IEICE Trans

Tomoaki OHTSUKI

FOREWORD Tomoaki OHTSUKI
Publication: Publication Date: 2022/02/01 Vol. E105-B No. 2 pp. 97-97 Type of Manuscript: FOREWORD Category: Keyword:
	Summary \| Full Text:PDF(128.4KB)

Overloaded Wireless MIMO Switching for Information Exchanging through Untrusted Relay in Secure Wireless Communication Arata TAKAHASHI Osamu TAKYU Hiroshi FUJIWARA Takeo FUJII Tomoaki OHTSUKI
Publication: Publication Date: 2021/10/01 Vol. E104-B No. 10 pp. 1249-1259 Type of Manuscript: Special Section PAPER (Special Section on Dynamic Spectrum Sharing for Future Wireless Systems) Category: Keyword: wireless MIMO switching, physical layer security, mathematical optimization,
	Summary \| Full Text:PDF(2MB)

FOREWORD Tomoaki OHTSUKI
Publication: Publication Date: 2021/09/01 Vol. E104-B No. 9 pp. 983-983 Type of Manuscript: FOREWORD Category: Keyword:
	Summary \| Full Text:PDF(132.1KB)

Spatial Degrees of Freedom Exploration and Analog Beamforming Designs for Signature Spatial Modulation Yuwen CAO Tomoaki OHTSUKI
Publication: Publication Date: 2021/08/01 Vol. E104-B No. 8 pp. 934-941 Type of Manuscript: PAPER Category: Fundamental Theories for Communications Keyword: spatial degrees of freedom (DoF), signal- and spatial-constellations, analog shift weighting, signature spatial modulation (SSM), analog beamforming,
	Summary \| Full Text:PDF(1MB)

A Smart City Based on Ambient Intelligence Tomoaki OHTSUKI
Publication: Publication Date: 2017/09/01 Vol. E100-B No. 9 pp. 1547-1553 Type of Manuscript: INVITED PAPER (Special Issue the Past, Present, and Future of Communications Technologies in the IEICE) Category: Network Keyword: a smart city, ambient intelligence, information and communication technology (ICT), Internet of things (IoT),
	Summary \| Full Text:PDF(1.4MB)

Low Computational Complexity Direction-of-Arrival Estimation of Wideband Signal Sources Based on Squared TOPS Hirotaka HAYASHI Tomoaki OHTSUKI
Publication: Publication Date: 2017/01/01 Vol. E100-A No. 1 pp. 219-226 Type of Manuscript: Special Section PAPER (Special Section on Wideband Systems) Category: Keyword: array signal processing, DOA estimation, wideband signals,
	Summary \| Full Text:PDF(793.5KB)

DOA Estimation Using Temporal Spatial Virtual Array Based on Doppler Shift with Adaptive PRI Control Hirotaka HAYASHI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2016/09/01 Vol. E99-B No. 9 pp. 2009-2018 Type of Manuscript: Special Section PAPER (Special Section on Integration Technologies of Ambient Intelligence and Sensor Networks) Category: Keyword: array signal processing, DOA estimation, Doppler radar, MIMO radar,
	Summary \| Full Text:PDF(1012.5KB)

Algorithm Design of Relative Magnitude Coefficients Using Brent's Method on the K-User MIMO-IFC Kunitaka MATSUMURA Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2016/08/01 Vol. E99-B No. 8 pp. 1902-1909 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: MIMO, interference alignment, Brent's method,
	Summary \| Full Text:PDF(611.6KB)

Power-Absorption-Based Model for Power Compensation in WLAN Positioning Using Smartphone Masaaki YAMAMOTO Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2015/06/01 Vol. E98-B No. 6 pp. 1125-1132 Type of Manuscript: PAPER Category: Sensing Keyword: indoor, positioning, WLAN, smartphone,
	Summary \| Full Text:PDF(1.4MB)

FOREWORD Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2014/09/01 Vol. E97-B No. 9 pp. 1750-1751 Type of Manuscript: FOREWORD Category: Keyword:
	Summary \| Full Text:PDF(227.2KB)

Adaptive Q-Learning Cell Selection Method for Open-Access Femtocell Networks: Multi-User Case Chaima DHAHRI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2014/08/01 Vol. E97-B No. 8 pp. 1679-1688 Type of Manuscript: PAPER Category: Network Management/Operation Keyword: open access femtocell networks, handover, reinforcement learning, Q-learning, fuzzy logic,
	Summary \| Full Text:PDF(3.1MB)

Optimal Channel-Sensing Scheme for Cognitive Radio Systems Based on Fuzzy Q-Learning Fereidoun H. PANAHI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2014/02/01 Vol. E97-B No. 2 pp. 283-294 Type of Manuscript: Special Section PAPER (Special Section on Technologies for Effective Utilization of Spectrum White Space) Category: Keyword: cognitive radio (CR), partially observable Markov decision process (POMDP), Fuzzy Q-Learning (FQL), Baum-Welch Algorithm (BWA),
	Summary \| Full Text:PDF(2.2MB)

MIMO Receiver with Antenna Subset Selection: Algorithm and Hardware Implementation Kazuhiko MITSUYAMA Tetsuomi IKEDA Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2013/04/01 Vol. E96-B No. 4 pp. 1039-1050 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: MIMO, antenna subset selection, condition number, hardware implementation, field experiment,
	Summary \| Full Text:PDF(3.2MB)

FOREWORD Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2012/12/01 Vol. E95-B No. 12 pp. 3653-3653 Type of Manuscript: FOREWORD Category: Keyword:
	Summary \| Full Text:PDF(227.1KB)

State Classification with Array Sensor Using Support Vector Machine for Wireless Monitoring Systems Jihoon HONG Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2012/10/01 Vol. E95-B No. 10 pp. 3088-3095 Type of Manuscript: Special Section PAPER (Special Section on Medical Information Communication Technology for Disaster Recovery and Human Health Care Support) Category: Keyword: wireless monitoring, array antenna, support vector machine,
	Summary \| Full Text:PDF(1.1MB)

PAPR Reduction of TDD-CDMA Using Joint Transmission Technique Norharyati BINTI HARUM Tomoaki OHTSUKI Masao NAKAGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2012/03/01 Vol. E95-B No. 3 pp. 933-942 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: TD-SCDMA, TDD, joint transmission, precoding, PAPR,
	Summary \| Full Text:PDF(1.1MB)

Subcarrier Mapping for Single-User SC-FDMA Relay Communications Yu HEMMI Koichi ADACHI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2011/12/01 Vol. E94-A No. 12 pp. 2776-2779 Type of Manuscript: Special Section LETTER (Special Section on Wideband Systems) Category: Keyword: relay communication, SC-FDMA, subcarrier mapping,
	Summary \| Full Text:PDF(831.7KB)

Robust DOA Estimation for Uncorrelated and Coherent Signals Hui CHEN Qun WAN Hongyang CHEN Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2011/10/01 Vol. E94-A No. 10 pp. 2035-2038 Type of Manuscript: LETTER Category: Digital Signal Processing Keyword: coherent signals, direction of arrival(DOA), sparse reconstruction,
	Summary \| Full Text:PDF(218.5KB)

Performance Evaluation of Iterative LDPC-Coded MIMO OFDM System with Time Interleaving Kazuhiko MITSUYAMA Kohei KAMBARA Takayuki NAKAGAWA Tetsuomi IKEDA Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2010/12/01 Vol. E93-A No. 12 pp. 2654-2662 Type of Manuscript: Special Section PAPER (Special Section on Wideband Systems) Category: Keyword: MIMO, MMSE, LDPC, time Interleaving,
	Summary \| Full Text:PDF(1.3MB)

6-Axis Sensor Assisted Low Complexity High Accuracy-Visible Light Communication Based Indoor Positioning System Chinnapat SERTTHIN Tomoaki OHTSUKI Masao NAKAGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2010/11/01 Vol. E93-B No. 11 pp. 2879-2891 Type of Manuscript: Special Section PAPER (Special Section on Fundamental Issues on Deployment of Ubiquitous Sensor Networks) Category: Keyword: visible light communication (VLC), visible light communication identification (VLID), field-of-view (FOV), 6-axis sensor, root means square of error distance (RMSED), switching estimated receiver position (SwERP),
	Summary \| Full Text:PDF(3.5MB)

Multi-Band Received Signal Strength Fingerprinting Based Indoor Location System Chinnapat SERTTHIN Takeo FUJII Tomoaki OHTSUKI Masao NAKAGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2010/08/01 Vol. E93-B No. 8 pp. 1993-2003 Type of Manuscript: Special Section PAPER (Special Section on Implementation, Experiments, and Practice for Ad Hoc and Mesh Networks) Category: Keyword: fingerprinting, multi-band signal, frequency diversity, indoor positioning system, received signal strength (RSS), multi-frequency band (multi-band) capability terminal,
	Summary \| Full Text:PDF(2.7MB)

An Improved User Selection Algorithm in Multiuser MIMO Broadcast with Channel Prediction Zhi MIN Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2009/08/01 Vol. E92-B No. 8 pp. 2667-2674 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: multiuser MIMO, user selection, multiuser diversity,
	Summary \| Full Text:PDF(327KB)

Indoor Event Detection with Eigenvector Spanning Signal Subspace for Home or Office Security Shohei IKEDA Hiroyuki TSUJI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2009/07/01 Vol. E92-B No. 7 pp. 2406-2412 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: home or office security, intruder detection, eigenvector spanning signal subspace, antenna array,
	Summary \| Full Text:PDF(865.6KB)

Random Beamforming Using Iterative Power Allocation with Small Feedback Information and Low Latency Yuki TSUCHIYA Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2009/05/01 Vol. E92-B No. 5 pp. 1908-1911 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: random beamforming, multiuser diversity, power allocation, AMC,
	Summary \| Full Text:PDF(400KB)

Turbo Equalized Double Window Cancellation and Combining Robust to Large Delay Spread Channel JunHwan LEE Tomoaki OHTSUKI Masao NAKAGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2009/02/01 Vol. E92-B No. 2 pp. 517-526 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: OFDM, ISI, ICI, TE, DWCC, HDF, SDF,
	Summary \| Full Text:PDF(1.3MB)

Convergence Acceleration of Iterative Signal Detection for MIMO System with Belief Propagation Satoshi GOUNAI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2008/08/01 Vol. E91-B No. 8 pp. 2640-2647 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: MIMO systems, belief propagation, iterative signal detection, convergence acceleration,
	Summary \| Full Text:PDF(721.2KB)

Mapping for Iterative MMSE-SIC with Belief Propagation Satoshi GOUNAI Tomoaki OHTSUKI Toshinobu KANEKO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2008/07/01 Vol. E91-B No. 7 pp. 2187-2197 Type of Manuscript: PAPER Category: Fundamental Theories for Communications Keyword: MIMO, MMSE-SIC, Belief Propagation, Mapping,
	Summary \| Full Text:PDF(996.9KB)

MIMO Systems in the Presence of Feedback Delay Kenichi KOBAYASHI Tomoaki OHTSUKI Toshinobu KANEKO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2008/03/01 Vol. E91-B No. 3 pp. 829-836 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: MIMO, CSI, E-SDM, SVD, ZF, MMSE,
	Summary \| Full Text:PDF(765.2KB)

MIMO System with Relative Phase Difference Time-Shift Modulation for Rician Fading Environment Kenichi KOBAYASHI Takao SOMEYA Tomoaki OHTSUKI Sigit P.W. JAROT Tsuyoshi KASHIMA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2008/02/01 Vol. E91-B No. 2 pp. 459-465 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: MIMO, Rician fading, direct path, phase difference, Turbo code,
	Summary \| Full Text:PDF(682.1KB)

Scheduling Algorithm with Power Allocation for Random Unitary Beamforming Yuki TSUCHIYA Tomoaki OHTSUKI Toshinobu KANEKO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2008/01/01 Vol. E91-B No. 1 pp. 232-238 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: random beamforming, MIMO, power allocation, AMC,
	Summary \| Full Text:PDF(417.8KB)

Double Window Cancellation and Combining for OFDM in Time-Invariant Large Delay Spread Channel JunHwan LEE Yoshihisa KISHIYAMA Tomoaki OHTSUKI Masao NAKAGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2007/10/01 Vol. E90-A No. 10 pp. 2066-2078 Type of Manuscript: Special Section PAPER (Special Section on Nonlinear Theory and its Applications) Category: Communications and Sequences Keyword: CP-OFDM, DWCC, ISI, ICI, QPSK, 16QAM, 64QAM,
	Summary \| Full Text:PDF(2.2MB)

Performance Evaluation of SAGE Algorithm for Channel Estimation and Data Detection Using Superimposed Training in MIMO System Fumiaki TSUZUKI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2007/06/01 Vol. E90-B No. 6 pp. 1460-1466 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: SAGE algorithm, superimposed pilot, MIMO,
	Summary \| Full Text:PDF(410.7KB)

Lowering the Error Floors of Irregular LDPC Code on Fast Fading Environment with Perfect and Imperfect CSIs Satoshi GOUNAI Tomoaki OHTSUKI Toshinobu KANEKO
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2007/03/01 Vol. E90-B No. 3 pp. 569-577 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: irregular Low-Density Parity-Check code, ordered statistic decoding, CRC, error floor, Channel State Information,
	Summary \| Full Text:PDF(477.8KB)

LDPC Codes in Communications and Broadcasting Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2007/03/01 Vol. E90-B No. 3 pp. 440-453 Type of Manuscript: INVITED SURVEY PAPER Category: Keyword: LDPC codes, BP algorithms, LLR, cooperation,
	Summary \| Full Text:PDF(339.1KB)

Companding System Based on Time Clustering for Reducing Peak Power of OFDM Symbol in Wireless Communications Osamu TAKYU Tomoaki OHTSUKI Masao NAKAGAWA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/07/01 Vol. E89-A No. 7 pp. 1884-1891 Type of Manuscript: Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks) Category: Keyword: peak power problem, OFDM symbol, compressing and expanding (companding) system,
	Summary \| Full Text:PDF(467.7KB)

Chip-Level Detection in Optical Frequency Hopping Code Division Multiple Access Shoji ICHIKI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/07/01 Vol. E89-A No. 7 pp. 2056-2062 Type of Manuscript: PAPER Category: Communication Theory and Signals Keyword: CDMA, frequency hopping, chip-level detection, FBG,
	Summary \| Full Text:PDF(364.2KB)

Bootstrapped Modified Weighted Bit Flipping Decoding of Low Density Parity Check Codes Yoichi INABA Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/04/01 Vol. E89-A No. 4 pp. 1145-1149 Type of Manuscript: LETTER Category: Coding Theory Keyword: low density parity check codes, WBF algorithm, modified WBF algorithm, bootstrap decoding,
	Summary \| Full Text:PDF(257KB)

Reliability-Based Hybrid ARQ (RB-HARQ) Schemes Using Low-Density Parity-Check (LDPC) Codes Yoichi INABA Tomonori SAITO Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2006/04/01 Vol. E89-B No. 4 pp. 1170-1177 Type of Manuscript: PAPER Category: Fundamental Theories for Communications Keyword: Reliability-Based Hybrid ARQ (RB-HARQ) scheme, Low-Density Parity-Check (LDPC) Codes,
	Summary \| Full Text:PDF(587.1KB)

A Sign Selection Method of Orthogonal Variable Spreading Factor Code for Peak Power Reduction in Multi-Rate OFCDM Systems Osamu TAKYU Tomoaki OHTSUKI Masao NAKAGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2006/04/01 Vol. E89-B No. 4 pp. 1333-1345 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: OFCDM, multi-rate communication, OVSF code, peak power problem,
	Summary \| Full Text:PDF(1.3MB)

Spatial Multiplexing in Optical Wireless MIMO Communications Over Indoor Environment Daisuke TAKASE Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2006/04/01 Vol. E89-B No. 4 pp. 1364-1371 Type of Manuscript: PAPER Category: Optical Wireless Communications Keyword: optical wireless multiple-input multiple-output (OMIMO), subcarrier multiplexing (SCM), nonlinearity of LD, zero forcing (ZF), intermodulation distortion (IMD), optical modulation index (OMI),
	Summary \| Full Text:PDF(454.8KB)

Computational Complexity Reduction of MLD Based on SINR in MIMO Spatial Multiplexing Systems Katsunari HONJO Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2006/03/01 Vol. E89-B No. 3 pp. 914-921 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: MIMO, MLD, SINR,
	Summary \| Full Text:PDF(629.5KB)

Performance Analysis of Statistical STBC Cooperative Diversity Using Binary Sensors with Observation Noise Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2006/03/01 Vol. E89-B No. 3 pp. 970-973 Type of Manuscript: LETTER Category: Network Keyword: cooperative diversity, STBC, sensor network, observation noise,
	Summary \| Full Text:PDF(194.3KB)

Channel Estimation with Selective Superimposed Pilot Sequences under Fast Fading Environments Fumiaki TSUZUKI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2006/02/01 Vol. E89-B No. 2 pp. 556-563 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: channel estimation, selective superimposed pilot,
	Summary \| Full Text:PDF(782.8KB)

Lowering Error Floor of Irregular LDPC Codes by CRC and OSD Algorithm Satoshi GOUNAI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2006/01/01 Vol. E89-B No. 1 pp. 1-10 Type of Manuscript: PAPER Category: Fundamental Theories for Communications Keyword: irregular low-density parity-check code, log-likelihood ratio belief propagation, ordered statistic decoding, CRC, error floor, maximum likelihood decoding,
	Summary \| Full Text:PDF(564.2KB)

Rake Performance for UWB-IR System with SISO and MISO Takahiro EZAKI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2005/10/01 Vol. E88-B No. 10 pp. 4112-4116 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: UWB-IR, SISO-UWB-IR, MISO-UWB-IR, MMSE-RAKE,
	Summary \| Full Text:PDF(304.8KB)

Throughput Maximization Transmission Control Scheme for MIMO Systems Kenji SUTO Yoshitaka HARA Tomoaki OHTSUKI Yoshikazu TAKEI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2005/10/01 Vol. E88-B No. 10 pp. 4040-4046 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: MIMO, throughput, transmission control,
	Summary \| Full Text:PDF(476.2KB)

Computational Complexity and Performance of RAKE Receivers with Channel Estimation for DS-UWB Hiroyuki SATO Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/09/01 Vol. E88-A No. 9 pp. 2318-2326 Type of Manuscript: Special Section PAPER (Special Section on Ultra Wideband Systems) Category: RAKE Receiver Keyword: DS-UWB, MRC-RAKE, MMSE-RAKE, MRC-RAKE-Equalizer, the computational complexity, the accuracy of channel estimation,
	Summary \| Full Text:PDF(417.9KB)

Decoding Algorithms Based on Oscillation for Low-Density Parity Check Codes Satoshi GOUNAI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/08/01 Vol. E88-A No. 8 pp. 2216-2226 Type of Manuscript: PAPER Category: Coding Theory Keyword: low-density parity-check code, log likelihood ratio belief propagation, ordered statistic decoding, oscillation,
	Summary \| Full Text:PDF(667.4KB)

Criterion for Reducing Error Rate Degradation by Nonlinear Amplifier for Multicarrier Transmission Osamu TAKYU Tomoaki OHTSUKI Masao NAKAGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2005/07/01 Vol. E88-B No. 7 pp. 3057-3061 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: multi-carrier transmission, nonlinear distortion, peak power problem,
	Summary \| Full Text:PDF(289.8KB)

Pre-Rake Diversity Combining for UWB Systems in IEEE 802.15 UWB Multipath Channel Shunsuke IMADA Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2005/05/01 Vol. E88-B No. 5 pp. 2193-2199 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: UWB, Rake diversity combining, Pre-Rake diversity combining,
	Summary \| Full Text:PDF(741.4KB)

Multiple-Subcarrier Optical Communication System with Peak Reduction Carriers Shota TERAMOTO Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2004/11/01 Vol. E87-B No. 11 pp. 3385-3388 Type of Manuscript: LETTER Category: Optical Wireless Communications Keyword: multiple-subcarrier, infrared, optical system, power reduction, peak reduction carrier,
	Summary \| Full Text:PDF(318.5KB)

Information and Signal Processing for Sensor Networks Akira OGAWA Takaya YAMAZATO Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/10/01 Vol. E87-A No. 10 pp. 2599-2606 Type of Manuscript: INVITED PAPER (Special Section on Wide Band Systems) Category: Keyword: sensor networks, collaborative information and signal processing, joint source and channel coding, deterministic and statistic collaboration, cooperative diversity,
	Summary \| Full Text:PDF(316.8KB)

OFDM Packet Transmission System with Added Pilot Semi-Blind Iterative Channel Estimation for Tracking Fast Time-Varying Channel Naoto OHKUBO Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2004/09/01 Vol. E87-B No. 9 pp. 2729-2737 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: OFDM, added pilot semi-blind channel estimation,
	Summary \| Full Text:PDF(859.1KB)

Diversity Gain in Ultra Wideband Impulse Radio (UWB-IR) Takahiro EZAKI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2004/08/01 Vol. E87-B No. 8 pp. 2385-2390 Type of Manuscript: LETTER Category: Wireless Communication Technology Keyword: UWB-IR, ST-UWB-IR, TI-UWB-IR, diversity,
	Summary \| Full Text:PDF(511.6KB)

Space-Time/Space-Frequency Block Coded OFDM with Diagonalized Maximum Likelihood Decoder (ST/SF-OFDM with DMLD) Hiroshi KANEMARU Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2004/07/01 Vol. E87-B No. 7 pp. 2034-2039 Type of Manuscript: LETTER Category: Wireless Communication Technology Keyword: STBC, ST-OFDM, SF-OFDM, DMLD,
	Summary \| Full Text:PDF(419.2KB)

Space-Time-Frequency Block Codes over Frequency Selective Fading Channels Kenji SUTO Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2004/07/01 Vol. E87-B No. 7 pp. 1939-1945 Type of Manuscript: PAPER Category: Wireless Communication Technology Keyword: STBC, ST-OFDM, SF-OFDM, STF-OFDM,
	Summary \| Full Text:PDF(387.3KB)

Frequency Offset Compensation with MMSE-MUD for Multi-Carrier CDMA in Quasi-Synchronous Uplink Osamu TAKYU Tomoaki OHTSUKI Masao NAKAGAWA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2004/06/01 Vol. E87-B No. 6 pp. 1495-1504 Type of Manuscript: PAPER Category: Wireless Communication Technology Keyword: MC-CDMA, MMSE-MUD, frequency offset compensation, quasi-synchronous, uplink,
	Summary \| Full Text:PDF(758.8KB)

Decoding Algorithms for Low-Density Parity-Check Codes with Multilevel Modulations Hisashi FUTAKI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2004/05/01 Vol. E87-B No. 5 pp. 1282-1289 Type of Manuscript: PAPER Category: Fundamental Theories Keyword: low-density parity-check (LDPC) code, belief propagation (BP) algorithm, uniformly most powerful (UMP) BP-based algorithm, normalized BP-based algorithm, multilevel modulation,
	Summary \| Full Text:PDF(453.9KB)

Low-Density Parity-Check (LDPC) Coded OFDM Systems: Bit Error Rate and the Number of Decoding Iterations Hisashi FUTAKI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2003/11/01 Vol. E86-B No. 11 pp. 3310-3316 Type of Manuscript: LETTER Category: Wireless Communication Technology Keyword: OFDM, turbo codes, low-density parity-check codes, belief propagation algorithm,
	Summary \| Full Text:PDF(535.5KB)

Space-Time Transmit Diversity Schemes with Low-Density Parity-Check (LDPC) Codes Hisashi FUTAKI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2003/10/01 Vol. E86-B No. 10 pp. 3131-3136 Type of Manuscript: LETTER Category: Wireless Communication Technology Keyword: space-time block coding, turbo codes, low-density parity-check codes,
	Summary \| Full Text:PDF(421.3KB)

Multibits/Sequence-Period Optical CDMA Receiver with Double Optical Hardlimiters Kenji WAKAFUJI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2003/10/01 Vol. E86-A No. 10 pp. 2670-2677 Type of Manuscript: PAPER Category: Spread Spectrum Technologies and Applications Keyword: optical CDMA, DHL, OOK, multibits/sequence-period, Reed-Solomon codes,
	Summary \| Full Text:PDF(536.2KB)

Design Criteria for Phase Sequences in Selected Mapping Naoto OHKUBO Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2003/09/01 Vol. E86-B No. 9 pp. 2628-2636 Type of Manuscript: PAPER Category: Wireless Communication Technology Keyword: SLM, PAPR, MC-CDMA, PTS,
	Summary \| Full Text:PDF(666.6KB)

Multiple Subcarrier Modulation for Infrared Wireless Systems Using Punctured Convolutional Codes and Variable Amplitude Block Codes Hiroe YAMAGUCHI Tomoaki OHTSUKI Iwao SASASE
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2003/08/01 Vol. E86-B No. 8 pp. 2433-2439 Type of Manuscript: PAPER Category: Optical Wireless Communications Keyword: indoor infrared wireless system, MSM, RCPC, block code,
	Summary \| Full Text:PDF(523.7KB)

Improved Design Criteria and New Trellis Codes for Space-Time Trellis Coded Modulation in Fast Fading Channels Yukihiro SASAZAKI Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2003/03/01 Vol. E86-B No. 3 pp. 1057-1062 Type of Manuscript: PAPER Category: Wireless Communication Technology Keyword: space-time trellis code, transmit diversity (TD), fast fading channels,
	Summary \| Full Text:PDF(347.3KB)

Equalization for Infrared Wireless Systems Using OOK-CDMA Hiroe YAMAGUCHI Ryoko MATSUO Tomoaki OHTSUKI Iwao SASASE
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2002/10/01 Vol. E85-B No. 10 pp. 2292-2299 Type of Manuscript: PAPER Category: Optical Wireless Communications Keyword: indoor infrared wireless system, OOK-CDMA, equalizer,
	Summary \| Full Text:PDF(499.7KB)

Indoor Infrared Wireless Systems Using OOK-CDMA with Decision-Feedback Equalizer on Diffuse Channels Hiroe YAMAGUCHI Ryoko MATSUO Michihito MATSUO Tomoaki OHTSUKI Iwao SASASE
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2001/04/01 Vol. E84-B No. 4 pp. 960-966 Type of Manuscript: PAPER Category: Wireless Communication Technology Keyword: infrared, OOK, CDMA, DFE, channel estimation,
	Summary \| Full Text:PDF(516.7KB)

Direct-Detection Optical Synchronous CDMA Systems with Interference Canceller Using Group Information Codes Hiroshi SAWAGASHIRA Katsuhiro KAMAKURA Tomoaki OHTSUKI Iwao SASASE
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2000/11/25 Vol. E83-A No. 11 pp. 2138-2142 Type of Manuscript: Special Section LETTER (Special Section on Spread Spectrum Techniques and Applications) Category: Keyword: CDMA, multiple access interference, interference canceller, group information codes,
	Summary \| Full Text:PDF(453.9KB)

Optical Spread Time CDMA Communication Systems with PPM Signaling Katsuhiro KAMAKURA Tomoaki OHTSUKI Iwao SASASE
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1999/07/25 Vol. E82-B No. 7 pp. 1038-1047 Type of Manuscript: PAPER Category: Optical Communication Keyword: optical ST-CDMA, PPM, MAI, phase mask, spectral resolution, repetition rate,
	Summary \| Full Text:PDF(1.1MB)

Performance Analysis of ADSL with Punctured Convolutional Code Weizu YANG Tomoaki OHTSUKI Masami UEDA Kazuya MATSUMOTO Iwao SASASE
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1999/07/25 Vol. E82-B No. 7 pp. 1030-1037 Type of Manuscript: PAPER Category: Communication Theory Keyword: ADSL, DMT, punctured convolutional code,
	Summary \| Full Text:PDF(971.4KB)

Performance Analysis of Direct-Detection Optical CDMA Systems with Optical Hard-Limiter Using Equal-Weight Orthogonal Signaling Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1999/03/25 Vol. E82-B No. 3 pp. 512-520 Type of Manuscript: PAPER Category: Optical Communication Keyword: CDMA, channel interference, canceller, equal-weight orthogonal signaling, optical hard-limiter,
	Summary \| Full Text:PDF(294.9KB)

Performance Analysis of Optical Frequency-Domain Encoding CDMA Enhancement of Frequency Division Multiplexing Katsuhiro KAMAKURA Yoshinobu GAMACHI Hideyuki UEHARA Tomoaki OHTSUKI Iwao SASASE
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1998/09/25 Vol. E81-B No. 9 pp. 1749-1757 Type of Manuscript: PAPER Category: Optical Communication Keyword: FE-CDMA, FDM, spatial filter, phase mask, ultrashort light pulse, multi-access interference (MAI),
	Summary \| Full Text:PDF(841.8KB)

Direct-Detection Optical Asynchronous CDMA Systems with Double Optical Hard-Limiters: APD Noise and Thermal Noise Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1998/07/25 Vol. E81-B No. 7 pp. 1491-1499 Type of Manuscript: PAPER Category: Optical Communication Keyword: CDMA, channel interference, double optical hard-limiters, APD noise, thermal noise,
	Summary \| Full Text:PDF(662.2KB)

Performance Analysis of Direct-Detection Optical Synchronous CDMA Systems with Co-channel Interference Canceller Tomoaki OHTSUKI Masanori TAKEOKA Eiji IWAHASHI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1997/11/25 Vol. E80-A No. 11 pp. 2260-2263 Type of Manuscript: Special Section LETTER (Special Section on Information Theory and Its Applications) Category: Coding Theory/Communication Keyword: CDMA, co-channel interference, canceller,
	Summary \| Full Text:PDF(269.9KB)

Direct-Detection Optical Synchronous CDMA Systems with Channel Interference Canceller Using Time Division Reference Signal Tomoaki OHTSUKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1996/12/25 Vol. E79-A No. 12 pp. 1948-1956 Type of Manuscript: Special Section PAPER (Special Secton on Spread Spectrum Techniques and Applications) Category: Keyword: CDMA, channel interference,canceller,time division reference signal,
	Summary \| Full Text:PDF(730.5KB)

Access Timing Controlled Direct-Detection Optical CDMA Systems with PPM Signaling Tomoaki OHTSUKI Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1996/09/25 Vol. E79-A No. 9 pp. 1392-1400 Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications) Category: Communication/Spread Spectrum Keyword: CDMA, ATC-CDMA, prime sequence codes, PPM,
	Summary \| Full Text:PDF(711.9KB)

Cutoff Rate Analysis of Overlapping Multi-Pulse Pulse Position Modulation (OMPPM) in Optical Direct-Detection Channel Tomoaki OHTSUKI Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1996/09/25 Vol. E79-A No. 9 pp. 1471-1474 Type of Manuscript: Special Section LETTER (Special Section on Information Theory and Its Applications) Category: Communication Keyword: OMPPM, cutoff rate, distance,
	Summary \| Full Text:PDF(298.4KB)

Performance Analysis of Optical Synchronous PPM/CDMA Systems with Interference Canceller Under Number-State Light Field Yoshinobu GAMACHI Tomoaki OHTSUKI Hideyuki UEHARA Iwao SASASE
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/07/25 Vol. E79-B No. 7 pp. 915-922 Type of Manuscript: Special Section PAPER (Special Issue on Optical Access Networks toward Life Enhancement) Category: Keyword: interference, interference canceller, PPM, synchronous CDMA,
	Summary \| Full Text:PDF(712KB)

Performance Analysis of Multi-Pulse Pulse Position Modulation Using Avalanche Photodiode in Optical Intersatellite Links Norihito AOKI Tomoaki OHTSUKI Iwao SASASE
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/01/25 Vol. E79-B No. 1 pp. 52-56 Type of Manuscript: PAPER Category: Satellite Communication Keyword: APD, ISL, MPPM,
	Summary \| Full Text:PDF(416.3KB)

Effects of Hard-Limiter and Error Correction Coding on Performance of Direct-Detection Optical CDMA Systems with PPM Signaling Tomoaki OHTSUKI Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1995/09/25 Vol. E78-A No. 9 pp. 1092-1101 Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications) Category: Keyword: hard-limiter, error correction coding, CDMA, PPM,
	Summary \| Full Text:PDF(805.5KB)

Coding for Multi-Pulse PPM with Imperfect Slot Synchronization in Optical Direct-Detection Channels Kazumi SATO Tomoaki OHTSUKI Iwao SASASE
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1995/06/25 Vol. E78-B No. 6 pp. 916-922 Type of Manuscript: PAPER Category: Optical Communication Keyword: multi-pulse pulse position modulation, slot synchronization, timing offset, punctured convolutional codes, Reed-Solomon codes,
	Summary \| Full Text:PDF(607.4KB)

Performance Analysis of Coherent Optical POLSK Receives with Local Oscillator Intensity Noise and Unmatched Quantum Efficiencies Hideyuki UEHARA Tomoaki OHTSUKI Iwao SASASE
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1994/12/25 Vol. E77-B No. 12 pp. 1590-1599 Type of Manuscript: PAPER Category: Optical Communication Keyword: coherent, POLSK, phase noise, intensity noise, quantum efficiencies,
	Summary \| Full Text:PDF(704.1KB)

Lower Bounds on Capacity and Cutoff Rate of Differential Overlapping Pulse Position Modulation in Optical Direct-Detection Channel Tomoaki OHTSUKI Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1994/10/25 Vol. E77-B No. 10 pp. 1230-1237 Type of Manuscript: PAPER Category: Optical Communication Keyword: DOPPM, capacity, cutoff rate, window,
	Summary \| Full Text:PDF(671.3KB)

Error Performance of Overlapping Multi-Pulse Pulse Position Modulation (OMPPM) and Trellis Coded OMPPM in Optical Direct-Detection Channel Tomoaki OHTSUKI Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1994/09/25 Vol. E77-B No. 9 pp. 1133-1143 Type of Manuscript: PAPER Category: Optical Communication Keyword: MPPM, OMPPM, trellis codes, distance,
	Summary \| Full Text:PDF(863.9KB)

Performance Analysis of Multi-Pulse PPM with Imperfect Slot Synchronization in Optical Direct-Detection Channel Kazumi SATO Tomoaki OHTSUKI Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1994/08/25 Vol. E77-B No. 8 pp. 1032-1039 Type of Manuscript: PAPER Category: Optical Communication Keyword: multi-pulse pulse position modulation, timing offset, timing jitter, slot synchronization,
	Summary \| Full Text:PDF(629.8KB)

Performance Analysis of Multi-Pulse Pulse Position Modulation (MPPM) in Noisy Photon Counting Channel Tomoaki OHTSUKI Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1994/08/25 Vol. E77-A No. 8 pp. 1381-1386 Type of Manuscript: Special Section LETTER (Special Section on Information Theory and Its Applications) Category: Keyword: MPPM, noisy photon counting channel, distance, convolutional codes, RS codes,
	Summary \| Full Text:PDF(462.2KB)

Capacity and Cutoff Rate of Overlapping Multi-Pulse Pulse Position Modulation (OMPPM) in Optical Direct-Detection Channel: Quantum-Limited Case Tomoaki OHTSUKI Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1994/08/25 Vol. E77-A No. 8 pp. 1298-1308 Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications) Category: Keyword: capacity, cutoff rate, OMPPM, quantum limited,
	Summary \| Full Text:PDF(890.4KB)

The Effects of Laser Phase Noise on Optical Coherent Coded Subcarrier Multiplexing System with Distributing Local Oscillator in Local Loop Tomoaki OHTSUKI Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1993/02/25 Vol. E76-C No. 2 pp. 293-300 Type of Manuscript: Special Section PAPER (Special Issue on Optical/Microwave Interaction Devices, Circuits and Systems) Category: Fiber Optic Radio Links Keyword: subcarrier multiplexing, phase noise, crosstalk, IMD,
	Summary \| Full Text:PDF(594.5KB)

Coherent Subcarrier Multiplexed System with Distributing Local Oscillator in Local Loop Tomoaki OHTSUKI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1992/06/25 Vol. E75-B No. 6 pp. 499-505 Type of Manuscript: Special Section PAPER (Special Issue on Communication Theory) Category: Keyword: subcarrier multiplexed, distributing local oscillator local loop, coherent SCM,
	Summary \| Full Text:PDF(607.4KB)

Parallel Rate-Variable Punctured Convolutional Coded PPM in Photon Communication Tomoaki OHTSUKI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1992/01/25 Vol. E75-A No. 1 pp. 46-51 Type of Manuscript: Special Section PAPER (Joint Special Section on Fundamentals of Next Generation Opto-Technologies) Category: Keyword: photon communication, punctured covolutional coded PPM,
	Summary \| Full Text:PDF(414.1KB)

Coherent Optical Polarization-Shift-Keying (POLSK) Homodyne System Using Phase-Diversity Receivers Ichiro SETO Tomoaki OHTSUKI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1992/01/25 Vol. E75-C No. 1 pp. 50-57 Type of Manuscript: Special Section PAPER (Joint Special Section on Fundamentals of Next Generation Opto-Technologies) Category: Keyword: coherent optical communications, phase-diversity homodyne receivers, polarization-shift-keying (POLSK),
	Summary \| Full Text:PDF(563.1KB)

Parallel Rate-Variable Punctured Convolutional Coded PPM in Photon Communication Tomoaki OHTSUKI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1992/01/25 Vol. E75-C No. 1 pp. 44-49 Type of Manuscript: Special Section PAPER (Joint Special Section on Fundamentals of Next Generation Opto-Technologies) Category: Keyword: photon communication, punctured covolutional coded PPM,
	Summary \| Full Text:PDF(468.2KB)

Coherent Optical Polarization-Shift-Keying (POLSK) Homodyne System Using Phase-Diversity Receivers Ichiro SETO Tomoaki OHTSUKI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1992/01/25 Vol. E75-A No. 1 pp. 52-59 Type of Manuscript: Special Section PAPER (Joint Special Section on Fundamentals of Next Generation Opto-Technologies) Category: Keyword: coherent optical communications, phase-diversity homodyne receivers, polarization-shift-keying (POLSK),
	Summary \| Full Text:PDF(494.6KB)

Cutoff Rate and Capacity of MPPM in Noiseless Photon Counting Channel Tomoaki OHTSUKI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1991/12/25 Vol. E74-B No. 12 pp. 4080-4084 Type of Manuscript: PAPER Category: Communication Systems and Transmission Equipment Keyword:
	Summary \| Full Text:PDF(378KB)