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All Technical Committee Conferences  (Searched in: Recent 10 Years)

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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 17 of 17  /   
Committee Date Time Place Paper Title / Authors Abstract Paper #
WBS, ITS, RCC 2024-12-04
16:05
Kagoshima Kagoshima Prefectural Culture Center (Kagoshima, Online)
(Primary: On-site, Secondary: Online)
A study on diversity effect of phase rotated higher-order QAM
Shunya Tsunakawa, Masahiro Fujii (Utsunomiya Univ.) WBS2024-41 ITS2024-22 RCC2024-46
In this paper, we consider a method to obtain diversity effect without signal redundancy by adding phase rotation to nor... [more] WBS2024-41 ITS2024-22 RCC2024-46
pp.52-57
NS, IN, CS, NV
(Joint)
2024-09-06
11:45
Miyagi Tohoku University + Online (Miyagi) A study on diversity effect by phase rotated QAM in selective fading channel
Shunya Tsunakawa, Masahiro Fujii (Utsunomiya Univ.) CS2024-42
In this paper, we consider a method to obtain diversity effect without symbol redundancy by rotating symbol constellatio... [more] CS2024-42
pp.15-20
MW 2024-05-16
14:30
Osaka Osaka University Toyonaka Campus (Osaka, Online)
(Primary: On-site, Secondary: Online)
Improved image rejection with correction of I/Q amplitude and phase errors in an even harmonic quadrature mixer
Takaaki Michishita, Kousuke Ito, Masaomi Tsuru, Naoki Sakai, Kenji Itoh (KIT) MW2024-8
This paper describes improved image rejection with correction of I/Q amplitude and phase errors in an even harmonic quad... [more] MW2024-8
pp.1-6
PN 2022-03-02
09:50
Online Online (Online) Initial study of pseudo-phase noise-based symbol masked polarization-multiplexed M-QAM signal using a time-spreading encryption key
Keiji Shimada, Mizuki Inagaki, Takahiro Kodama (Kagawa Univ.) PN2021-70
In recent years, a common key cryptosystem for the physical layer has been introduced in digital signals to keep the dat... [more] PN2021-70
pp.92-97
OCS, CS
(Joint)
2022-01-14
11:00
Yamaguchi Conference room 204A・B at KDDI Ishin-hall (Yamaguchi, Online)
(Primary: On-site, Secondary: Online)
Study of the Amount of Mutual Information of Secure Polarization Multiplexed M-QAM Signal with Symbol Placement Retention Masking Method
Keiji Shimada, Mizuki Inagaki, Takahiro Kodama (Kagawa Univ.) OCS2021-36
In recent years, optical communication transceivers have been required to have high confidentiality for data. A shared k... [more] OCS2021-36
pp.16-21
PN, NS, OCS
(Joint)
2021-06-25
15:50
Online Online (Online) Study of the Effect on Soft-decision Decoding of the Coherent M-QAM using Multi-stage symbol Placement Retention Masking
Keiji Shimada, Masahiro Misumi, Takahiro Kodama (Kagawa Univ.) OCS2021-8
In recent digital coherent optical communication systems, to keep data highly confidential, research is being conducted ... [more] OCS2021-8
pp.35-39
NS, IN, CS, NV
(Joint)
2019-09-06
14:55
Miyagi Research Institute of Electrical Communication, Tohoku Univ. (Miyagi) A study on high efficiency phase shift keying on 4-dimensional Euclidean space
Sho Kakuwa, Masahiro Fujii (Utsunomiya Univ.) CS2019-60
Symbol mappings in two-dimensional Euclidean signal space, such as PSK and QAM, have a limitation of possible distance b... [more] CS2019-60
pp.69-73
RCS 2019-06-21
09:30
Okinawa Miyakojima Hirara Port Terminal Building (Okinawa) A study on high efficiency phase shift keying on 3-dimensional Euclidean space
Sho Kakuwa, Masahiro Fujii (Utsunomiya Univ.), Takanori Iwamatsu (FTN) RCS2019-82
It is necessary to assign many symbols on In-phase and Quadrature-phase(IQ)-diagram for high speed transmission,but it c... [more] RCS2019-82
pp.261-266
SRW 2019-06-10
09:25
Kanagawa Anritsu (Kanagawa) Blind compensation for wide-band single carrier systems with various frequency-dependent IQ imbalance
Hideki Mori, Tadao Nakagawa, Naoto Sasaoka (Tottori Univ.), Doohwan Lee (NTT) SRW2019-2
As the frequency bandwidth in wireless communications are wide, impairments of analog circuits of transceivers including... [more] SRW2019-2
pp.7-11
SIS 2019-03-07
10:20
Tokyo Tokyo Univ. Science, Katsushika Campus (Tokyo) A Study on IQ Imbalance Compensation with Decision Feedback Equalizer for Broadband OFDM Systems
Hiroki Inata, Naoto Sasaoka, Tadao Nakagawa, Yoshio Itoh (Tottori Univ.) SIS2018-46
In order to realize high-speed wireless communications, higher frequency and broader band are being advanced. However am... [more] SIS2018-46
pp.49-52
SRW 2019-01-15
13:25
Kanagawa Mitsubishi Electric (Oofuna) (Kanagawa) Blind frequency-dependent IQ imbalance compensation for single carrier systems
Hideki Mori, Tadao Nakagawa, Naoto Sasaoka (Tottori Univ.), Doohwan Lee, Takana Kaho (NTT) SRW2018-50
As the frequency bandwidth in wireless communications is wide, impairments of analog circuits of transceivers including ... [more] SRW2018-50
pp.25-29
OPE, LQE, OCS 2018-10-19
13:05
Saga (Saga) Optimization of signal amplitudes for dynamic range of analog-to-digital convertor in digital coherent reception of ultra-high QAM optical signals
Yasuhiro Kawabata, Koji Igarashi (Osaka Univ.) OCS2018-45 OPE2018-81 LQE2018-70
In the digital coherent reception of ultra-high quadrature amplitude modulation (QAM) optical signals, the received ampl... [more] OCS2018-45 OPE2018-81 LQE2018-70
pp.93-97
RCS, SR, SRW
(Joint)
2018-03-02
11:45
Kanagawa YRP (Kanagawa) Blind frequency-dependent IQ imbalance compensation using constant norm algorithm for OFDM systems
Ryoto Hamabe, Tadao Nakagawa (Tottori Univ.), Doohwan Lee, Takana Kaho (NTT) SRW2017-90
As the frequency bandwidth in wireless communications are wide, impairments of analog circuits of transceivers including... [more] SRW2017-90
pp.105-108
MW 2017-05-19
13:50
Osaka Osaka Univ. (Seminar Room1, Osaka Univ. Kaikan) (Osaka) Ku-band Vector-Sum Phase Shifter Using LC-Type PPF With Adjustable Operating Frequency
Takanobu Fujiwara, Koji Tsutsumi, Mitsuhiro Shimozawa (Mitsubishi Electric Corp.) MW2017-20
Recently many vector-sum phase shifters designed with cost-effective silicon process have been reported, featuring their... [more] MW2017-20
pp.71-76
MW, ICD 2017-03-03
10:50
Okayama Okayama Prefectural Univ. (Okayama) Speeding up using Parallel-Serial conversion in FPGA implementation of quadrature modulation Envelope Pulse Width Modulation Transmitter
Kouhei Nagasawa, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Science) MW2016-207 ICD2016-137
This paper presents a new configuration using a serializer on quadrature-modulation (QM) envelope-pulse-width-modulation... [more] MW2016-207 ICD2016-137
pp.107-112
AP, RCS, WPT, SAT
(Joint)
2015-11-04
13:40
Okinawa Okinawa Prefectural Museum & Art Museum (Okinawa) A Study on OFDM/PM Scheme with Exponential Companding Technique
Fukami Keisuke, Saito Masato (Ryukyu Univ.) SAT2015-47
We have studied OFDM/PM (Orthogonal Frequency Division Multiplexing over Phase Modulation) scheme for high-speed satelli... [more] SAT2015-47
pp.1-6
OPE, OCS, OFT
(Joint) [detail]
2015-02-20
15:50
Kagoshima (Kagoshima) RZ-OOK to RZ-DQPSK Format Conversion With All-Optical Clock Regeneration
Naoya Oka, Keita Mizusaka, Motoharu Matsuura (UEC) OFT2014-79 OPE2014-234
We demonstrated RZ-OOK to RZ-DQPSK format conversion with all-optical clock regeneration, which does not require a conve... [more] OFT2014-79 OPE2014-234
pp.117-120(OFT), pp.175-178(OPE)
 Results 1 - 17 of 17  /   
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