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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 19 of 19  /   
Committee Date Time Place Paper Title / Authors Abstract Paper #
NLP 2015-05-19
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
SRW 2013-08-19
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
NLP 2012-03-27
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
NLP 2011-11-09
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]
ISEC, IT, WBS 2011-03-04
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
CAS 2011-01-26
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]
NLP, CAS 2010-08-02
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
NC, NLP, IPSJ-BIO [detail] 2010-06-19
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
IT 2010-05-21
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
IT, ISEC, WBS 2010-03-05
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
IT, ISEC, WBS 2010-03-05
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
IT, ISEC, WBS 2010-03-05
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
WBS, IT, ISEC 2009-03-09
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
WBS, IT, ISEC 2009-03-09
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
NLP 2008-12-10
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
IT, ISEC, WBS 2007-03-15
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
WBS, IT, ISEC 2006-03-16
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
IT, WBS, ISEC 2005-03-18
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
IT, WBS, ISEC 2005-03-18
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
 Results 1 - 19 of 19  /   
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