Committee |
Date Time |
Place |
Paper Title / Authors |
Abstract |
Paper # |
NLP |
2015-05-19 10:25 |
Aomori |
Yu-sa Asamushi |
A Method for Determining Parameter Values of the Cochlea Reflectionless Transmission-Line Model Takemori Orima, Yoshihiko Horio (Tokyo Denki Univ.), Tohru Kohda (Kyushu Univ.) NLP2015-35 |
Cochlea models are good candidates for a high-performance frequency analyzer. The passive transmission-line model propos... [more] |
NLP2015-35 pp.45-50 |
SRW |
2013-08-19 14:15 |
Tokyo |
Shibaura Institute of Technology |
Separable Property for time and frequency synchronization in communications Yutaka Jitsumatsu, Tohru Kohda (Kyushu Univ.), Kazuyuki Aihara (Univ. of Tokyo) SRW2013-25 |
[more] |
SRW2013-25 pp.27-31 |
NLP |
2012-03-27 13:25 |
Nagasaki |
Fukue Cultural Hall |
Experimental Verification of the output bit-sequences from the A/D Converters based on the Scale-Adjusted β-Map Mitsuhiro Nakamura, Yoshihiko Horio (Tokyo Denki Univ.), Tohru Kohda (Kyushu Univ.), Kazuyuki Aihara (Univ. of Tokyo.) NLP2011-142 |
A β-encoder has exponential bit-rate accuracy, and robustness for circuit parameter deviations and noise. Then, the β-ma... [more] |
NLP2011-142 pp.7-10 |
NLP |
2011-11-09 18:10 |
Okinawa |
Miyako Island Marine Terminal |
Sequences generated by chaos and optimum Sequences for asynchronous CDMA system. Naoya Maeda, Yutaka Jitsumatsu, Tohru Kohda (Kyushu Univ.) NLP2011-108 |
Pseudorandom numbers generated from chaos are applied to spread spectrum communications.
Kohda and Fujisaki showed that... [more] |
NLP2011-108 pp.91-96 |
ISEC, IT, WBS |
2011-03-04 11:15 |
Osaka |
Osaka University |
Performance evaluation of MC-CDMA system which permits time and frequency offsets Tatsuma Kuwazaki, Tohru Kohda, Yutaka Jitsumatsu (Kyushu Univ.) IT2010-109 ISEC2010-113 WBS2010-88 |
In code division multiple access (CDMA) systems, spreading code is introduced as the third axis in addition
to the time... [more] |
IT2010-109 ISEC2010-113 WBS2010-88 pp.271-276 |
CAS |
2011-01-26 09:00 |
Kumamoto |
Kumamoto University |
Optimization of spreading code for bandlimited CDMA with fractional time delays Naoya Maeda, Yutaka Jitsumatsu, Tohru Kohda (Kyushu Univ.) CAS2010-95 |
The performance of asynchronous CDMA systems can be measured by
total square asynchronous correlations (TSAC). Ulukus a... [more] |
CAS2010-95 pp.61-66 |
NLP, CAS |
2010-08-02 15:10 |
Tokushima |
Naruto University of Education |
Circuit Implementation of an A/D Converter Based on the Scale-Adjusted β-Map Using a Discrete-Time Integrator Yoshihiko Horio (Tokyo Denki Univ.), Tohru Kohda (Kyushu Univ.), Kazuyuki Aihara (Univ. of Tokyo.) CAS2010-43 NLP2010-59 |
The beta-converter is robust against
errors in the quantizer threshold value like the
Sigma-Delta-type converters, and... [more] |
CAS2010-43 NLP2010-59 pp.55-60 |
NC, NLP, IPSJ-BIO [detail] |
2010-06-19 16:00 |
Okinawa |
Ryukyu-daigaku-gozyu-syunen-kinenn-kaikan |
Experimental Verifications of an A/D Converter based on the Scale-Adjusted β-Map with Discrete Circuit Elements Mitsuhiro Nakamura, Yoshihiko Horio (Tokyo Denki Univ.), Tohru Kohda (Kyushu Univ.), Kazuyuki Aihara (Univ. of Tokyo.) NLP2010-25 NC2010-25 |
A β-encoder was proposed based on the β-expansion, which is an expansion of a real number with radix of β. The β-encoder... [more] |
NLP2010-25 NC2010-25 pp.215-219 |
IT |
2010-05-21 10:30 |
Tokushima |
the University of Tokushima |
Associative memory in a neural network with uctuation Tohru Kohda, Yutaka Jitsumatsu, Naoto Maejima (Kyushu Univ.) IT2010-1 |
[more] |
IT2010-1 pp.1-5 |
IT, ISEC, WBS |
2010-03-05 10:50 |
Nagano |
Nagano-Engineering Campus, Shinshu University |
Discussion on a self-calibrated pipeline A/D converter. Tohru Kohda, Masatora Ogata (Kyushu Univ.) IT2009-119 ISEC2009-127 WBS2009-98 |
A class of pipelined A/D converters in one of the A/D converter has recently been proposed. We study pipeline A/D conver... [more] |
IT2009-119 ISEC2009-127 WBS2009-98 pp.313-318 |
IT, ISEC, WBS |
2010-03-05 11:15 |
Nagano |
Nagano-Engineering Campus, Shinshu University |
The quantized error of AD/DA conversion using beta-expansion Tohru Kohda, Yuuki Fukae (Kyushu Univ.) IT2009-120 ISEC2009-128 WBS2009-99 |
The pulse code modulation (PCM), which is a quantization scheme for analog-to-digital (A/D) conversion, is highly precis... [more] |
IT2009-120 ISEC2009-128 WBS2009-99 pp.319-324 |
IT, ISEC, WBS |
2010-03-05 11:40 |
Nagano |
Nagano-Engineering Campus, Shinshu University |
Frequency estimator using Newton method Tohru Kohda, Kohnosuke Ogiwara (Kyushu Univ.) IT2009-121 ISEC2009-129 WBS2009-100 |
We propose a method for estimating frequency and phase of an incoming wave using the Newton method.An arrival wave is mu... [more] |
IT2009-121 ISEC2009-129 WBS2009-100 pp.325-329 |
WBS, IT, ISEC |
2009-03-09 09:00 |
Hokkaido |
Hakodate Mirai Univ. |
Spectrum spreading sequences generated by chaotic dynamics and its correlational properties Tohru Kohda, Takao Une, Yuichiro Koura (Kyushu Univ.) IT2008-57 ISEC2008-115 WBS2008-70 |
The performance of code division multiple access (CDMA) system
largely depends on the SS codes.
Many methods of genera... [more] |
IT2008-57 ISEC2008-115 WBS2008-70 pp.85-90 |
WBS, IT, ISEC |
2009-03-09 09:25 |
Hokkaido |
Hakodate Mirai Univ. |
Markovian Coded Gaussian Filter with its application to Filterbanks Tohru Kohda, Yutaka Jitsumatsu, Tatsuma Kuwazaki, Kenjiro Fujino (Kyushu Univ.) IT2008-58 ISEC2008-116 WBS2008-71 |
In code division multiple access (CDMA) systems, spreading code is introduced as the third axis in addition to the time ... [more] |
IT2008-58 ISEC2008-116 WBS2008-71 pp.91-98 |
NLP |
2008-12-10 10:45 |
Ishikawa |
|
[Special Talk]
Department of Comuter Science and Communication Eng.
-- Discrete Chaos Theory and its Applications to CDMA Communications -- Tohru Kohda (kyushu Univ.) NLP2008-82 |
[more] |
NLP2008-82 pp.63-68 |
IT, ISEC, WBS |
2007-03-15 16:30 |
Gunma |
Gunma Univ. (Kiryu Campus) |
Reduction of Energy Function by Bit Flipping for Multi-User Detection Ryuichi Hane, Yutaka Jitsumatsu, Tohru Kohda (Kyushu Univ) |
In CDMA communications, both decorrelator and MMSE do not achieve the minimum bit error rate(BER).because hard decision... [more] |
IT2006-82 ISEC2006-137 WBS2006-79 pp.123-128 |
WBS, IT, ISEC |
2006-03-16 11:10 |
Aichi |
Nagoya Univ. |
Cross Correlation Matrices for Multiuser Chip-Asynchronous DS/CDMA systems Yutaka Jitsumatsu, Muhammad Tahir Abbas khan, Tohru Kohda (Kyushu Univ.) |
Bit error rate (BER) of multiuser detection (MUD) receivers can be measured by the cross correlation matrix whose elemen... [more] |
IT2005-91 ISEC2005-148 WBS2005-105 pp.159-163 |
IT, WBS, ISEC |
2005-03-18 10:20 |
Kyoto |
Kyoto Univ. |
Acquisition of Markovian SS Codes in Chip-Asynchronous DS/CDMA Sytems Yutaka Jitsumatsu, Tohru Kohda (Kyushu Univ.) |
G. Mazzini et al. showed that Spread Spectrum (SS) codes with Markovity give lower bit error rate (BER) than the conven... [more] |
IT2004-77 ISEC2004-133 WBS2004-192 pp.43-47 |
IT, WBS, ISEC |
2005-03-18 10:45 |
Kyoto |
Kyoto Univ. |
Code Acquisition in Asynchronous DS/CDMA Systems M. Tahir Abbas Khan (Kyushu Univ.), Nobuoki Eshima (Oita Univ.), Yutaka Jitsumatsu, Tohru Kohda (Kyushu Univ.) |
[more] |
IT2004-76 ISEC2004-132 WBS2004-191 pp.37-41 |