• 527 Citations
  • 12 h-Index
1988 …2019
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Research Output 1988 2019

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Conference contribution
2019

Optical radio channel propagation in wireless communication systems with LEDs

Denno, S., Fujitaka, S., Hou, Y., Tomisato, S. & Uehara, K., May 1 2019, GSMM 2019 - 12th Global Symposium on Millimeter Waves, Proceeding. Institute of Electrical and Electronics Engineers Inc., p. 50-52 3 p. 8797650. (GSMM 2019 - 12th Global Symposium on Millimeter Waves, Proceeding).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

wireless communication
Light emitting diodes
telecommunication
Communication systems
light emitting diodes
2018

Transmission quality improvement by LED back-off optimization for visible light wireless communications

Chikamori, T., Tomisato, S., Denno, S. & Uehara, K., Feb 22 2018, Proceedings - 20th International Symposium on Wireless Personal Multimedia Communications, WPMC 2017. IEEE Computer Society, Vol. 2017-December. p. 229-233 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Light emitting diodes
Linearization
Communication
Orthogonal frequency division multiplexing
Computer simulation
2016
5 Citations (Scopus)

Interference alignment and power allocation for multi-user MIMO interference channels

Panahi, F. H., Ohtsuki, T., Jiang, W., Takatori, Y. & Uehara, K., Jul 12 2016, 2016 IEEE International Conference on Communications, ICC 2016. Institute of Electrical and Electronics Engineers Inc., 7510851

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Base stations
Channel state information
Multiplexing
Topology
Feedback
2 Citations (Scopus)

Joint interference alignment and power allocation under perfect and imperfect CSI

Panahi, F. H., Ohtsuki, T., Jiang, W., Takatori, Y. & Uehara, K., 2016, 2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 7841926

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Channel state information
Base stations
Multiplexing
Topology
Feedback
2013
6 Citations (Scopus)

A broadband low-noise wide dynamic range SiGe front-end receiver IC for multi-band access points

Kaho, T., Yamaguchi, Y., Shiba, H., Kawashima, M., Toshinaga, H. & Uehara, K., 2013, 2013 Asia-Pacific Microwave Conference Proceedings, APMC 2013. p. 267-269 3 p. 6695115

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Low noise amplifiers
Gain control
Buffer amplifiers
Mixer circuits
Noise figure
2 Citations (Scopus)

A new architecture for concurrent dual-band digital predistortion

Ando, I., Tran, G. K., Araki, K., Yamada, T., Kaho, T., Yamaguchi, Y. & Uehara, K., 2013, 2013 Asia-Pacific Microwave Conference Proceedings, APMC 2013. p. 152-154 3 p. 6695221

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Broadband amplifiers
Power amplifiers
Linearization
Feedback
Costs
2 Citations (Scopus)

Study on short-range MIMO transmission using interference cancellation by antenna directivities

Arai, M., Seki, T., Hiraga, K., Nakagawa, T. & Uehara, K., 2013, 2013 Asia-Pacific Microwave Conference Proceedings, APMC 2013. p. 395-397 3 p. 6695158

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Channel capacity
Antennas
Bandwidth
Beamforming
Millimeter waves
2012
3 Citations (Scopus)

1-bit compressed sensing with edge detection for compressed radio wave data transfer

Yamada, T., Lee, D., Toshinaga, H., Akabane, K., Yamaguchi, Y. & Uehara, K., 2012, APCC 2012 - 18th Asia-Pacific Conference on Communications: "Green and Smart Communications for IT Innovation". p. 407-411 5 p. 6388170

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Compressed sensing
Radio waves
Edge detection
Data transfer
Servers
3 Citations (Scopus)

A dual-band simultaneous receiving mixer with independent and linear gain control

Kaho, T., Yamaguchi, Y., Shiba, H., Akabane, K. & Uehara, K., 2012, 2012 Asia-Pacific Microwave Conference, APMC 2012 - Proceedings. p. 160-162 3 p. 6421532

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Gain control
Power control
Topology
1 Citation (Scopus)

A method for controlling phase difference between propagation channels for short-range MIMO transmission

Sakamoto, K., Hiraga, K., Seki, T., Nakagawa, T. & Uehara, K., 2012, Conference Proceedings of the 2012 International Symposium on Antennas and Propagation, ISAP 2012. p. 754-757 4 p. 6393964

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Local area networks
Transmitters
Antennas
Bandwidth
Communication
1 Citation (Scopus)

Sparse-matrix-based compressed sensing for spectrum sensing in Flexible Wireless System

Lee, D., Kabashima, Y., Takeda, K., Yamada, T., Akabane, K. & Uehara, K., 2012, APCC 2012 - 18th Asia-Pacific Conference on Communications: "Green and Smart Communications for IT Innovation". p. 418-422 5 p. 6388172

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Compressed sensing
Servers
Signal processing
Radio waves
Adders
8 Citations (Scopus)

Spectrum sensing for networked system using 1-bit compressed sensing with partial random circulant measurement matrices

Lee, D., Sasaki, T., Yamada, T., Akabane, K., Yamaguchi, Y. & Uehara, K., 2012, IEEE 75th Vehicular Technology Conference, VTC Spring 2012 - Proceedings. 6240259

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Compressed sensing
Spectrum Sensing
Compressed Sensing
Partial
Circulant Matrix
2011
12 Citations (Scopus)

A simultaneous receiving multi-band mixer with independent gain control

Kaho, T., Yamaguchi, Y., Shiba, H., Akabane, K., Uehara, K. & Araki, K., 2011, Asia-Pacific Microwave Conference Proceedings, APMC 2011. p. 383-386 4 p. 6173766

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Gain control
Power control
Diodes
1 Citation (Scopus)

High speed parallel data transmission and power transmission technology for wireless repeater system

Seki, T., Hiraga, K., Nishimori, K., Nishikawa, K. & Uehara, K., 2011, Proceedings of the 5th European Conference on Antennas and Propagation, EUCAP 2011. p. 3913-3916 4 p. 5782427

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Telecommunication repeaters
Power transmission
Data communication systems
Insertion losses
Millimeter waves
4 Citations (Scopus)

Signal separation and reconstruction method for simultaneously received multi-system signals in a unified wireless system

Yamada, T., Lee, D., Shiba, H., Yamaguchi, Y. & Uehara, K., 2011, Proceedings of the 2011 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2011. p. 136-140 5 p. 6030763

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Signal systems
reconstruction
Radio waves
computer simulation
Fourier transforms
2010
2 Citations (Scopus)

A compact K/Ka-band transceiver MMIC using GaAs 3D-MMIC technology

Kaho, T., Yamaguchi, Y. & Uehara, K., 2010, 2010 Asia-Pacific Microwave Conference Proceedings, APMC 2010. p. 822-825 4 p. 5728467

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Monolithic microwave integrated circuits
Transceivers
Frequency doublers
Thermal noise
Noise figure
4 Citations (Scopus)

Multi-layer coupled band-pass filter for 60 GHz LTCC system-on-package

Hiraga, K., Seki, T., Nishikawa, K. & Uehara, K., 2010, 2010 Asia-Pacific Microwave Conference Proceedings, APMC 2010. p. 259-262 4 p. 5728695

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Bandpass filters
Multilayers
Substrates
Fabrication
Millimeter waves
2 Citations (Scopus)

Ultra compact RFICs using three-dimensional MMIC technology

Kaho, T., Yamaguchi, Y., Nishikawa, K., Toyoda, I. & Uehara, K., 2010, 2010 IEEE MTT-S International Microwave Symposium, MTT 2010. p. 1304-1307 4 p. 5517752

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Microwave integrated circuits
microwave circuits
integrated circuits
Millimeter waves
millimeter waves
1 Citation (Scopus)

Ultra-high-speed transmission over millimeter-wave using microstrip antenna array

Hiraga, K., Seki, T., Nishimori, K., Nishikawa, K. & Uehara, K., 2010, 2010 IEEE Radio and Wireless Symposium, RWW 2010 - Paper Digest. p. 673-676 4 p. 5434243

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Channel capacity
Microstrip antennas
Antenna arrays
Millimeter waves
Antennas
2009
4 Citations (Scopus)

60-GHz microstrip antenna with stacked rings using multi-layer LTCC substrate

Seki, T., Hiraga, K., Nishikawa, K. & Uehara, K., 2009, European Conference on Antennas and Propagation, EuCAP 2009, Proceedings. p. 3797-3800 4 p. 5068416

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Microstrip antennas
Antennas
simulation
Substrates
performance
2 Citations (Scopus)

A compact X-band balanced frequency doubler on GaAs pHEMT 3D MMIC

Kaho, T., Yamaguchi, Y., Okazaki, H. & Uehara, K., 2009, 2009 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2009. p. 237-240 4 p. 5383706

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Frequency doublers
Monolithic microwave integrated circuits
Bandpass filters
Microstrip lines
Electric power utilization

Small size base station antenna using phase difference feed for narrowband ubiquitous communication

Seki, T., Hiraga, K., Nishikawa, K. & Uehara, K., 2009, IEEE MTT-S International Microwave Workshop Series on Wireless Sensing, Local Positioning and RFID - Proceedings, IMWS 2009 - Croatia. 5307864

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Antenna feeders
Base stations
Antennas
Communication
Antenna arrays

Ultra high speed short-range parallel transmission using millimeter-wave frequency band

Hiraga, K., Seki, T., Nishimori, K., Nishikawa, K. & Uehara, K., 2009, APMC 2009 - Asia Pacific Microwave Conference 2009. p. 1212-1215 4 p. 5384427

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Millimeter waves
Frequency bands
Channel capacity
Antennas
Antenna arrays
2008
8 Citations (Scopus)

A cooperative sensing technique with weighting based on distance between radio stations

Matsui, M., Shiba, H., Akabane, K. & Uehara, K., 2008, 2008 14th Asia-Pacific Conference on Communications, APCC 2008. 4773672

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Radio stations
Radio waves
Cognitive radio
weighting
radio
6 Citations (Scopus)

Channel assignment and reallocation algorithms for cognitive radio systems

Hiraga, K., Akabane, K., Shiba, H. & Uehara, K., 2008, 2008 14th Asia-Pacific Conference on Communications, APCC 2008. 4773702

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Radio systems
Cognitive radio
radio
resources
computer simulation
2 Citations (Scopus)

Prototype of a cognitive radio system with cooperative sensing and interference alerting

Matsui, M., Akabane, K., Shiba, H. & Uehara, K., 2008, Proceedings of the 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CrownCom 2008. 4562482

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Radio interference
Radio systems
Cognitive radio
interference
radio
2007
1 Citation (Scopus)

A dual-band VCO integrated with RF-MEMS switches and inductors

Kawashima, M., Yamaguchi, Y., Kuwabara, K., Sato, N., Machida, K. & Uehara, K., 2007, Proceedings of the 36th European Microwave Conference, EuMC 2006. p. 795-798 4 p. 4057938

Research output: Chapter in Book/Report/Conference proceedingConference contribution

voltage controlled oscillators
Variable frequency oscillators
inductors
microelectromechanical systems
MEMS
9 Citations (Scopus)

A highly integrated quasi-millimeter wave receiver chip using 3D-MMIC technology

Kaho, T., Yamaguchi, Y., Uehara, K., Nagamine, S., Toriyama, Y. & Taniguchi, T., 2007, European Microwave Week 2007 Conference Proceedings, EuMW 2007 - 2nd European Microwave Integrated Circuits Conference, EuMIC 2007. p. 12-15 4 p. 4412635

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Monolithic microwave integrated circuits
Millimeter waves
recipient
Frequency bands
Demodulators
4 Citations (Scopus)

A highly integrated quasi-millimeter wave transmitter MMIC using 3D-MMIC technology

Yamaguchi, Y., Kaho, T., Uehara, K., Nagamine, S., Toriyama, Y., Shirosaki, T. & Taniguchi, T., 2007, 2007 Asia-Pacific Microwave Conference, APMC. 4555130

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Monolithic microwave integrated circuits
Millimeter waves
Transmitters
Field effect transistors
Power control
6 Citations (Scopus)

A highly integrated X-band frequency quadrupler MMIC using 3D-MMIC technology

Yamaguchi, Y., Kaho, T. & Uehara, K., 2007, Proceedings of the 2007 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2007. p. 757-760 4 p. 4266541

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Monolithic microwave integrated circuits
Frequency bands
Notch filters
Integrated circuits
Energy dissipation
1 Citation (Scopus)

An autonomous adaptive base station that supports multiple wireless network systems

Akabane, K., Shiba, H., Matsui, M. & Uehara, K., 2007, 2007 2nd IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks. p. 85-88 4 p. 4221480

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Base stations
Wireless networks
Telecommunication traffic
Telecommunication links
Hardware
27 Citations (Scopus)

A novel cooperative sensing technique for cognitive radio

Matsui, M., Shiba, H., Akabane, K. & Uehara, K., 2007, 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07. 4394725

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Radio stations
Radio waves
Cognitive radio
Computer simulation
5 Citations (Scopus)

Broadband low noise amplifier with high linearity for software-defined radios

Kawashima, M., Yamaguchi, Y., Nishikawa, K. & Uehara, K., 2007, European Microwave Week 2007 Conference Proceedings, EUMIC 2007 - 10th European Conference on Wireless Technology, ECWT 2007. p. 323-326 4 p. 4404012

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Broadband amplifiers
Radio receivers
Low noise amplifiers
radio
Networks (circuits)
4 Citations (Scopus)

Broadband low noise amplifier with high linearity for software-defined radios

Kawashima, M., Yamaguchi, Y., Nishikawa, K. & Uehara, K., 2007, European Microwave Week 2007 Conference Proceedings, EuMW 2007 - 2nd European Microwave Integrated Circuits Conference, EuMIC 2007. p. 243-246 4 p. 4412694

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Broadband amplifiers
Radio receivers
Low noise amplifiers
radio
Networks (circuits)
9 Citations (Scopus)

Miniaturized multilayer inductors on GaAs three-dimensional MMIC

Kaho, T., Sasaki, M., Yamaguchi, Y., Nishikawa, K. & Uehara, K., 2007, 2007 Korea-Japan Microwave Conference, KJMW2007, Technical Digest 2007. p. 149-152 4 p. 4402262

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Monolithic microwave integrated circuits
Multilayers
performance
Inductance
Millimeter waves
2005
2 Citations (Scopus)

Low propagation loss of atomically-flat surface AlN with low dislocation density for 5-GHz band SAW devices

Uehara, K., Aota, Y., Kameda, S., Nakase, H. & Tsubouchi, K., 2005, 2005 IEEE Ultrasonics Symposium. Vol. 1. p. 455-458 4 p. 1602891

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Aluminum nitride
Metallorganic chemical vapor deposition
Transmission electron microscopy
Epitaxial films
Sapphire
5 Citations (Scopus)

Performance evaluation of reconfigurable processor for SDR mobile terminals and SDR base station using autonomous adaptive control technology

Akabane, K., Shiba, H., Matsui, M., Umehira, M. & Uehara, K., 2005, 2005 Fifth International Conference on Information, Communications and Signal Processing. Vol. 2005. p. 148-152 5 p. 1689023

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Base stations
Local area networks
Communication systems
Electric power utilization
Systems analysis
2003
2 Citations (Scopus)

Proposal and evaluation of security schemes for software-defined radio

Shiba, H., Uehara, K. & Araki, K., 2003, PIMRC2003 - 14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, Proceedings. Vol. 1. p. 114-118 5 p. 1264243

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Radio systems
Electronic document identification systems
Hardware
2002
1 Citation (Scopus)

Design and performance evaluation of software defined radio prototype for PHS and IEEE802.11 wireless LAN

Uehara, K., Shiba, H., Shono, T., Shirato, Y., Yoshioka, H., Nakatsugawa, M., Kubota, S. & Umehira, M., 2002, 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2002. Vol. 1. p. 452-457 6 p. 1046742

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Local area networks
Throughput
Bandwidth
Processing
Experiments
2001
2 Citations (Scopus)

Design and evaluation of software radio program on multiprocessor architecture platform for full-duplex real-time communication

Uehara, K., Suzuki, Y., Shiba, H., Tanaka, H., Asai, Y., Shono, T. & Kubota, S., 2001, IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC. Vol. 2.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Software radio
Communication
Processing
Application programming interfaces (API)
Program processors
2000
7 Citations (Scopus)

Design of software radio for cellular communication systems and wireless LANs

Uehara, K., Tanaka, H., Shiba, H., Suzuki, Y., Nakatsugawa, M., Shirato, Y. & Kubota, S., 2000, IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC. Vol. 1. p. 474-478 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Cellular radio systems
Software radio
Local area networks
Program processors
Communication systems
1998

Time domain analysis of small Multi-Sector Monopole Yagi-Uda Array Antenna mounted on a finite ground plane using FDTD method

Maruyama, T., Uehara, K., Hori, T. & Kagoshima, K., 1998, Annual Review of Progress in Applied Computational Electromagnetics. Anon (ed.). Applied Computational Electromagnetics Soc, Vol. 1. p. 66-72 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Time domain analysis
Antenna grounds
Antenna arrays
Antennas
Radiation