Yohtaro Umeda

Publication Activity (10 Years)

Years Active: 1994-2023
Publications (10 Years): 17

Top Topics

Physical Models

Quantization Noise

Top Venues

Publications

Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano, Shinsuke Hara
From DC to 8 GHz. IEEE Trans. Circuits Syst. I Regul. Pap. 70 (6) (2023)
Sho Okii, Shinsuke Hara, Akifumi Kasamatsu, Yohtaro Umeda, Kyoya Takano
39 - 67 GHz CMOS Multistage Power Amplifier With Two-Way Power Stage. ICICDT (2023)
Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano, Shinsuke Hara
A Compact Fully-Differential Distributed Amplifier with Coupled Inductors in 0.18-µm CMOS Technology. IEICE Trans. Electron. 106 (11) (2023)
Keisuke Kawahara, Joe Sawada, Takumi Kamo, Yohtaro Umeda, Kyoya Takano
A 50 Gbps 49 mW CMOS Analog Multiplexer for a DAC Bandwidth Tripler. RWS (2022)
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
A 76-Gbit/s 265-GHz CMOS Receiver. A-SSCC (2021)
Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano
Design of an Area-Efficient Differential Distributed Amplifier Based on the Theory of Differential Transmission Lines. ISCAS (2021)
Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano
A Broadband Active Balun with Inductor-Less Active Peaking and Imbalance Correction. MWSCAS (2021)
Ryo Kabeya, Yohtaro Umeda, Kyoya Takano
Frequency-Interleaved ADC with RF Equivalent Ideal Filter for Broadband Optical Communication Receivers. ICECS (2021)
Yusuke Yokoi, Yusuke Takai, Joe Sawada, Takumi Kamo, Yohtaro Umeda, Kyoya Takano
DAC Bandwidth Tripler with 3: 1 Image-Rejection Analog Multiplexer. ICECS (2021)
Yuto Tanaka, Yohtaro Umeda, Kyoya Takano
Power-amplifier-inserted Transversal Filter that Recovers Quantization Noise Power by CMOS Rectifier. ICECS (2018)
Jumpei Okumura, Yusuke Kozawa, Yohtaro Umeda, Hiromasa Habuchi
Hybrid PWM/DPAM Dimming Control for Digital Color Shift Keying Using RGB-LED Array. IEEE J. Sel. Areas Commun. 36 (1) (2018)
Tomoaki Morita, Yohtaro Umeda
Comparison between Quadrature-modulation EPWM transmitters with a 90° and 180° hybrid in physical models. ICECS (2018)
Ryo Sakai, Tomoaki Morita, Yohtaro Umeda, Yusuke Kozawa
Quadrature-modulation envelope-pulse-width-modulation transmission system using quadrature polarized waves. MWSCAS (2017)
Ryota Kimoto, Yusuke Kozawa, Yohtaro Umeda, Hiromasa Habuchi
Inverse pulse position modulation schemes for simultaneous visible light wireless information and power transfer. ITNAC (2017)
Yusuke Matsuda, Yusuke Kozawa, Yohtaro Umeda
Cyclic mapping method for digital color shift keying with RGB-LED array. RWS (2017)
Fuminori Sato, Yusuke Kozawa, Yohtaro Umeda
Performance Evaluation of Multiuser Digital Color Shift Keying Using Pseudo-Noise Code with On-Off Signaling. CANDAR (2016)
Shunsuke Igata, Yusuke Kozawa, Yohtaro Umeda, Hiromasa Habuchi
BER performance of digital color shift keying with target color control. ICSPCS (2016)
Naoya Murata, Hiroki Shimamoto, Yusuke Kozawa, Yohtaro Umeda
Performance evaluation of Digital Colour Shift Keying for visible light communications. ICC Workshops (2015)
Hiroki Shimamoto, Yusuke Kozawa, Yohtaro Umeda
An experimental evaluation on EVM performance for 4-CSK(Color Shift Keying) using visible light with multiple full-color LEDs. RWS (2015)
Takashi Ozaki, Yusuke Kozawa, Yohtaro Umeda
Improved error performance of variable PPM for visible light communication. WPMC (2014)
Takashi Ozaki, Yusuke Kozawa, Yohtaro Umeda
Variable multi-pulse PPM using new dimming control method for visible light communications. ISITA (2014)
Osamu Takyu, Yohtaro Umeda, Fumihito Sasamori, Shiro Handa
Resource Block Assignment to Reduce Peak to Average Power Ratio in Multi-User OFDM. IEICE Trans. Commun. (8) (2014)
Shota Fujioka, Michiaki Kojima, Hironori Izumi, Yohtaro Umeda, Osamu Takyu
Power-amplifier-inserted transversal filter for application to pulse-density-modulation switching-mode transmitters. ISCIT (2012)
Osamu Takyu, Yohtaro Umeda, Fumihito Sasamori, Shiro Handa
Theoretical analysis of resource block assignment based on PAPR in two base station cellular system. PIMRC (2012)
Osamu Takyu, Yohtaro Umeda
Optimal subcarrier assignment for single cell multiuser OFDM system. RWS (2012)
Chinnapat Sertthin, Tomoaki Ohtsuki, Osamu Takyu, Takeo Fujii, Yohtaro Umeda
A nearest transmitter classification method for VLC based positioning system. PIMRC (2011)
Chinnapat Sertthin, Takeo Fujii, Osamu Takyu, Yohtaro Umeda, Tomoaki Ohtsuki
On Physical Layer Simulation Model for 6-Axis Sensor Assisted VLC Based Positioning System. GLOBECOM (2011)
Osamu Takyu, Takahiro Saiwai, Takeo Fujii, Yohtaro Umeda
Performance for MAC Level Channel Capacity in Cognitive Radio with Carrier Sense Multiple Access and Transmitting Power Control. VTC Fall (2011)
Osamu Takyu, Yohsuke Seki, Takeo Yamasaki, Takeo Fujii, Yohtaro Umeda, Xiaoqiu Wang, Satoshi Konishi
Fundamental study on adaptive ACK link control for downloading based on TCP connection in mobile wireless communication. PIMRC (2011)
Osamu Takyu, Yohtaro Umeda, Masao Nakagawa
Frequency Rotation for Suppressing Multipath Interference and Achieving Large Frequency Diversity in Uplink IFDMA. IEICE Trans. Commun. (5) (2010)
Takeo Yamasaki, Osamu Takyu, Koichi Adachi, Yohtaro Umeda, Masao Nakagawa
Phase Rotation for Constructing Uniform Frequency Spectrum in IFDMA Communication. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (12) (2010)
Mayumi Suzuki, Osamu Takyu, Yohtaro Umeda
A study of cooperative communication with consideration of power loss caused by relay abortion. ISWCS (2009)
Takeo Yamasaki, Osamu Takyu, Yohtaro Umeda
Scattered Pilot Assisted Channel Estimation for IFDMA Uplink. IEICE Trans. Commun. (12) (2009)
Osamu Takyu, Yohtaro Umeda, Masao Nakagawa
Frequency rotation for suppressing path interference and achieving large frequency diversity in uplink IFDMA. PIMRC (2008)
Makoto Nakamura, Yuki Imai, Yohtaro Umeda, Jun Endo, Yuji Akatsu
1.25-Gb/s burst-mode receiver ICs with quick response for PON systems. IEEE J. Solid State Circuits 40 (12) (2005)
Taiichi Otsuji, Koichi Murata, Takatomo Enoki, Yohtaro Umeda
An 80-Gbit/s multiplexer IC using InAlAs/InGaAs/InP HEMTs. IEEE J. Solid State Circuits 33 (9) (1998)
Taiichi Otsuji, Yuhki Imai, Eiichi Sano, Shunji Kimura, Satoshi Yamaguchi, Mikio Yoneyama, Takatomo Enoki, Yohtaro Umeda
40-Gb/s ICs for future lightwave communications systems. IEEE J. Solid State Circuits 32 (9) (1997)
Makoto Nakamura, Yuhki Imai, Shoji Yamahata, Yohtaro Umeda
Over-30-GHz limiting amplifier ICs with small phase deviation for optical communication systems. IEEE J. Solid State Circuits 31 (8) (1996)
Tsugumichi Shibata, Shunji Kimura, Hideaki Kimura, Yuhki Imai, Yohtaro Umeda, Yukio Akazawa
A design technique for a 60 GHz-bandwidth distributed baseband amplifier IC module. IEEE J. Solid State Circuits 29 (12) (1994)