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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 23  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
SRW, SeMI, CNR
(Joint)
2020-11-27
11:30
Online Online [Invited Lecture] Performance of Unlicensed Wireless Communication Systems under Multiple Periodic Burst Noise Environment
Kenta Fujisawa, Shinichi Miyamoto (Wakayama Univ.) SRW2020-37
With the increase of the demands for next generation wireless communication service, an efficient use of unlicensed spec... [more] SRW2020-37
pp.55-60
EA, ASJ-H, ASJ-AA 2018-07-25
13:40
Hokkaido Hokkaido Univ. Interference-free power spectral representations of periodic sounds and their application to VOCODERs
Hideki Kawahara (Wakayama Univ.), Masanori Morise (Univ. Yamanashi), Kanru Hua (Univ. Illinois) EA2018-23
We propose a method to calculate the spectral envelope of voiced sounds for VOCODER applications. In our previous techni... [more] EA2018-23
pp.135-140
PRMU, SP 2018-06-29
10:00
Nagano   Revisiting interference-free power spectral representations of periodic signals
Hideki Kawahara (Wakayama Univ.), Masanori Morise (Univ. Yamanashi), Kanru Hua (Univ. Illinois) PRMU2018-29 SP2018-9
We propose two algorithms to calculate interference-free power spectra of periodic signals. This set of algorithms is ou... [more] PRMU2018-29 SP2018-9
pp.41-46
MSS, NLP
(Joint)
2018-03-13
13:25
Osaka   Investigation on 1/f Fourier power spectrum and nature of the data
Tomomichi Nakamura (Univ. of Hyogo), Michael Small (Univ. of Western Australia), Toshihiro Tanizawa (Kochi National College of Tech.) NLP2017-106
We describe a problem with periodicity~(frequency) analysis by
the discrete Fourier transform~(DFT).
The DFT is the p... [more]
NLP2017-106
pp.25-29
RCS 2016-06-23
16:40
Okinawa Univ. of the Ryukyus [Invited Talk] Studies on Receive Diversity and MIMO receivers based on the antenna with periodically variable antenna pattern
Masato Saito (Ryukyu Univ.) RCS2016-74
In this talk, the author presents the studies conducted by the members of the author's laboratory on receive diversity a... [more] RCS2016-74
p.165
EMM, IT 2015-05-22
14:45
Kyoto Kyoto International Community House [Invited Talk] Complete Complementary Codes and Its Applications
Tetsuya Kojima (NIT, Tokyo College) IT2015-16 EMM2015-16
It is important to find spread spectrum sequences that have auto correlation with a single sharp peak and no cross corre... [more] IT2015-16 EMM2015-16
pp.87-92
NLP 2014-12-03
13:50
Tokyo Kyoto Univ. Tokyo Office Performance Analysis of Super Dense Multiple Access(SDMA) Communications Systems Using Almost Periodic Function Codes
Tomoya Naohara, Ken Umeno (Kyoto Univ.) NLP2014-101
We propose a new communications system that is different from what is using PN codes or chaotic codes. It is based on th... [more] NLP2014-101
pp.11-16
SP, ASJ-H 2014-10-24
09:00
Wakayama Nanki Shirahama Onsen Hotel Seamore [Invited Talk] Speech processing based on static representations of periodic signals
Hideki Kawahara (Wakayama Univ.)
Locally periodic signals, such as voiced sounds and sounds of musical instruments, play important roles in our everyday ... [more] SP2014-87
pp.65-70
CAS, SIP, MSS, VLD, SIS [detail] 2014-07-09
09:30
Hokkaido Hokkaido University A study on footstep detection in outdoor environment
Shota Tanaka, Akitoshi Itai (Chubu Univ.), Hiroshi Yasukawa (Aichi Prefectural Univ.) CAS2014-1 VLD2014-10 SIP2014-22 MSS2014-1 SIS2014-1
It is known that a footstep is useful tool to estimate a human state. Various surveillance systems using footstep are pr... [more] CAS2014-1 VLD2014-10 SIP2014-22 MSS2014-1 SIS2014-1
pp.1-5
CAS, SIP, MSS, VLD, SIS [detail] 2014-07-10
09:30
Hokkaido Hokkaido University Temporally static representation of group delay for periodic signals
Hideki Kawahara (Wakayama Univ.) CAS2014-21 VLD2014-30 SIP2014-42 MSS2014-21 SIS2014-21
Short term Fourier transform of periodic signals introduce periodic temporal variations in their Frequency domain repres... [more] CAS2014-21 VLD2014-30 SIP2014-42 MSS2014-21 SIS2014-21
pp.105-110
OPE, LQE, OCS 2012-10-25
11:15
Miyazaki   Laminated Polarizer With an Anti-Reflection Structure Using a Subwavelength Grating
Junji Yamauchi, Kazuya Yamahira, Yuu Wakabayashi, Hisamatsu Nakano (Hosei Univ.) OCS2012-46 OPE2012-97 LQE2012-63
An anti-reflection (AR) structure using a subwavelength grating (SWG) is analyzed by
the finite-difference time-domain... [more]
OCS2012-46 OPE2012-97 LQE2012-63
pp.31-36
EA 2012-07-19
13:30
Hokkaido Health Sci. Univ. of Hokkaido A stable representation of group delay for periodic signals
Hideki Kawahara (Wakayama Univ.), Masanori Morise (Ritsumei. Univ.), Ryuichi Nisimura, Toshio Irino (Wakayama Univ.) EA2012-45
Instantaneous frequency and group delay, which are defined as the temporal derivative and the frequency derivative of ph... [more] EA2012-45
pp.1-6
EMT, PN, LQE, OPE, MWP, EST, IEE-EMT [detail] 2012-01-26
09:30
Osaka Osaka Univ. Convention Center Analysis in Doubly Periodic Scattering System
Taishi Okita (Toyota Central R&D Labs., Inc.) PN2011-44 OPE2011-160 LQE2011-146 EST2011-94 MWP2011-62
We analytically study scattering problems on the basis of the mode expansion theory, when the metal screen perforated pe... [more] PN2011-44 OPE2011-160 LQE2011-146 EST2011-94 MWP2011-62
pp.79-84
OFT, OPE 2011-03-04
09:35
Tokyo Kikai-Shinko-Kaikan Bldg. Reflection Characteristics of Broadband Mirrors Using a Subwavelength Grating
Yuu Wakabayashi, Shunsuke Kimura, Junji Yamauchi, Hisamatsu Nakano (Hosei Univ.) OFT2010-64 OPE2010-168
Broadband mirrors using a subwavelength grating (SWG) are analyzed by the finite-difference time-domain method with the ... [more] OFT2010-64 OPE2010-168
pp.7-12
CAS 2011-01-26
09:25
Kumamoto Kumamoto University Aperiodic Correlation Properties of Pseudorandom Binary Sequences as Unipolar Codes -- Comparison of NFSR Orthogonal Sequences and Gold Sequences --
Shintaro Matsuo, Akio Tsuneda (Kumamoto Univ.) CAS2010-96
In asynchronous DS/CDMA communications and positioning systems based on spread-spectrum codes, aperiodic correlation fun... [more] CAS2010-96
pp.67-70
SP 2010-11-18
17:00
Aichi Aichi Prefectural Univ. Temporally static representation of phase related quantity for periodic signals
Hideki Kawahara (Wakayama Univ.), Masanori Morise (Ritsumeikan Univ.), Toshio Irino (Wakayama Univ.) SP2010-77
An averaged power spectrum, which is calculated from two power spectra using two time windows a half pitch-period apart,... [more] SP2010-77
pp.47-51
SP, NLC 2008-12-10
16:10
Tokyo Waseda Univ. Parameter optimization for a fundamental frequency extractor based on TANDEM-STRAIGHT
Hanae Itagaki, Masanori Morise, Ryuichi Nisimura, Toshio Irino, Hideki Kawahara (Wakayama Univ.) NLC2008-50 SP2008-105
Abstract A fundamental frequency extractor based on a temporally stable power spectral representation for peri-odic sign... [more] NLC2008-50 SP2008-105
pp.155-160
WBS 2008-10-10
09:00
Yamaguchi Yamaguchi Univ. [Poster Presentation] Properties of Multi-Dimensional Even-Shift Orthogonal Sequences
Yukari Tsuchiyama, Takahiro Matsumoto, Shinya Matsufuji (Yamaguchi Univ.) WBS2008-40
The even-shift orthogonal sequence (E-sequence) is a sequence, whose aperiodic auto-correlation function takes zero at a... [more] WBS2008-40
pp.59-62
WBS 2007-10-15
16:10
Hiroshima   Construction of multi-dimensional even-shift orthogonal sequences
Yukari Tsuchiyama, Takahiro Matsumoto, Shinya Matsufuji (Yamaguchi Univ.) WBS2007-38
The even-shift orthogonal sequence(E-sequence) is a binary sequence whose out-of-phase aperiodic auto-correlation functi... [more] WBS2007-38
pp.33-37
SP
Toyama Toyama Prefectural University A temporal and frequency interference-free power spectral representation of periodic signals -- Toward STRAIGHT spectral estimation without tunable component --
Hideki Kawahara, Masanori Morise, Toru Takahashi, Ryuichi Nisimura, Toshio Irino (Wakayama Univ.), Hideki Banno (Meijo Univ.) SP2007-26
A new spectral estimation procedure which does not have interferences due to periodicity both in the time and the freque... [more] SP2007-26
pp.13-18
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