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Search Results: Conference Papers
 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 132件中 1~20件目  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
OCS, OFT
(Joint)
2010-08-26
16:30
Hokkaido Asahikawa Tokiwa Shimin Hall A Study on Margin Design of Optical Wireless Train Communication System Based on Results of Rain and Glass Attenuation Experiments
Min He, Shinichiro Haruyama, Masao Nakagawa, Tomoaki Ohtsuki, Hideki Urabe (Keio Univ.), Hiroshi Matsubara (RTRI) OCS2010-41
Recently, high speed communication system between train and ground has been developed. However, the data rate still cann... [more] OCS2010-41
pp.31-36
IN, RCS
(Joint)
2010-04-27
13:50
Tokyo Kikai-Shinko-Kaikan Bldg. Theoretical Analysis of Transmit and Recieve Weight selection in Vector Coding with Channel Estimation Error and Feedback Delay
Kyouhei Takano, Koichi Adachi, Tomoaki Ohtsuki, Masao Nakagawa (Keio Univ.) RCS2010-13
Vector Coding (VC) is a transmission scheme that can obtain path diversity gain while orthogonalizing receive signals. I... [more] RCS2010-13
pp.73-78
IN, RCS
(Joint)
2010-04-27
14:30
Tokyo Kikai-Shinko-Kaikan Bldg. PAPR Reduction of TD-SCDMA Using Joint Transmission Technique
Norharyati Binti Harum, Tomoaki Ohtsuki, Masao Nakagawa (Keio Univ.) RCS2010-14
Current downlink TD-SCDMA system uses Joint Detection (JD) technique to reduce interference. However, the technique need... [more] RCS2010-14
pp.79-84
IN, RCS
(Joint)
2010-04-27
14:55
Tokyo Kikai-Shinko-Kaikan Bldg. Subcarrier-Pairing Scheme for Low BER and PAPR In OFDM-Relay System
Koki Yuda, Tomoaki Ohtsuki, Masao Nakagawa (Keio Univ.) RCS2010-15
 [more] RCS2010-15
pp.85-89
IN, RCS
(Joint)
2010-04-27
15:20
Tokyo Kikai-Shinko-Kaikan Bldg. A Study on the User Allocation in IFDMA
Yuichi Kazama, Koichi Adachi, Tomoaki Ohtsuki, Masao Nakagawa (Keio Univ.) RCS2010-16
Single-carrier frequency division multiple access (SC-FDMA) will be adopted in the uplink of the future wireless communi... [more] RCS2010-16
pp.91-96
IN, RCS
(Joint)
2010-04-27
15:45
Tokyo Kikai-Shinko-Kaikan Bldg. Performance Improvement of DDCE for IFDMA with Phase Rotation
Kazunori Yamamoto, Koichi Adachi, Tomoaki Ohtsuki, Masao Nakagawa (Keio Univ.) RCS2010-17
Single-carrier frequency-division multiple-access (SC-FDMA), which can multiplex multiple users orthogonally by allocati... [more] RCS2010-17
pp.97-102
PN 2010-03-09
15:30
Okinawa Ohama Nobumoto Memorial Hall Visible-Light Positioning System with High Speed/Low Speed Image Sensor
Masahiro Arai, Toshiya Tanaka, Shuji Suzuki, Shinichiro Haruyama, Masao Nakagawa (Keio Univ.) PN2009-102
This paper proposes a new positioning method using visible light communication technology. The white LEDs and two types ... [more] PN2009-102
pp.91-96
RCS, AN, MoNA, SR
(Joint)
2010-03-03
09:20
Kanagawa YRP Application of Iterative Signal Processing to MC-CDMA with Frequency Domain Phase Rotation
Koichi Adachi (Keio Univ.), Fumiyuki Adachi (Tohoku Univ.), Masao Nakagawa (Keio Univ.) RCS2009-258
 [more] RCS2009-258
pp.5-10
RCS, AN, MoNA, SR
(Joint)
2010-03-04
10:50
Kanagawa YRP Analysis for Transmit Power Control Based on Modulation Identification
Koji Mochizuki, Osamu Takyu, Yohtaro Umeda (Tokyo Univ. of science.), Takeo Fujii (Univ. of Electro-Comm.), Masao Nakagawa (Keio Univ.) SR2009-104
In this paper, we consider the transmit power control (TPC) based on modulation identification. In the considered TPC, t... [more] SR2009-104
pp.91-97
RCS, AN, MoNA, SR
(Joint)
2010-03-04
14:00
Kanagawa YRP A Study on Available Bnad of Asynchronous OFDM under Cognitive Radio
Tomoyuki Shirakawa (Keio Univ.), Osamu Takyu (Tokyo Univ. of Science.), Takeo Fujii (Univ. of Electro-Comm.), Tomoaki Ohtsuki, Masao Nakagawa (Keio Univ.) SR2009-111
 [more] SR2009-111
pp.137-142
SIP, CAS, CS 2010-03-01
11:30
Okinawa Hotel Breeze Bay Marina, Miyakojima Design and Analysis of Speed-Enhancing Circuit for Visible Light Communication
Yusuke Shimogaki, Yohtaro Umeda, Osamu Takyu (Tokyo Univ. of Science), Masao Nakagawa (Keio Univ.) CAS2009-94 SIP2009-139 CS2009-89
Recently, Visible Light Communication that communicates by modulating light of illumination attracts much attention. It ... [more] CAS2009-94 SIP2009-139 CS2009-89
pp.93-98
CS, OCS
(Joint)
2010-01-28
17:25
Yamaguchi Kaikyo Messe Shimonoseki A Study on High-Speed Tracking in Optical Wireless Train Communication System
Shoichi Ishikawa, Masato Hiruta, Masao Nakagawa, Hideki Urabe, Shinichiro Haruyama (Keio Univ.), Hiroshi Matsubara (RTRI) OCS2009-109
A rising demand of the broadband communication in train needs more faster data communication method than wireless LAN. W... [more] OCS2009-109
pp.55-60
SR 2010-01-22
10:15
Tokyo Univ. of Electro-Communications False Alarm and Miss Detection in Spectrum Sensing with Nonlinear Front end
Takeru Matsuki, Yohtaro Umeda, Osamu Takyu (Tokyo Univ. of Science), Takeo Fujii (Univ. of Electro-Comm.), Tomoaki Ohtsuki, Masao Nakagawa (Keio Univ.) SR2009-83
Cognitive radio is considered as the highly promising solution to the shortage problem of the frequency resource. A spec... [more] SR2009-83
pp.59-64
RCS, SIP 2010-01-22
15:30
Fukuoka Kyushu Univ. Iterative Interference Cancellation for Multi-code PR/MC-CDMA
Koichi Adachi, Masao Nakagawa (Keio Univ.) SIP2009-114 RCS2009-248
The transmission performance, e.g., bit error rate (BER) performance, of uplink transmission is severely degraded owing ... [more] SIP2009-114 RCS2009-248
pp.241-246
RCS, SAT
(Joint)
2009-12-18
14:30
Tokyo Kikai-Shinko-Kaikan Bldg. Performance Evaluation of Effect of Spectrum Flatness by Random Phase Rotation in IFDMA System
Takeo Yamasaki, Osamu Takyu (Tokyo Univ. of Science), Wei Li, Koichi Adachi (Keio Univ), Yohtaro Umeda (Tokyo Univ. of Science), Masao Nakagawa (Keio Univ) RCS2009-194
In this paper, a scheme for making the flat frequency spectrum of interleaved frequency division multiple access (IFDMA)... [more] RCS2009-194
pp.161-165
OFT, OCS, IEE-CMN, ITE-BCT
(Joint) [detail]
2009-11-26
16:00
Fukushima   A Study on Optical Wireless Train Communication System using Biaxial Control Mirror Actuator
Masato Hiruta, Shinichiro Haruyama, Masao Nakagawa (Keio Univ.), Norio Shibata (Freelance), Hiroshi Matsubara (RTRI), Hideki Urabe, Syoichi Ishikawa (Keio Univ.) OCS2009-88
In recent years, for the realization of the ubiquitous society,
the information infrastructure development has been inc... [more]
OCS2009-88
pp.33-38
OFT, OCS, IEE-CMN, ITE-BCT
(Joint) [detail]
2009-11-26
16:25
Fukushima   Control Technique of Optical Axis for Directional Optical Wireless Communication Terminal
Xin Lin (Nakagawa Lab., Inc.), Syoichi Ishikawa (Keio Univ.), Kazutoshi Hirohashi (Nakagawa Lab., Inc.), Shinichiro Haruyama, Masao Nakagawa (Keio Univ.) OCS2009-89
A compact infrared communication device with bidirectional directed transmission function is developed as a mobile termi... [more] OCS2009-89
pp.39-43
SR, AN, USN
(Joint)
2009-10-23
11:00
Miyagi Tohoku Univ. Performance of Cooperative HARQ with Relay Selection that Exploits Inter-relay Opportunistic Listening
Nandar Lynn (Keio Univ.), Osamu Takyu (Tokyo Univ. of Science), Koichi Adachi, Masao Nakagawa (Keio Univ.) SR2009-63 AN2009-33 USN2009-36
In this paper, we present a practically feasible cooperative HARQ with relay selection that exploits inter-relay transmi... [more] SR2009-63 AN2009-33 USN2009-36
pp.79-85(SR), pp.71-77(AN), pp.53-59(USN)
RCS 2009-08-04
10:30
Miyagi Tohoku Univ. Performance Analysis of CDTD-VC in a Distributed Antenna System
Kyouhei Takano, Yoshiyuki Takanashi, Daisuke Takeda, Koichi Adachi, Masao Nakagawa (Keio Univ.) RCS2009-96
Vector Coding(VC) is a transmission scheme which can obtain path diversity gain while multiplexing the transmitted signa... [more] RCS2009-96
pp.109-114
RCS 2009-08-04
10:55
Miyagi Tohoku Univ. A Study on Frequency Diversity and Multi-User Diversity in IFDMA
Yuichi Kazama, Akira Yamasaki, Koichi Adachi, Masao Nakagawa (Keio Univ.) RCS2009-97
Single-carrier frequency division multiple access (SC-FDMA) has been decided to be adopted in the uplink of the future w... [more] RCS2009-97
pp.115-120
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