Hiroshi TANIMOTO


Power Reduction of Variable Wordlength OFDM Receiver in Time-Varying Fading Channels by Monitoring Subcarrier SNRs
Shingo YOSHIZAWA Daichi SASAKI Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2016/01/01
Vol. E99-A  No. 1  pp. 330-337
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
wireless communicationvariable wordlengthOFDMdigital signal processing circuits
 Summary | Full Text:PDF(2.3MB)

VLSI Implementation of an Interference Canceller Using Dual-Frame Processing for OFDM-IDMA Systems
Shingo YOSHIZAWA Mai NOZAKI Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/03/01
Vol. E98-A  No. 3  pp. 811-819
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
OFDM-IDMAinterference cancellerVLSI architecture
 Summary | Full Text:PDF(2MB)

Exact Design of RC Polyphase Filters and Related Issues
Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/02/01
Vol. E96-A  No. 2  pp. 402-414
Type of Manuscript:  INVITED PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
RC polyphase filtersexact transfer function designelement value designcoefficient matchingcascade synthesisButterworth responseequal ripple response
 Summary | Full Text:PDF(790.9KB)

Design of 1 V Operating Fully Differential OTA Using NMOS Inverters in 0.18 µm CMOS Technology
Atsushi TANAKA Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/06/01
Vol. E92-C  No. 6  pp. 822-827
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
low power supply voltagelarge output swingfully differential OTANMOS inverters
 Summary | Full Text:PDF(595.1KB)

A Very Wideband Active RC Polyphase Filter with Minimum Element Value Spread Using Fully Balanced OTA Based on CMOS Inverters
Keishi KOMORIYAMA Makoto YASHIKI Eiichi YOSHIDA Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/06/01
Vol. E91-C  No. 6  pp. 879-886
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
active RC polyphase filterfully differential OTACMOS inverterwidebandelement value spread
 Summary | Full Text:PDF(1.2MB)

Transfer Function Preserving Transformations on Equal-Ripple RC Polyphase Filters for Reducing Design Efforts
Hiroaki TANABE Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/02/01
Vol. E90-A  No. 2  pp. 333-338
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
RC polyphase filterequal rippletransfer function preserving transformationelement value spread
 Summary | Full Text:PDF(355.9KB)

Design Considerations for RC Polyphase Filters with Simultaneously Equal Ripple Both in Stopband and Passband
Hiroaki TANABE Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/02/01
Vol. E89-A  No. 2  pp. 461-464
Type of Manuscript:  Special Section LETTER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
RC polyphase filterequal rippleelement value designimage rejectionanalog complex coefficient filters
 Summary | Full Text:PDF(271.1KB)

Nonlinear Analysis of Bipolar Harmonic Mixer for Direct Conversion Receivers
Hiroshi TANIMOTO Ryuta ITO Takafumi YAMAJI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/06/01
Vol. E88-C  No. 6  pp. 1203-1211
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit and Device Technologies)
Category: RF
Keyword: 
harmonic mixerBHMIXtheoretical analysisdown conversion mixerconversion gainIIP3IIP2self-mixingdc offsetnoise analysiscyclostationary noise
 Summary | Full Text:PDF(529.9KB)

FOREWORD
Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/06/01
Vol. E86-C  No. 6  pp. 1007-1008
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(36.9KB)

A Low Offset 1.9-GHz Direct Conversion Receiver IC with Spurious Free Dynamic Range of over 67 dB
Shoji OTAKA Takafumi YAMAJI Ryuichi FUJIMOTO Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/02/01
Vol. E84-A  No. 2  pp. 513-519
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques Supporting the System LSI Era)
Category: 
Keyword: 
direct conversion receiverdouble balanced mixervariable gain amplifieron-chip balun90 phase-shifter
 Summary | Full Text:PDF(1MB)

High-Frequency Device-Modeling Techniques for RF-CMOS Circuits
Ryuichi FUJIMOTO Osamu WATANABE Fumie FUJII Hideyuki KAWAKITA Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/02/01
Vol. E84-A  No. 2  pp. 520-528
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques Supporting the System LSI Era)
Category: 
Keyword: 
device modelmodel parameterscalinggeometric parameterprocess parameter
 Summary | Full Text:PDF(1.2MB)

A 2-Vpp Linear Input-Range Fully Balanced CMOS Transconductor and Its Application to a 2.5-V 2.5-MHz Gm-C LPF
Tetsuro ITAKURA Takashi UENO Hiroshi TANIMOTO Tadashi ARAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/11/25
Vol. E83-A  No. 11  pp. 2295-2302
Type of Manuscript:  PAPER
Category: Analog Signal Processing
Keyword: 
analog signal processingintegrated electronicsfully balanced CMOS transconductorcommon-mode rejection ratio
 Summary | Full Text:PDF(2.1MB)

Broadband and Flexible Receiver Architecture for Software Defined Radio Terminal Using Direct Conversion and Low-IF Principle
Hiroshi TSURUMI Hiroshi YOSHIDA Shoji OTAKA Hiroshi TANIMOTO Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/06/25
Vol. E83-B  No. 6  pp. 1246-1253
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio and Its Technologies)
Category: 
Keyword: 
software defined radiodirect conversionlow-IFchannel selectionimage rejection
 Summary | Full Text:PDF(1.5MB)

A Digital-to-RF Converter Architecture Suitable for a Digital-to-RF Direct-Conversion Software Defined Radio Transmitter
Takafumi YAMAJI Akira YASUDA Hiroshi TANIMOTO Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/06/25
Vol. E83-B  No. 6  pp. 1254-1260
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio and Its Technologies)
Category: 
Keyword: 
DACdigital-to-RF direct-conversionsoftware defined radioΔΣ modulation
 Summary | Full Text:PDF(884.5KB)

System-Level Compensation Approach to Overcome Signal Saturation, DC Offset, and 2nd-Order Nonlinear Distortion in Linear Direct Conversion Receiver
Hiroshi TSURUMI Miyuki SOEYA Hiroshi YOSHIDA Takafumi YAMAJI Hiroshi TANIMOTO Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/05/25
Vol. E82-C  No. 5  pp. 708-716
Type of Manuscript:  Special Section PAPER (Special Issue on Low Distortion Technology for Microwave Devices and Circuits)
Category: 
Keyword: 
direct conversion receiverlinear modulation schemeRF stage gain controlinitial burst acquisitionDC offset canceler2nd-order intermodulation distortion
 Summary | Full Text:PDF(791.5KB)

A 1.9-GHz Direct Conversion Transmitter IC with Low Power On-Chip Frequency Doubler
Shoji OTAKA Ryuichi FUJIMOTO Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/02/25
Vol. E82-A  No. 2  pp. 313-319
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
frequency doublerquadrature modulatorvariable attenuatortransmitterPHS(Personal Handy-Phone System)90phase-shifterECL-EXOR
 Summary | Full Text:PDF(723.3KB)

Design of Fully Balanced Analog Systems Based on Ordinary and/or Modified Single-Ended Opamps
Zdzis taw CZARNUL Tetsuro ITAKURA Noriaki DOBASHI Takashi UENO Tetsuya IIDA Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/02/25
Vol. E82-A  No. 2  pp. 256-270
Type of Manuscript:  INVITED PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
fully balanced systemanalog circuitsintegrated circuitfilterintegratoramplifier
 Summary | Full Text:PDF(1.9MB)

FOREWORD
Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/02/25
Vol. E82-A  No. 2  pp. 255-255
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(105.6KB)

A 1. 5 GHz CMOS Low Noise Amplifier
Ryuichi FUJIMOTO Shoji OTAKA Hiroshi IWAI Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/03/25
Vol. E81-A  No. 3  pp. 382-388
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 10th Karuizawa Workshop on Circuits and Systems)
Category: 
Keyword: 
low noise amplifierCMOS technologyshort channelinductorhigh frequency circuit
 Summary | Full Text:PDF(655.6KB)

Separation of Phase Noise from Amplitude Noise in Oscillator Simulation
Makiko OKUMURA Hiroshi TANIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/08/25
Vol. E80-A  No. 8  pp. 1525-1528
Type of Manuscript:  LETTER
Category: Modeling and Simulation
Keyword: 
circuit simulationoscillatorperiodic time-varying circuitphase noise
 Summary | Full Text:PDF(220.5KB)

An Adder-Free Method for a Small Size π/4 Shift QPSK Signal Generator
Akira YASUDA Hiroshi TANIMOTO Chikau TAKAHASHI Akira YAMAGUCHI Masayuki KOIZUMI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/02/25
Vol. E80-A  No. 2  pp. 291-295
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques for System-on-Chip Integration)
Category: 
Keyword: 
analog circuits and signal processingQPSK signal generatordelta-sigma modulatorintergrated electronics
 Summary | Full Text:PDF(498.8KB)

1.9 GHz Si Direct Conversion Receiver IC for QPSK Modulation Systems
Chikau TAKAHASHI Ryuichi FUJIMOTO Satoshi ARAI Tetsuro ITAKURA Takashi UENO Hiroshi TSURUMI Hiroshi TANIMOTO Shuji WATANABE Kenji HIRAKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/05/25
Vol. E79-C  No. 5  pp. 644-649
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave Devices for Mobile Communications)
Category: Active Devices
Keyword: 
direct conversion receiver2nd-order distortionQPSK
 Summary | Full Text:PDF(640.6KB)

Design Study on RF Stage for Miniature PHS Terminal
Hiroshi TSURUMI Tadahiko MAEDA Hiroshi TANIMOTO Yasuo SUZUKI Masayuki SAITO Kunio YOSHIHARA Kenji ISHIDA Naotaka UCHITOMI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/05/25
Vol. E79-C  No. 5  pp. 629-635
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave Devices for Mobile Communications)
Category: Active Devices
Keyword: 
direct conversion, personal handy phone systemRF functional circuit modulebump interconnection technique
 Summary | Full Text:PDF(852.7KB)

FOREWORD
Hiroshi TANIMOTO Hisashi YAMADA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/03/25
Vol. E79-A  No. 3  pp. 273-274
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(123.8KB)

Design Considerations for High Frequency Active Bandpass Filters
Mikio KOYAMA Hiroshi TANIMOTO Satoshi MIZOGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/02/25
Vol. E76-A  No. 2  pp. 164-173
Type of Manuscript:  Special Section PAPER (Special Section on High-Speed Analog Circuits and Signal Processing)
Category: 
Keyword: 
integrated electronicselectronic circuitstransconductor-capacitor filterhigh frequencyanalog signal processing
 Summary | Full Text:PDF(762.7KB)