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ORCIDYohtaro Umeda
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Journal Articles
- 2023
[j12]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): 669-676 (2023)- [j11]Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano, Shinsuke Hara:
A 0.0058-mm2 Inductor-Less CMOS Active Balun With Gain and Phase Errors Within -0.1 ± 0.2 dB and -0.18 ± 1.17° From DC to 8 GHz. IEEE Trans. Circuits Syst. I Regul. Pap. 70(6): 2317-2330 (2023) - 2018
- [j10]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): 45-52 (2018) - 2014
- [j9]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. 97-B(8): 1689-1700 (2014) - 2010
- [j8]Osamu Takyu, Yohtaro Umeda, Masao Nakagawa:
Frequency Rotation for Suppressing Multipath Interference and Achieving Large Frequency Diversity in Uplink IFDMA. IEICE Trans. Commun. 93-B(5): 1284-1288 (2010) - [j7]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. 93-A(12): 2672-2681 (2010) - 2009
- [j6]Takeo Yamasaki, Osamu Takyu, Yohtaro Umeda:
Scattered Pilot Assisted Channel Estimation for IFDMA Uplink. IEICE Trans. Commun. 92-B(12): 3803-3814 (2009) - 2005
- [j5]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): 2680-2688 (2005) - 1998
- [j4]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): 1321-1327 (1998) - 1997
- [j3]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): 1363-1370 (1997) - 1996
- [j2]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): 1091-1099 (1996) - 1994
- [j1]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): 1537-1544 (1994)
Conference and Workshop Papers
- 2023
- [c27]Sho Okii, Shinsuke Hara, Akifumi Kasamatsu, Yohtaro Umeda, Kyoya Takano:
39 - 67 GHz CMOS Multistage Power Amplifier With Two-Way Power Stage. ICICDT 2023: 61-63 - 2022
- [c26]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: 125-127 - 2021
- [c25]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: 1-3 - [c24]Ryo Kabeya, Yohtaro Umeda, Kyoya Takano:
Frequency-Interleaved ADC with RF Equivalent Ideal Filter for Broadband Optical Communication Receivers. ICECS 2021: 1-5 - [c23]Yusuke Yokoi, Yusuke Takai, Joe Sawada, Takumi Kamo, Yohtaro Umeda, Kyoya Takano:
DAC Bandwidth Tripler with 3: 1 Image-Rejection Analog Multiplexer. ICECS 2021: 1-6 - [c22]Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano:
Design of an Area-Efficient Differential Distributed Amplifier Based on the Theory of Differential Transmission Lines. ISCAS 2021: 1-5 - [c21]Keisuke Kawahara, Yohtaro Umeda, Kyoya Takano:
A Broadband Active Balun with Inductor-Less Active Peaking and Imbalance Correction. MWSCAS 2021: 749-752 - 2018
- [c20]Tomoaki Morita, Yohtaro Umeda:
Comparison between Quadrature-modulation EPWM transmitters with a 90° and 180° hybrid in physical models. ICECS 2018: 647-648 - [c19]Yuto Tanaka, Yohtaro Umeda, Kyoya Takano:
Power-amplifier-inserted Transversal Filter that Recovers Quantization Noise Power by CMOS Rectifier. ICECS 2018: 653-654 - 2017
- [c18]Ryota Kimoto, Yusuke Kozawa, Yohtaro Umeda, Hiromasa Habuchi:
Inverse pulse position modulation schemes for simultaneous visible light wireless information and power transfer. ITNAC 2017: 1-6 - [c17]Ryo Sakai, Tomoaki Morita, Yohtaro Umeda, Yusuke Kozawa:
Quadrature-modulation envelope-pulse-width-modulation transmission system using quadrature polarized waves. MWSCAS 2017: 1142-1145 - [c16]Yusuke Matsuda, Yusuke Kozawa, Yohtaro Umeda:
Cyclic mapping method for digital color shift keying with RGB-LED array. RWS 2017: 153-155 - 2016
- [c15]Fuminori Sato, Yusuke Kozawa, Yohtaro Umeda:
Performance Evaluation of Multiuser Digital Color Shift Keying Using Pseudo-Noise Code with On-Off Signaling. CANDAR 2016: 147-153 - [c14]Shunsuke Igata, Yusuke Kozawa, Yohtaro Umeda, Hiromasa Habuchi:
BER performance of digital color shift keying with target color control. ICSPCS 2016: 1-6 - 2015
- [c13]Naoya Murata, Hiroki Shimamoto, Yusuke Kozawa, Yohtaro Umeda:
Performance evaluation of Digital Colour Shift Keying for visible light communications. ICC Workshops 2015: 1374-1379 - [c12]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: 206-208 - 2014
- [c11]Takashi Ozaki, Yusuke Kozawa, Yohtaro Umeda:
Variable multi-pulse PPM using new dimming control method for visible light communications. ISITA 2014: 80-84 - [c10]Takashi Ozaki, Yusuke Kozawa, Yohtaro Umeda:
Improved error performance of variable PPM for visible light communication. WPMC 2014: 259-264 - 2012
- [c9]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: 239-244 - [c8]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: 155-160 - [c7]Osamu Takyu, Yohtaro Umeda:
Optimal subcarrier assignment for single cell multiuser OFDM system. RWS 2012: 335-338 - 2011
- [c6]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: 1-5 - [c5]Chinnapat Sertthin, Tomoaki Ohtsuki, Osamu Takyu, Takeo Fujii, Yohtaro Umeda:
A nearest transmitter classification method for VLC based positioning system. PIMRC 2011: 1259-1263 - [c4]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: 2364-2368 - [c3]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: 1-5 - 2009
- [c2]Mayumi Suzuki, Osamu Takyu, Yohtaro Umeda:
A study of cooperative communication with consideration of power loss caused by relay abortion. ISWCS 2009: 531-535 - 2008
- [c1]Osamu Takyu, Yohtaro Umeda, Masao Nakagawa:
Frequency rotation for suppressing path interference and achieving large frequency diversity in uplink IFDMA. PIMRC 2008: 1-5
Coauthor Index
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