Yohtaro Umeda

40 papers B 5C 2Misc 1Journal 13Unranked 19
YearRankTypeTitle / Venue / Authors
2025 J jnl
ADC bandwidth doubler with Nyquist-rate sampling in analog-digital hybrid equivalent ideal filter.
IEICE Electron. Express
Koki Ihara, Yohtaro Umeda, Kyoya Takano
2023 — conf
39 - 67 GHz CMOS Multistage Power Amplifier With Two-Way Power Stage.
ICICDT
Sho Okii, Shinsuke Hara, Akifumi Kasamatsu, Yohtaro Umeda, Kyoya Takano
2023 J jnl
A 0.0058-mm
IEEE Trans. Circuits Syst. I Regul. Pap.
Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano, Shinsuke Hara
2023 J jnl
A Compact Fully-Differential Distributed Amplifier with Coupled Inductors in 0.18-µm CMOS Technology.
IEICE Trans. Electron.
Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano, Shinsuke Hara
2022 — conf
A 50 Gbps 49 mW CMOS Analog Multiplexer for a DAC Bandwidth Tripler.
RWS
Keisuke Kawahara, Joe Sawada, Takumi Kamo, Yohtaro Umeda, Kyoya Takano
2021 — conf
A 76-Gbit/s 265-GHz CMOS Receiver.
A-SSCC
Shinsuke Hara, Ruibing Dong, Sangyeop Lee, Kyoya Takano, Naoya Toshida, Satoru Tanoi, Tatsuo Hagino, Mohamed H. Mubarak, Norihiko Sekine, Issei Watanabe, Akifumi Kasamatsu, Kunio Sakakibara, Shunichi Kubo, Satoshi Miura, Yohtaro Umeda, Takeshi Yoshida, Shuhei Amakawa, Minoru Fujishima
2021 — conf
A Broadband Active Balun with Inductor-Less Active Peaking and Imbalance Correction.
MWSCAS
Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano
2021 — conf
DAC Bandwidth Tripler with 3: 1 Image-Rejection Analog Multiplexer.
ICECS
Yusuke Yokoi, Yusuke Takai, Joe Sawada, Takumi Kamo, Yohtaro Umeda, Kyoya Takano
2021 C conf
Design of an Area-Efficient Differential Distributed Amplifier Based on the Theory of Differential Transmission Lines.
ISCAS
Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano
2021 — conf
Frequency-Interleaved ADC with RF Equivalent Ideal Filter for Broadband Optical Communication Receivers.
ICECS
Ryo Kabeya, Yohtaro Umeda, Kyoya Takano
2018 — conf
Comparison between Quadrature-modulation EPWM transmitters with a 90° and 180° hybrid in physical models.
ICECS
Tomoaki Morita, Yohtaro Umeda
2018 J jnl
Hybrid PWM/DPAM Dimming Control for Digital Color Shift Keying Using RGB-LED Array.
IEEE J. Sel. Areas Commun.
Jumpei Okumura, Yusuke Kozawa, Yohtaro Umeda, Hiromasa Habuchi
2018 — conf
Power-amplifier-inserted Transversal Filter that Recovers Quantization Noise Power by CMOS Rectifier.
ICECS
Yuto Tanaka, Yohtaro Umeda, Kyoya Takano
2017 — conf
Cyclic mapping method for digital color shift keying with RGB-LED array.
RWS
Yusuke Matsuda, Yusuke Kozawa, Yohtaro Umeda
2017 Misc conf
Inverse pulse position modulation schemes for simultaneous visible light wireless information and power transfer.
ITNAC
Ryota Kimoto, Yusuke Kozawa, Yohtaro Umeda, Hiromasa Habuchi
2017 — conf
Quadrature-modulation envelope-pulse-width-modulation transmission system using quadrature polarized waves.
MWSCAS
Ryo Sakai, Tomoaki Morita, Yohtaro Umeda, Yusuke Kozawa
2016 — conf
BER performance of digital color shift keying with target color control.
ICSPCS
Shunsuke Igata, Yusuke Kozawa, Yohtaro Umeda, Hiromasa Habuchi
2016 — conf
Performance Evaluation of Multiuser Digital Color Shift Keying Using Pseudo-Noise Code with On-Off Signaling.
CANDAR
Fuminori Sato, Yusuke Kozawa, Yohtaro Umeda
2015 — conf
An experimental evaluation on EVM performance for 4-CSK(Color Shift Keying) using visible light with multiple full-color LEDs.
RWS
Hiroki Shimamoto, Yusuke Kozawa, Yohtaro Umeda
2015 — conf
Performance evaluation of Digital Colour Shift Keying for visible light communications.
ICC Workshops
Naoya Murata, Hiroki Shimamoto, Yusuke Kozawa, Yohtaro Umeda
2014 — conf
Improved error performance of variable PPM for visible light communication.
WPMC
Takashi Ozaki, Yusuke Kozawa, Yohtaro Umeda
2014 J jnl
Resource Block Assignment to Reduce Peak to Average Power Ratio in Multi-User OFDM.
IEICE Trans. Commun.
Osamu Takyu, Yohtaro Umeda, Fumihito Sasamori, Shiro Handa
2014 C conf
Variable multi-pulse PPM using new dimming control method for visible light communications.
ISITA
Takashi Ozaki, Yusuke Kozawa, Yohtaro Umeda
2012 — conf
Optimal subcarrier assignment for single cell multiuser OFDM system.
RWS
Osamu Takyu, Yohtaro Umeda
2012 — conf
Power-amplifier-inserted transversal filter for application to pulse-density-modulation switching-mode transmitters.
ISCIT
Shota Fujioka, Michiaki Kojima, Hironori Izumi, Yohtaro Umeda, Osamu Takyu
2012 B conf
Theoretical analysis of resource block assignment based on PAPR in two base station cellular system.
PIMRC
Osamu Takyu, Yohtaro Umeda, Fumihito Sasamori, Shiro Handa
2011 B conf
A nearest transmitter classification method for VLC based positioning system.
PIMRC
Chinnapat Sertthin, Tomoaki Ohtsuki, Osamu Takyu, Takeo Fujii, Yohtaro Umeda
2011 B conf
Fundamental study on adaptive ACK link control for downloading based on TCP connection in mobile wireless communication.
PIMRC
Osamu Takyu, Yohsuke Seki, Takeo Yamasaki, Takeo Fujii, Yohtaro Umeda, Xiaoqiu Wang, Satoshi Konishi
2011 B conf
On Physical Layer Simulation Model for 6-Axis Sensor Assisted VLC Based Positioning System.
GLOBECOM
Chinnapat Sertthin, Takeo Fujii, Osamu Takyu, Yohtaro Umeda, Tomoaki Ohtsuki
2011 — conf
Performance for MAC Level Channel Capacity in Cognitive Radio with Carrier Sense Multiple Access and Transmitting Power Control.
VTC Fall
Osamu Takyu, Takahiro Saiwai, Takeo Fujii, Yohtaro Umeda
2010 J jnl
Frequency Rotation for Suppressing Multipath Interference and Achieving Large Frequency Diversity in Uplink IFDMA.
IEICE Trans. Commun.
Osamu Takyu, Yohtaro Umeda, Masao Nakagawa
2010 J jnl
Phase Rotation for Constructing Uniform Frequency Spectrum in IFDMA Communication.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Takeo Yamasaki, Osamu Takyu, Koichi Adachi, Yohtaro Umeda, Masao Nakagawa
2009 — conf
A study of cooperative communication with consideration of power loss caused by relay abortion.
ISWCS
Mayumi Suzuki, Osamu Takyu, Yohtaro Umeda
2009 J jnl
Scattered Pilot Assisted Channel Estimation for IFDMA Uplink.
IEICE Trans. Commun.
Takeo Yamasaki, Osamu Takyu, Yohtaro Umeda
2008 B conf
Frequency rotation for suppressing path interference and achieving large frequency diversity in uplink IFDMA.
PIMRC
Osamu Takyu, Yohtaro Umeda, Masao Nakagawa
2005 J jnl
1.25-Gb/s burst-mode receiver ICs with quick response for PON systems.
IEEE J. Solid State Circuits
Makoto Nakamura, Yuki Imai, Yohtaro Umeda, Jun Endo, Yuji Akatsu
1998 J jnl
An 80-Gbit/s multiplexer IC using InAlAs/InGaAs/InP HEMTs.
IEEE J. Solid State Circuits
Taiichi Otsuji, Koichi Murata, Takatomo Enoki, Yohtaro Umeda
1997 J jnl
40-Gb/s ICs for future lightwave communications systems.
IEEE J. Solid State Circuits
Taiichi Otsuji, Yuhki Imai, Eiichi Sano, Shunji Kimura, Satoshi Yamaguchi, Mikio Yoneyama, Takatomo Enoki, Yohtaro Umeda
1996 J jnl
Over-30-GHz limiting amplifier ICs with small phase deviation for optical communication systems.
IEEE J. Solid State Circuits
Makoto Nakamura, Yuhki Imai, Shoji Yamahata, Yohtaro Umeda
1994 J jnl
A design technique for a 60 GHz-bandwidth distributed baseband amplifier IC module.
IEEE J. Solid State Circuits
Tsugumichi Shibata, Shunji Kimura, Hideaki Kimura, Yuhki Imai, Yohtaro Umeda, Yukio Akazawa