya Sakamoto, Toru Sato, Kenichi Inoue, and Takeshi Fukuda,
      "Accurate Image Separation Method for Two Closely Spaced Pedestrians Using UWB Doppler Imaging Radar and Supervised Learning,"
      IEICE Transactions on Communications, vol. E97-B, no. 6, pp. 1223-1233, June 2014.
    37. Hirofumi Taki, Shinya Tanimura, Takuya Sakamoto, Tsuyoshi Shiina and Toru Sato,
      "Accurate ultrasound imaging based on Range Point Migration method for the depiction of fetal surface,"
      Journal of Medical Ultasonics, DOI: 10.1007/s10396-014-0574-4, Sep. 2014.
    38. Takuya Sakamoto, Toru Sato, Pascal J. Aubry, and Alexander G. Yarovoy,
      "Texture-Based Automatic Separation of Echoes from Distributed Moving Targets in UWB Radar Signals,"
      IEEE Transactions on Geoscience and Remote Sensing, vol. 53, no. 1, pp. 352-361, January 2015.
    39. Takuya Sakamoto, Toru Sato, Pascal Aubry, and Alexander Yarovoy,
      "Ultra-Wideband Radar Imaging using a Hybrid of Kirchhoff Migration and Stolt F-K Migration with an Inverse Boundary Scattering Transform,"
      IEEE Transactions on Antennas and Propagation, vol. 63, no. 8, pp. 3502-3512, Aug. 2015.
    40. Takuya Sakamoto, Ryohei Imasaka, Hirofumi Taki, Toru Sato, Mototaka Yoshioka, Kenichi Inoue, Takeshi Fukuda, and Hiroyuki Sakai,
      "Accurate heartbeat monitoring using ultra-wideband radar,"
      IEICE Electronics Express, vol. 12, no. 3, pp. 20141197, 2015.
    41. Yuan He, Pavlo Molchanov, Takuya Sakamoto, Pascal Aubry, Francois Le Chevalier, and Alexander Yarovoy,
      "Range-Doppler Surface: A Tool to Analyze Human Target in Ultra-Wideband Radar,"
      IET Radar, Sonar & Navigation, vol. 9, no. 9, pp. 1240-1250, DOI: 10.1049/iet-rsn.2015.0065, Dec. 2015.
    42. Takuya Sakamoto, Hiroki Yamazaki, and Toru Sato,
      "Two-dimensional imaging of a pedestrian using multiple wideband Doppler interferometers with clustering-based echo association,"
      IEICE Transactions on Communications, vol. E98-B, no. 9, pp. 1795-1803, Sep. 2015.
    43. Takuya Sakamoto, Shigeaki Okumura, Ryosuke Imanishi, Hirofumi Taki, Toru Sato, Mototaka Yoshioka, Kenichi Inoue, Takeshi Fukuda, and Hiroyuki Sakai,
      "Remote heartbeat monitoring from human soles using 60-GHz ultra-wideband radar Accurate heartbeat monitoring using ultra-wideband radar,"
      IEICE Electronics Express, vol. 12, no. 21, pp. 20150786, 2015.
    44. Hiroki Yamazaki, Takuya Sakamoto, Hirofumi Taki, and Toru Sato,
      "False image suppression in two-dimensional shape estimates of a walking human using multiple ultra-wideband Doppler radar interferometers,"
      IEICE Transactions on Communications, vol. E99-B, no. 1, pp. 134-142, Jan. 2016.
    45. Takuya Sakamoto, Ryohei Imasaka, Hirofumi Taki, Toru Sato, Mototaka Yoshioka, Kenichi Inoue, Takeshi Fukuda, and Hiroyuki Sakai,
      "Feature-based correlation and topological similarity for interbeat interval estimation using ultra-wideband radar,"
      IEEE Transactions on Biomedical Engineering, vol. 63, no. 4, pp. 747-757, April 2016.
    46. Thomas Fromenteze, Ettien Kpre, David Carsenat, Cyril Decroze, and Takuya Sakamoto,
      "Single-shot compressive multiple-inputs multiple-outputs radar imaging using a two-port passive device,"
      IEEE Access, vol. 4, pp. 1050-1060, March 2016.
    47. Takuya Sakamoto, Toru Sato, Pascal Aubry, and Alexander Yarovoy,
      "Fast imaging method for security systems using ultrawideband radar,"
      IEEE Transactions on Aerospace and Electronic Systems, vol. 52, no. 2, pp. 658-670, April 2016.
    48. Shigeaki Okumura, Takuya Sakamoto, Toru Sato, Mototaka Yoshioka, Kenichi Inoue, Takeshi Fukuda, and Hiroyuki Sakai,
      "Comparison of clutter rejection techniques for measurement of small displacements of body surface using radar,"
      Electronics Letters, vol. 52, no. 19, pp. 1635-1637, Sep 15, DOI: 10.1049/el.2016.1461, 2016.
    49. Motoshi Anabuki, Shigeaki Okumura, Takuya Sakamoto, Kenshi Saho, Toru Sato, Mototaka Yoshioka, Kenichi Inoue, Takeshi Fukuda, and Hiroyuki Sakai,
      "Ultra-wideband radar imaging using adaptive array and Doppler separation,"
      IEEE Transactions on Aerospace and Electronic Systems, vol. 53, no. 1, pp. 190-200, Feb. 2017.
    50. Takuya Sakamoto, Daichi Akiyama, Takuro Sato, and Toru Sato,
      "Spectrum-free estimation of Doppler velocities using ultra-wideband radar,"
      IEEE Access, vol. 5, pp. 3240-3249, 2017.
    51. Takuya Sakamoto, Akihiko Matsuoka, and Hidekuni Yomo,
      "Estimation of Doppler velocities from sub-Nyquist ultra-wideband radar measurements,"
      IEEE Sensors Journal, vol. 16, no. 23, pp. 8557-8565, Dec. 2016.
  • Academic societies
    Institute of Electronics, Information, and Communication Engineers (IEICE)
    The Institute of Electrical Engineers of Japan (IEEJ)
    The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
  • Teaching
  • Social activities
  • Education
    Jan. 24, 2005 Completion of Doctor Course of Graduate School of Informatics, Kyoto Univ.
    Apr. 1, 2002 Entrance into Doctor Course of Graduate School of Informatics, Kyoto Univ.
    Mar. 25, 2002 Completion of Master Course of Graduate School of Informatics, Kyoto Univ.
    Apr. 1, 2000 Entrance into Master Course of Graduate School of Informatics, Kyoto Univ.
    Mar. 24, 2000 Graduation from School of Electrical and Electronic Engineering, Kyoto Univ.
    Apr. 1, 1996, Entrance into School of Electrical and Electronic Engineering, Kyoto Univ.
  • Academic degrees
    Jan. 24, 2005 Ph.D. in Informatics (Kyoto Univ.) (no.136)
    "Nonparametric Imaging Algorithms for UWB Pulse Radars"
  • Employment
  • Language skills
  • Media
  • Seminars
  • Invited Talks
  • Awards
  • Patent
    1. Takeshi Fukuda, Kenichi Inoue, Toru Sato, Takuya Sakamoto, Kenshi Saho, US Patent 8,686,894
    2. Toru Sato, Takuya Sakamoto, Takeshi Fukuda, and Mototaka Yoshioka, Japanese Domenstic Patent 2015-104614.
    3. Hirofumi Taki, Toru Sato, Takuya Sakamoto, Tomoki Kimura, and Kenichi Nagae, Japanese Domenstic Patent 2013-176697.
    4. Hirofumi Taki, Takuya Sakamoto, Toru Sato, and Kenichi Nagae, Japanese Domenstic Patent 2013-052074.
    5. Hirofumi Taki, Takuya Sakamoto, Toru Sato, and Kenichi Nagae, Japanese Domenstic Patent 2013-052073.
    6. Hirofumi Taki, Toru Sato, Takuya Sakamoto, Tomoki Kimura, and Kenichi Nagae, Japanese Domenstic Patent 2010-183979.
    7. Hiroyuki Sakai, Takeshi Fukuda, Kenichi Inoue, Toru Sato, Takuya Sakamoto, and Yusuke Kani, Japanese Domenstic Patent 2009-222592.
    8. Takayuki Kitamura, Takuya Sakamoto, and Toru Sato, Japanese Domenstic Patent 2009-204572.
    9. Shohei Kidera, Takuya Sakamoto, and Toru Sato, Japanese Domenstic Patent 2009-025030.
    10. Shohei Kidera, Takuya Sakamoto, and Toru Sato, Japanese Domenstic Patent 2006-343205.
    11. Hiroyuki Sakai, Takeshi Fukuda, Toru Sato, Takuya Sakamoto, and Kenshi Saho, Japanese Domenstic Patent 2012/020530.
    12. Hiroyuki Sakai, Takeshi Fukuda, Takuya Sakamoto, and Toru Sato, Japanese Domenstic Patent 2008/139687.
    13. WO2008/139687, Hiroyuki Sakai, Takeshi Fukuda, Takuya Sakamoto, Toru Sato, Shape measurement instrument and shape measurement method
    14. WO/2013/032021, Kenichi Nagae, Hirofumi Taki, Takuya Sakamoto, Toru Sato, SUBJECT INFORMATION OBTAINING APPARATUS, METHOD FOR OBTAINING SUBJECT INFORMATION, AND PROGRAM.
    15. WO/2013/032018, Kenichi Nagae, Hirofumi Taki, Takuya Sakamoto, Toru Sato, SUBJECT INFORMATION OBTAINING APPARATUS, SUBJECT INFORMATION OBTAINING METHOD.
  • Theses Examined
    1. Leonardo Carrer, Concealed Weapon Detection, Master of Science Thesis, Delft University of Technology, May 29, 2012.

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