Katsuhiko ARAKI


A Novel Adaptive Linearization Technique for a Balanced-Amplifier Array
Takana KAHO Yo YAMAGUCHI Tadao NAKAGAWA Katsuhiko ARAKI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/10/01
Vol. E89-C  No. 10  pp. 1448-1453
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
adaptive linearizationlinearizermulti-port amplifierpower amplifiersarray antenna
 Summary | Full Text:PDF(689.4KB)

Design and Performance Evaluation of IEEE 802.11a SDR Software Implemented on a Reconfigurable Processor
Kazunori AKABANE Hiroyuki SHIBA Munehiro MATSUI Kiyoshi KOBAYASHI Katsuhiko ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/11/01
Vol. E88-B  No. 11  pp. 4163-4169
Type of Manuscript:  Special Section PAPER (Special Section on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
software defined radioreconfigurable processorwireless LANIEEE 802.11a
 Summary | Full Text:PDF(1.9MB)

Spreading Code Assignment for Multicarrier CDMA System over Frequency-Selective Fading Channels
Takashi SHONO Tomoyuki YAMADA Kiyoshi KOBAYASHI Katsuhiko ARAKI Iwao SASASE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/12/01
Vol. E87-B  No. 12  pp. 3734-3746
Type of Manuscript:  PAPER
Category: Terrestrial Radio Communications
Keyword: 
multicarrier code division multiple access (MC-CDMA)inter-code interference (ICI)spreading code assignmentequal gain combining (EGC)orthogonality restoring combining (ORC)maximum ratio combining (MRC)broadband mobile communications
 Summary | Full Text:PDF(1.1MB)

Inter-Code Interference and Optimum Spreading Sequence in Frequency-Selective Rayleigh Fading Channels on Uplink MC-CDMA
Takashi SHONO Tomoyuki YAMADA Kiyoshi KOBAYASHI Katsuhiko ARAKI Iwao SASASE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/08/01
Vol. E87-A  No. 8  pp. 1981-1993
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: Signal Processing for Communications
Keyword: 
MC-CDMAOFDMinter-code interferencedesired-to-undesired signal power ratiospreading sequence
 Summary | Full Text:PDF(464.1KB)

A 0.9-2.6 GHz Broadband RF Front-End Chip-Set with a Direct Conversion Architecture
Munenari KAWASHIMA Tadao NAKAGAWA Hitoshi HAYASHI Kenjiro NISHIKAWA Katsuhiko ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/12/01
Vol. E85-B  No. 12  pp. 2732-2740
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
RF front-enddirect conversion architecturequadrature mixerlocal oscillatorlow-noise variable gain amplifier
 Summary | Full Text:PDF(830.2KB)

A Monolithic Linearizer Using an Even-Order-Distortion Controller for an S-Band High Power Amplifier
Takana KAHO Hiroshi OKAZAKI Tadao NAKAGAWA Katsuhiko ARAKI Kohji HORIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/12/01
Vol. E85-C  No. 12  pp. 1959-1966
Type of Manuscript:  Special Section PAPER (Special Issue on Low-Distortion,High-Power,High-Efficiency Active Device and Circuit Technology)
Category: 
Keyword: 
linearizeramplifierGaAs MMICsatellite communication
 Summary | Full Text:PDF(1.2MB)