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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| WBS, MICT | 2017-07-13 13:45 |
Shizuoka | ACT CITY | [Poster Presentation]
A Fundamental Study on DC/AC Separation Filter Design for Underwater Visible Light Communication System with Simultaneous Power Transfer Ryota Kimoto (TUS), Yusuke Kozawa (Ibaraki Univ.), Yohtaro Umeda (TUS), Hiromasa Habuchi (Ibaraki Univ.)  WBS2017-10 MICT2017-12 |
In this study, for constructing flexible underwater wireless sensor network, we discussed underwater visible light commu... [more] | WBS2017-10 MICT2017-12 pp.13-18 |
| MW, ICD | 2017-03-03 09:25 |
Okayama | Okayama Prefectural Univ. | Quadrature-modulation Envelope-pulse-width-modulation Transmission System Using Quadrature Polarized Waves Ryo Sakai, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Science) MW2016-204 ICD2016-134 |
This paper presents quantitative evaluation of power efficiency decrese by not satisfying the zero current switching (ZC... [more] | MW2016-204 ICD2016-134 pp.89-94 |
| MW, ICD | 2017-03-03 10:50 |
Okayama | Okayama Prefectural Univ. | Speeding up using Parallel-Serial conversion in FPGA implementation of quadrature modulation Envelope Pulse Width Modulation Transmitter Kouhei Nagasawa, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Science) MW2016-207 ICD2016-137 |
This paper presents a new configuration using a serializer on quadrature-modulation (QM) envelope-pulse-width-modulation... [more] | MW2016-207 ICD2016-137 pp.107-112 |
| ICD, CPSY | 2016-12-15 15:30 |
Tokyo | Tokyo Institute of Technology | [Poster Presentation]
A Study of High-Speed RGB-LED Driver using Carrier Sweeping out for Visible Light Communications Zicheng Kang, Yusuke Matsuda, Yusuke Kozawa, Yohtaro Umeda (TUS) ICD2016-84 CPSY2016-90 |
Recently, light emitting diodes (LED) are commonly used as a lighting devices. LEDs have lots of advantages, such as hi... [more] |
ICD2016-84 CPSY2016-90 pp.95-100 |
| WBS, RCC, ITS | 2016-12-01 15:30 |
Kagawa | Sunport Hall Takamatsu | [Poster Presentation]
A Study on Hybrid PWM/PAM Dimming Control for Digital Color Shift Keying Using RGB-LED Array Jumpei Okumura, Yusuke Kozawa, Yohtaro Umeda (TUS) WBS2016-66 ITS2016-33 RCC2016-55 |
In this paper, we consider a hybrid pulse width modulation / pulse amplitude modulation (PWM/PAM) system for digital col... [more] | WBS2016-66 ITS2016-33 RCC2016-55 pp.107-112 |
| WBS | 2016-10-06 13:00 |
Kanagawa | National Defense Academy | [Poster Presentation]
A study of illumination performance of digital color shift keying using gaussian LED spectrum model Shunsuke Igata, Yusuke Kozawa, Yohtaro Umeda (TUS) WBS2016-38 |
[more] | WBS2016-38 pp.35-40 |
| WBS | 2016-10-06 13:00 |
Kanagawa | National Defense Academy | [Poster Presentation]
A Study of Color Deviation Mitigation Method for Digital Color Shift Keying using RGB-LED Array Yusuke Matsuda, Yusuke Kozawa, Yohtaro Umeda (TUS) WBS2016-39 |
Digital color shift keying (DCSK) is a visible light communication (VLC) intensity modulation method, which can fulfill ... [more] | WBS2016-39 pp.41-46 |
| SAT, WBS (Joint) |
2016-05-19 14:10 |
Aichi | Nagoya Institute of Technology | Performance evaluation of Digital CSK/CDM systems using Hadamard code with on-off signaling Fuminori Sato, Yusuke kozawa, Yohtaro Umeda (Tokyo Univ. of Science) WBS2016-4 |
In this paper, a digital CSK with CDM (DCSK/CDM) using Hadamard Code with on-off signaling is proposed to avoid the LED ... [more] | WBS2016-4 pp.17-22 |
| SAT, WBS (Joint) |
2016-05-19 14:35 |
Aichi | Nagoya Institute of Technology | Illumination correlated color temperature and its frequency dependence of Digital controlled CSK signal with RGB-LED array Yusuke Matsuda, Yusuke Kozawa, Yohtaro Umeda (Tokyo Univ. of Science) WBS2016-5 |
Digital color shift keying (DCSK) is a visible light communication (VLC) intensity modulation method, which can fulfill ... [more] | WBS2016-5 pp.23-28 |
| MW, WPT | 2016-04-21 10:30 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Application of Window Function in Transversal Filter for Suppressing Quantization Noise in Envelope Pulse-Width Modulation Transmitter Takahito Sasaki, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Science) WPT2016-1 MW2016-1 |
This paper evaluates the improvement in signal to noise power ratio (SNR) in the EPWM transmitter using power-amplifier-... [more] | WPT2016-1 MW2016-1 pp.1-6 |
| ICD, MW | 2016-03-04 12:30 |
Hiroshima | Hiroshima University | A study on narrow bandpass filter in class-D power amplifier for EPWM by cancellation of parasitic capacitance between on-chip spiral inductor and substrate Kunihiko Watanabe, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Science) MW2015-207 ICD2015-130 |
[more] | MW2015-207 ICD2015-130 pp.189-193 |
| ICD, MW | 2016-03-04 12:55 |
Hiroshima | Hiroshima University | Symmetrical Circuit Design in Transmitter and Receiver for Capacitively-Coupled Wireless Power Transfer Ryuichi Namba, Yohtaro Umeda, Yusuke Kozwa (Tokyo Univ. of Science) MW2015-208 ICD2015-131 |
[more] | MW2015-208 ICD2015-131 pp.195-200 |
| RCC, ITS, WBS | 2015-12-17 16:35 |
Okinawa | Okinawa Industry Support Center | A study of the method to avoid the impact of LED non-linearity using multiple multi-color LED for Color Shift Keying Naoya Murata, Yusuke Kozawa, Yohtaro Umeda (Tokyo Univ. of Science) WBS2015-68 ITS2015-40 RCC2015-70 |
In this paper, Digital Color Shift Keying (DCSK) is considered, which represent the symbols using multiple multi-color L... [more] | WBS2015-68 ITS2015-40 RCC2015-70 pp.163-168 |
| WBS | 2015-10-09 11:10 |
Tokyo | Waseda Univ. | A Study of Target Color Control Method for Digital Color Shift Keying Shunsuke Igata, Naoya Murata, Yusuke Kozawa, Yohtaro Umeda (TUS), Hiromasa Habuchi (Ibaraki Univ.) WBS2015-29 |
In this paper, we have proposed the controlling method of the perceived color (i.e., Target Color) in Digital Color Shif... [more] | WBS2015-29 pp.13-18 |
| WBS | 2015-10-09 11:35 |
Tokyo | Waseda Univ. | A Study of Generalised Space Shift Keying Using Multiple Quad LEDs Jumpei Okumura, Naoya Murata, Yusuke Kozawa, Yohtaro Umeda (TUS), Hiromasa Habuchi (Ibaraki Univ.) WBS2015-30 |
In this paper, we consider generalised space shift keying (GSSK) using multiple colour LEDs for improving the error perf... [more] | WBS2015-30 pp.19-24 |
| WBS | 2015-10-09 13:00 |
Tokyo | Waseda Univ. | [Poster Presentation]
A Study of Constellation method for Digital Color Shift Keying Naoya Murata, Yusuke Kozawa, Yohtaro Umeda (Tokyo Univ. of Science) WBS2015-33 |
[more] | WBS2015-33 pp.37-42 |
| WPT, MW | 2015-04-16 15:25 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Design of a 60GHz InGaAs HEMT class-F power amplifier with reactive negative feedback Kunihiko Watanabe, Yohtaro Umeda (Tokyo Univ. of Science), Tomohiro Yoshida, Tetsuya Suemitsu (Tohoku Univ.) WPT2015-4 MW2015-4 |
In this paper, InGaAs HEMT 60GHz Class-F power amplifier (PA) with reactive negative feedback is designed and simulated.... [more] | WPT2015-4 MW2015-4 pp.15-19 |
| WPT, MW | 2015-04-17 09:55 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Study of distance-insensitive electric field coupling resonant wireless power transfer Ryuichi Namba, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Science) WPT2015-9 MW2015-9 |
In recent years, resonant wireless power transmission technology for supplying electric power with high efficiency in el... [more] | WPT2015-9 MW2015-9 pp.45-50 |
| MW, ED | 2015-01-16 14:55 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Comparison of bi- and tri-level drive of CMOS class-D power amplifier in quadrature modulation type EPWM transmitter using a tri-level output delta-sigma modulator Wataru Someya, Takashi Noda, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of science) ED2014-134 MW2014-198 |
[more] | ED2014-134 MW2014-198 pp.99-104 |
| MW, ED | 2015-01-16 15:20 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Higher-order Bandpass Characteristics of Four-path Power-amplifier-inserted Transversal Filter in EPWM Transmitter for FPGA Implementation Kazuaki Watanabe, Shota Fujioka, Takashi Yano, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Science) ED2014-135 MW2014-199 |
This paper designs EPWM transmitter using higher-order band-pass characteristics of 4-path power-amplifier-inserted tran... [more] | ED2014-135 MW2014-199 pp.105-110 |
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