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All Technical Committee Conferences (All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| MW, ED | 2021-01-29 14:50 |
Online | Online | A study on precise extraction of parasitic resistances in InGaAs HEMTs Keigo Yaguchi (Tokyo Univ. of Science), Tomotaka Hosotani (Tohoku Univ.), Yohtaro Umeda, Kyoya Takano (Tokyo Univ. of Science), Tetsuya Suemitsu, Akira Satou (Tohoku Univ.) |
(To be available after the conference date) [more] | |
| MW (2nd) |
2020-05-13 - 2020-05-15 |
Overseas | CU, Bangkok, Thailand (Postponed) |
Design of a 135GHz Marchand Balun in 40nm CMOS Technology Hajime Sakai, Kyoya Takano, Yohtaro Umeda (Tokyo Univ. of Science) |
The use of the D band (110-170 GHz) as the intermediate frequency band (IF band) of the 300 GHz band CMOS wireless commu... [more] | |
| MW (2nd) |
2020-05-13 - 2020-05-15 |
Overseas | CU, Bangkok, Thailand (Postponed) |
A 135GHz Frequency Tripler in 40 nm CMOS Technology Koki Sekine, Kyoya Takano, Yohtaro Umeda (Tokyo Univ. of Science) |
With the spread of IoT, high-speed and large-capacity wireless communication has been demanded. Therefore, the IEEE Std ... [more] | |
| MW (2nd) |
2020-05-13 - 2020-05-15 |
Overseas | CU, Bangkok, Thailand (Postponed) |
Design of 45GHz Frequency Trippler in 40nm CMOS Technology Kenta Sahara, Kyoya Takano, Yohtaro Umeda (Tokyo Univ. of Science) |
As a circuit constituting a wireless communication device, a frequency tripler plays an important role as a circuit for ... [more] | |
| ICD, CPSY, CAS | 2018-12-21 13:30 |
Okinawa | Power-amplifier-inserted Transversal Filter that Recovers Quantization Noise Power by CMOS Rectifier Yuto Tanaka, Yohtaro Umeda, Kyoya Takano (Tokyo University of Science)  CAS2018-78 ICD2018-62 CPSY2018-44 |
In this paper, we aim to improve power efficiency by using a CMOS rectifier for power-amplifier-inserted transversal fil... [more] | CAS2018-78 ICD2018-62 CPSY2018-44 pp.1-5 |
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| WBS, ITS, RCC | 2018-12-06 10:00 |
Okinawa | Miyako Island Hirara Port Terminal Bldg. | [Poster Presentation]
A Study on Underwater Visible Light Simultaneous Wireless Information and Power Transfer System using Inverse Pulse Position Modulation Ryota Kimoto (TUS), Yusuke Kozawa (Ibaraki Univ.), Yohtaro Umeda (TUS), Hiromasa Habuchi (Ibaraki Univ.) WBS2018-32 ITS2018-15 RCC2018-63 |
In this paper, for constructing flexible underwater wireless network, we discussed visible light simultaneous wireless i... [more] | WBS2018-32 ITS2018-15 RCC2018-63 pp.29-34 |
| ICD, CPSY, CAS | 2017-12-14 11:00 |
Okinawa | Art Hotel Ishigakijima | A Study on Wireless Transmitter with Up-converted Root-Cosine Roll-off Waveform Iroi Yamamoto, Yohtaro Umeda (Tokyo Univ. of Science) CAS2017-67 ICD2017-55 CPSY2017-64 |
In this paper, we reconfigure the conventional analog signal processing transmitter and propose an all-digital transmitt... [more] | CAS2017-67 ICD2017-55 CPSY2017-64 pp.21-26 |
| MW, EMCJ, EST, IEE-EMC [detail] | 2017-10-19 09:40 |
Akita | Yupopo | Comparison of Power Combining Methods in Power-amplifier-inserted Transversal Filter for EPWM Transmitters Yuto Tanaka, Yohtaro Umeda (TUS), Yusuke Kozawa (Ibaraki Univ.) EMCJ2017-32 MW2017-84 EST2017-47 |
This paper compares power-amplifier-inserted transversal filter (PAITF) with 180º hybrids and T-junctions for envelope p... [more] | EMCJ2017-32 MW2017-84 EST2017-47 pp.11-15 |
| MW, EMCJ, EST, IEE-EMC [detail] | 2017-10-20 10:25 |
Akita | Yupopo | A Quadrature-modulation EPWM Transmitter That Uses Co-phase Sine Wave Carriers for I/Q Channel and a 90° Hybrid as a Signal Combiner Tomoaki Morita, Ryo Sakai, Yohtaro Umeda (Tokyo Univ. of Science), Yusuke Kozawa (Ibaraki Univ.) EMCJ2017-45 MW2017-97 EST2017-60 |
Quadrature-modulation (QM) envelope-pulse-width modulation (EPWM) transmitter with a 180° hybrid as a power combiner has... [more] | EMCJ2017-45 MW2017-97 EST2017-60 pp.105-110 |
| MW, EMCJ, EST, IEE-EMC [detail] | 2017-10-20 10:45 |
Akita | Yupopo | A Simple Design of 2.45GHz Class-F Time-Reversal Rectifier Using Linear Theory Fuminori Myojin, Yohtaro Umeda (TUS) EMCJ2017-46 MW2017-98 EST2017-61 |
In this paper, a theoretical design of class-F time-reversal rectifier is proposed. By considering phase and amplitude o... [more] | EMCJ2017-46 MW2017-98 EST2017-61 pp.111-116 |
| WBS | 2017-10-12 15:00 |
Wakayama | Rivage Spa Hikigawa (Nanki Shirahama) | [Poster Presentation]
Experimental Evaluation of PWM/DPAM Hybrid Dimming Control Method for DCSK Yusuke Matsuda (TUS), Yusuke Kozawa (Ibaraki Univ.), Yohtaro Umeda (TUS) WBS2017-27 |
Digital color shift keying (DCSK) is a visible light communication (VLC) intensity modulation method, which can fulfill ... [more] | WBS2017-27 pp.21-26 |
| SDM, ICD, ITE-IST [detail] | 2017-08-02 13:45 |
Hokkaido | Hokkaido-Univ. Multimedia Education Bldg. | Multi-carrier Transmission Characteristics of All-Digital Low-IF Transmitter Using Weber-Type Image Suppression Method Takumi Kamo, Yohtaro Umeda (Tokyo Univ. of Science), Yusuke Kozawa (Ibaraki Univ.) SDM2017-47 ICD2017-35 |
In this paper, multicarrier transmission is performed by using a bandpass type (BP) ΔΣ modulator in an orthogonal modula... [more] | SDM2017-47 ICD2017-35 pp.117-122 |
| SDM, ICD, ITE-IST [detail] | 2017-08-02 14:10 |
Hokkaido | Hokkaido-Univ. Multimedia Education Bldg. | A Quadrature-modulation EPWM Transmitter with Parallel-Output MASH Delta-Sigma Modulator Takumi Yamamoto, Yohtaro Umeda (Tokyo Univ. of Science), Yusuke Kozawa (Ibaraki Univ.) SDM2017-48 ICD2017-36 |
In this paper, Multi StAge Noise Shaping (MASH) architecture is employed to realize high noise reduction capability by n... [more] | SDM2017-48 ICD2017-36 pp.123-128 |
| 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 |
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