Naoki KITA


A 24 mW 5.7 Gbps Dual Frequency Conversion Demodulator for Impulse Radio with the First Sidelobe
Kaoru KOHIRA Naoki KITAZAWA Hiroki ISHIKURO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/10/01
Vol. E99-C  No. 10  pp. 1164-1173
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: 
Keyword: 
clock recoveryimpulse radioUWBsidelobe
 Summary | Full Text:PDF(2.2MB)

Path Loss Model for Low Antenna Heights in Residential Areas at Middle VHF Band
Motoharu SASAKI Wataru YAMADA Naoki KITA Takatoshi SUGIYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/10/01
Vol. E97-B  No. 10  pp. 2093-2101
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Measurement and Design Techniques on Antennas, Propagation and Wireless Systems)
Category: 
Keyword: 
path loss modellow antenna heightmobile terminalresidential areaVHF band
 Summary | Full Text:PDF(7.4MB)

Path Loss Model with Low Antenna Height for Microwave Bands in Residential Areas
Motoharu SASAKI Wataru YAMADA Naoki KITA Takatoshi SUGIYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/07/01
Vol. E96-B  No. 7  pp. 1930-1944
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
path loss modellow antenna heightmobile terminalresidential areamicrowave band
 Summary | Full Text:PDF(3.3MB)

Plane-Wave and Vector-Rotation Approximation Technique for Reducing Computational Complexity to Simulate MIMO Propagation Channel Using Ray-Tracing
Wataru YAMADA Naoki KITA Takatoshi SUGIYAMA Toshio NOJIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/12/01
Vol. E92-B  No. 12  pp. 3850-3860
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MIMO propagation channel prediction techniqueray-tracing methodimaging algorithmsubstitution technique
 Summary | Full Text:PDF(1.6MB)

New Method for Evaluating Height Gain at Subscriber Station for Wireless Access Systems in Microwave Band
Naoki KITA Wataru YAMADA Akio SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/10/01
Vol. E90-B  No. 10  pp. 2903-2914
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
height gainpath lossmicrowave bandBWAgeometrical optics
 Summary | Full Text:PDF(3.7MB)

Wideband Characteristics of Demmel Condition Number for 22 MIMO-OFDM Channels
Naoki KITA Wataru YAMADA Akio SATO Shuta UWANO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/05/01
Vol. E87-B  No. 5  pp. 1270-1272
Type of Manuscript:  Special Section LETTER (Special Section on Mobile Multimedia Communications)
Category: 
Keyword: 
MIMO-OFDM channelDemmel condition numberindoor MIMO channelspatial multiplexing
 Summary | Full Text:PDF(283.9KB)

Polarization Switchable Microstrip Antenna Using PIN Diodes
Dongkeun JUNG Takeshi FUKUSAKO Naoki KITAMURA Nagahisa MITA Cheunsoo HA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/01/01
Vol. E87-B  No. 1  pp. 152-157
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
patch antennapolarization switchingPIN diodeslot couplingdiversity
 Summary | Full Text:PDF(869.9KB)

A Path Loss Model in Residential Areas Based on Measurement Studies Using a 5.2-GHz/2.2-GHz Dual Band Antenna
Naoki KITA Shuta UWANO Akio SATO Masahiro UMEHIRA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/03/01
Vol. E84-B  No. 3  pp. 368-376
Type of Manuscript:  Special Section PAPER (Special Issue on Innovative Mobile Communication Technologies at the Dawn of the 21st Century)
Category: 
Keyword: 
2.2 GHz5.2 GHz5.2-GHz/2.2-GHz dual band antennapath lossresidential areas
 Summary | Full Text:PDF(1.3MB)

PLL Frequency Synthesizer with Binary Phase Comparison
Shigeki OBOTE Yasuaki SUMI Naoki KITAI Yutaka FUKUI Yoshio ITOH 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/03/25
Vol. E83-A  No. 3  pp. 427-434
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 12th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
PLL frequency synthesizerbinary phase comparison
 Summary | Full Text:PDF(959.1KB)

Prescaler PLL Frequency Synthesizer with Multi-Programmable Divider
Yasuaki SUMI Shigeki OBOTE Naoki KITAI Hidekazu ISHII Ryousuke FURUHASHI Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/03/25
Vol. E83-A  No. 3  pp. 421-426
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 12th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
PLL frequency synthesizerprescalermulti-programmable divider(N+1/2) programmable divider
 Summary | Full Text:PDF(1.1MB)

Speedup of Frequency Switching Time in PLL Frequency Synthesizers Using a Target Frequency Detector
Shigeki OBOTE Yasuaki SUMI Naoki KITAI Kouichi SYOUBU Yutaka FUKUI Yoshio ITOH 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/03/25
Vol. E82-A  No. 3  pp. 436-441
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 11th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
PLL frequency synthesizertarget frequency detectorfast frequency switching
 Summary | Full Text:PDF(450.8KB)