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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 24  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
RCS, NS
(Joint)
2018-12-21
16:10
Hiroshima Onomichi City Hall A Study on Power Allocation in Downlink Non-Orthogonal Multiple Access using Transmission Simulation
Ryu Kitagawa, Fumio Takahata (Waseda Univ.) RCS2018-240
The non-orthogonal multiple access (NOMA) would be one of key technologies in the 5-th generation mobile communications ... [more] RCS2018-240
pp.125-130
CS, CAS 2018-03-13
15:30
Fukuoka Nishijin Plaza, Kyushu University On Reduction of Calculation Complexity of Polar Codes over Fading Channels
Masaaki Ito, Fumio Takahata (Waseda Univ.) CAS2017-158 CS2017-112
Algorithms for improving performances of polar codes over fading channels have been proposed, but it seems to be a probl... [more] CAS2017-158 CS2017-112
pp.139-144
CS, CAS 2018-03-13
15:55
Fukuoka Nishijin Plaza, Kyushu University A Channel State Information Feedback Scheme for Multi-user MIMO using Guard Band Frequency Response extrapolated by Adaptive Filter
Futoshi Fukuda, Fumio Takahata (Waseda Univ.) CAS2017-159 CS2017-113
Several compression schemes of channel state information (CSI) for the downlink multi-user MIMO are proposed, in which a... [more] CAS2017-159 CS2017-113
pp.145-150
RCS, IT, SIP 2016-01-18
10:10
Osaka Kwansei Gakuin Univ. Osaka Umeda Campus Optimization of VP's in Downlink MU-MIMO NLP based on LR-THP
Kazuki Imamura, Fumio Takahata (Waseda Univ.) IT2015-53 SIP2015-67 RCS2015-285
 [more] IT2015-53 SIP2015-67 RCS2015-285
pp.31-36
RCS, IT, SIP 2016-01-19
11:25
Osaka Kwansei Gakuin Univ. Osaka Umeda Campus Performance Evaluation of An Adaptive Allocation Method of Scattered Pilots for Fading Variation
Takuro Yokoyama, Fumio Takahata (Waseda Univ.) IT2015-87 SIP2015-101 RCS2015-319
We propose an adaptive scattered pilot allocation method, in which the allocation is determined based on metric values o... [more] IT2015-87 SIP2015-101 RCS2015-319
pp.213-218
RCS, SR, SRW
(Joint)
2014-03-05
10:55
Tokyo Waseda Univ. An Adaptive Dual-mode DFCE with Scattered Pilots for Fading Condition
Sho Sumitani, Fumio Takahata (Waseda Univ.) RCS2013-378
In an application of a dual-mode decision feedback channel estimation to a COFDM transmission with scattered pilot symbo... [more] RCS2013-378
pp.437-442
RCS, SR, SRW
(Joint)
2014-03-05
16:10
Tokyo Waseda Univ. An application of Multiple Sphere Encoding to Downlink MU-MIMO VP
Shunsuke Sasaki, Fumio Takahata (Waseda Univ.) RCS2013-390
This paper proposes the computational complexity reduction technique for the Downlink Multi-User Multiple Input Multiple... [more] RCS2013-390
pp.505-510
RCS, SR, SRW
(Joint)
2013-02-27
09:20
Tokyo Waseda Univ. On MMSE receive antenna combining for downlink THP MU-MIMO
Hirotoshi Takahashi (Waseda Univ.), Hiromichi Tomeba, Takashi Onodera, Minoru Kubota (Sharp Corp.), Fumiaki Maehara, Fumio Takahata (Waseda Univ.) RCS2012-285
This paper proposes an MMSE receive antenna combining suitable for THP MU-MIMO, and shows that it can provide a better t... [more] RCS2012-285
pp.7-12
RCS, SR, SRW
(Joint)
2013-02-27
10:50
Tokyo Waseda Univ. A study of perturbation vector search for downlink MU-MIMO using Vector Perturbation
Masato Takada (Waseda Univ.), Hiromichi Tomeba, Takashi Onodera, Minoru Kubota (Sharp), Fumiaki Maehara, Fumio Takahata (Waseda Univ.) RCS2012-289
This paper proposes the computational complexity reduction technique for the downlink(DL) Multi-User Multiple Input Mult... [more] RCS2012-289
pp.31-36
CS, SIP, CAS 2011-03-03
13:50
Okinawa Ohhamanobumoto memorial hall (Ishigaki)( On Channel Estimation and Compensation in DFTS-OFDM using Scattered Pilot
Akihiko Sato, Fumio Takahata (Waseda Univ.) CAS2010-113 SIP2010-129 CS2010-83
Scattered pilots (SP) would be effective for the estimation and compensation of fast fading propagation paths. This pap... [more] CAS2010-113 SIP2010-129 CS2010-83
pp.67-72
CS, SIP, CAS 2011-03-04
10:00
Okinawa Ohhamanobumoto memorial hall (Ishigaki)( A Signal Detection Scheme using Log Likelihood Ratio in MIMO-OFDM-SDM System
Ryota Takahashi, Fumio Takahata (Waseda Univ.) CAS2010-145 SIP2010-161 CS2010-115
A MIMO-OFDM-SDM system, which provides good transmission quality irrespective of various conditions of propagation chann... [more] CAS2010-145 SIP2010-161 CS2010-115
pp.251-256
CS, SIP, CAS 2011-03-04
10:20
Okinawa Ohhamanobumoto memorial hall (Ishigaki)( A Dual-mode Channel Estimation Scheme using Log Likehood Ratio for COFDM Transmission
Koushin Suzuki, Fumio Takahata (Waseda Univ.) CAS2010-146 SIP2010-162 CS2010-116
Decision feedback channel estimation (DFCE) is one of the promising channel estimation schemes for OFDM transmission und... [more] CAS2010-146 SIP2010-162 CS2010-116
pp.257-261
CS, SIP, CAS 2011-03-04
12:10
Okinawa Ohhamanobumoto memorial hall (Ishigaki)( An Effect of Application of Sequential Channel Estimation to LDPC Decoding
Yu Sudou, Fumio Takahata (Waseda Univ) CAS2010-151 SIP2010-167 CS2010-121
In the decoding process of LDPC code, an accuracy of LLRs (Log Likelihood Ratio) affects strongly to BER (Bit Error Rate... [more] CAS2010-151 SIP2010-167 CS2010-121
pp.287-292
WBS, IT, ISEC 2009-03-10
09:25
Hokkaido Hakodate Mirai Univ. A BER floor suppression scheme of OFDM system with Overlap-FDE
Tetsuya Kobori, Fumio Takahata (Waseda Univ) IT2008-115 ISEC2008-173 WBS2008-128
An overlap-FDE has a capability of eliminating a guard interval(GI) in OFDM transmission. However it is possible in mult... [more] IT2008-115 ISEC2008-173 WBS2008-128
pp.469-474
WBS, IT, ISEC 2009-03-10
11:40
Hokkaido Hakodate Mirai Univ. Proposal of MIMO-SDM System considering Correlation of Channels
Tatsuhiko Yoshihara, Masayuki Yoshida, Fumiaki Maehara, Fumio Takahata (Waseda Univ.), Takashi Onodera (Sharp Corp.) IT2008-120 ISEC2008-178 WBS2008-133
A MIMO-OFDM-SDM system, which provides good transmission quality irrespective of various condition of propagation channe... [more] IT2008-120 ISEC2008-178 WBS2008-133
pp.501-506
RCS 2007-06-29
11:20
Aichi Toyohashi Uni. of Tech. A Study of Metric Calculation in Co-Channel Interference Environment
Akinori Taira, Mieko Kanmuri, Fumiaki Maehara, Fumio Takahata (Waseda Univ) RCS2007-21
Spectral efficiency improvement is demanded for next generation mobile
communication systems. Smaller cell design or fr... [more]
RCS2007-21
pp.61-66
RCS, SIP
(Joint)
2006-01-26
10:00
Fukuoka Kyusyu Univ. Application of time domain transmit power allocation employing TDD-based simple channel prediction to OFDM systems
Yuji Kamiya, Haruhito Yoshida, Fumiaki Maehara, Fumio Takahata (Waseda Univ.)
The transmission performance of the pilot assisted orthogonal frequency division multiplexing (OFDM) system is deteriora... [more] RCS2005-125
pp.7-12
RCS, SIP
(Joint)
2006-01-26
10:40
Fukuoka Kyusyu Univ. A Study on Frequency-domain Channel Estimation Scheme Employing RLS Algorithm for OFDM Transmission in the Presence of Guard Band
Yuji Ikeda, Haruhito Yoshida, Fumiaki Maehara, Fumio Takahata (Waseda Univ.)
 [more] RCS2005-126
pp.13-18
RCS, SIP
(Joint)
2006-01-26
11:00
Fukuoka Kyusyu Univ. A Study on Adaptive Control of Forgetting Factor for Decision Feedback Channel Estimation in COFDM Transmission
Haruhito Yoshida, Fumiaki Maehara, Fumio Takahata (Waseda Univ.)
Decision feedback channel estimation is one of the promising channel estimation schemes for orthogonal frequency divisio... [more] RCS2005-127
pp.19-24
RCS, SIP
(Joint)
2006-01-26
13:00
Fukuoka Kyusyu Univ. Effect of forward error correction on STTD-SC-FDE employing periodicspectrum
Tasuku Kuriyama, Haruhito Yoshida, Fumiaki Maehara, Fumio Takahata (Waseda Univ.)
In recent years, single-carrier modulation with frequency domain equalization (SC-FDE) has received a lot of interest be... [more] RCS2005-150
pp.155-160
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