INTERNATIONAL – YNU Ochiai laboratory

Communication Theory Laboratory-Ochiai Lab. in Yokohama National University

2023

Y. Hama and H. Ochiai, "Time-Frequency Domain Non-Orthogonal Multiple Access for Power Efficient Communications," IEEE Transactions on Wireless Communications, to be published.
T. Shen, V. Yachongka, and H. Ochiai, "Secure NOMA-based indoor VLC networks with body blockage model," IEEE Wireless Communications and Networking Conference (WCNC), Glasgow, Scotland, UK, Mar. 2023, to be published.
H. Ochiai, K. Ikeya, and P. Mitran, "A new Polar code design based on reciprocal channel approximation," IEEE Transactions on Communications, vol. 71, no. 2, pp. 631-643, Feb. 2023.
Y. Hama, K. Hanazawa, H. Ochiai, and J. Shikata, "Performance Analysis for Coded Wireless Steganography System With OFDM Signaling," IEEE Radio & Wireless Week (RWW), Las Vegas, NV, USA, Jan. 2023.
E. Kurihara and H. Ochiai, "A Systematic Constellation Design for BICM Systems with Geometric Shaping," IEEE Consumer Communications & Networking Conference (CCNC), Las Vegas, NV, USA, Jan. 2023.

2022

M. Kaneko and H. Ochiai, "A New Low-Complexity Polar Code Construction for BICM Over AWGN Channels," IEEE Military Communications Conference (MILCOM), Rockville, MD, USA, Nov. 2022.
V. Yachongka, H. Yagi, and H. Ochiai, "Secret-Key Agreement Using Physical Identifiers for Degraded and Less Noisy Authentication Channels," IEEE Information Theory Workshop (ITW), Mumbai, India, Nov. 2022.
M. S. Motlagh, S. Majhi, P. Mitran and H. Ochiai, "On rate-splitting with non-unique decoding in multi-cell massive MIMO systems," IEEE Transactions on Communications, vol. 70, no. 9 pp. 5929- 5945, Sep. 2022.
Y. Hama and H. Ochiai, "Binary-Input Ternary-Output Turbo Codes for Ternary PSK Transmission," IEEE Communications Letters, vol. 26, no. 9, pp. 1974-1978, Sep. 2022.
Y. Hama and H. Ochiai, "Matched-Filter Detector with Quadrature Interference Cancellation for Coded Uplink Multiuser MIMO Systems with Massive IoT Devices," IEEE Transactions on Wireless Communications, vol.21, no. 6, pp. 4025-4038, Jun. 2022.
T. Matsumine, H. Ochiai, and J. Shikata, "Security gap improvement of BICM systems through bit-labeling optimization for the Gaussian wiretap channel," IEEE Access, vol.10, pp. 47805-47813, May 2022.
Y. Sun and H. Ochiai, "Maximum-Likelihood-Based Performance Enhancement of Clipped and Filtered OFDM Systems with Clipping Noise Cancellation," IEEE Wireless Communications Letters, vol.11, no. 3, pp. 448-452, Mar. 2022.

2021

Y. Hama, H. Ochiai, and J. Shikata, "Performance Analysis of Wireless Steganography based on OFDM and DFT-s-OFDM Signals over Frequency-Selective Rayleigh Fading Channels," Proceedings of IEEE International Symposium On Wireless Personal Multimedia Communications (WPMC 2021) , Okayama, Japan, Dec. 2021.
T. Matsumine, T. Koike-Akino, and H. Ochiai, "A Low-Complexity Probabilistic Amplitude Shaping with Short Linear Block Codes," IEEE Transactions on Communications, vol. 69, no. 12, pp. 7923 - 7933, Dec. 2021.
Y. Sun and H. Ochiai, "Performance Analysis and Comparison of Clipped and Filtered OFDM Systems with Iterative Distortion Recovery Techniques," IEEE Transactions on Wireless Communications, vol. 20, no. 11, pp. 7389-7403, Nov. 2021.
H. Ochiai, P. Mitran, and H. V. Poor, "Capacity-Approaching Polar Codes with Long Codewords and Successive Cancellation Decoding Based on Improved Gaussian Approximation," IEEE Transactions on Communications, vol.69, no. 1, pp. 31-43, Jan. 2021.
T. Shen and H. Ochiai, "A UAV-Enabled Wireless Powered Sensor Network Based on NOMA and Cooperative Relaying With Altitude Optimization," IEEE Open Journal of the Communication Society, vol. 2, pp. 21-34, 2021.

2020

Y. Hama and H. Ochiai, "Performance of Coded MIMO Spatial Modulation with Scaling Matched-Filter Detector," Proceedings of IEEE Global Communication Conference (GLOBECOM 2020) , Taipei, Taiwan, Dec. 2020.
R. Yamaguchi, H. Ochiai, and J. Shikata, "A Physical-Layer Security Based on Wireless Steganography Through OFDM and DFT-Precoded OFDM Signals," Proceedings of IEEE Vehicular Technology Conference Spring (VTC2020-Spring) , Online, May 2020.
Y. Yajima and H. Ochiai, "On Design of Multilevel Coded Modulation Based on CRC-Concatenated Polar Codes," Proceedings of IEEE Consumer Communications & Networking Conference (CCNC 2020) , Las Vegas, NV, USA, Jan. 2020.

2019

T. Matsumine and H. Ochiai, "A Novel PAPR Reduction Scheme for Polar-Coded OFDM Systems," IEEE Communications Letters, vol. 23, no. 12, pp. 2372-2375, Dec. 2019.
Y. Hama and H. Ochiai, "Performance of Polar Coded MIMO Systems with Matched-Filter Detector and Interference Cancellation," Proceedings of IEEE Global Communication Conference (GLOBECOM 2019) , Waikoloa, HI, USA, Dec. 2019.
T. Shen and H. Ochiai, "A UAV-Aided Selective Relaying with Cooperative Jammers for Secure Wireless Networks over Rician Fading Channels," Proceedings of 2019 IEEE Vehicular Technology Conference Fall (VTC2019-Fall) , Honolulu, HI, USA, Sep. 2019.
S. Takizawa and H. Ochiai, "PAPR reduction of OFDM with trellis shaping based on p-norm minimization," IEEE Wireless Communications Letters, vol. 8, no. 4, pp. 988-991, Aug. 2019.
Y. Hama and H. Ochiai, "Performance Analysis of Matched-Filter Detector for MIMO Spatial Multiplexing over Rayleigh Fading Channels with Imperfect Channel Estimation," IEEE Transactions on Communications, vol. 67, no. 5, pp. 3220-3233, May 2019.
S. Takizawa and H. Ochiai, "Trellis Shaping Using Clipping-based Metric with Improved PAPR Reduction for OFDM Signals," Proceedings of Radio & Wireless Week (RWW2019) , Orlando, FL, USA, Jan. 2019.
T. Shen and H. Ochiai, "A UAV-Aided Data Collection for Wireless Powered Sensor Network over Rician Fading Channels," Proceedings of IEEE Consumer Communications & Networking Conference (CCNC2019) , Las Vegas, NV, USA, Jan. 2019.

2018

T. Matsumine, B. M. Kurkoski, and H. Ochiai, "Construction D Lattice Decoding and Its Application to BCH Code Lattices," Proceedings of IEEE Global Communications Conference (GLOBECOM2018) , Abu Dhabi, UAE, Dec. 2018.
T. Matsumine and H. Ochiai, "Capacity-approaching non-binary turbo codes: A hybrid design based on EXIT charts and union bounds," IEEE Access, vol. 6, pp. 70952-70963, November 2018.
K. Masukawa and H. Ochiai, "A Coded MIMO Spatial Multiplexing Approach with Low-Complexity Matched-Filter Detector and CRC-Assisted Interference Cancellation," Proceedings of IEEE Military Communications Conference (MILCOM2018) , Los Angeles, USA, Oct. 2018.
Y. Watanabe and H. Ochiai, "Exploiting variable-length padding bits for decoder performance improvement with its application to compressed video transmission," Signal Processing: Image Communication, vol. 66, pp. 66-76, August 2018.
D. Yoda and H. Ochiai, "Decision region optimization and metric-based compensation of memoryless nonlinearity for APSK systems," IEEE Transactions on Broadcasting, vol. 64, no. 2, pp. 281-292, June 2018.
Y. Hama and H. Ochiai, "Performance Comparison of Low-Complexity MIMO System with Matched-Filter Detector and Interference Cancellation," Proceedings of 25th IEEE International Conference on Telecommunications (ICT2018), Saint-Malo, France, June 2018.
T. Matsumine and H. Ochiai, "A design of non-binary turbo codes over finite fields based on Gaussian approximation and union bounds," Proceedings of 2018 IEEE Vehicular Technology Conference Spring (VTC2018-Spring), Porto, Portugal, June 2018.
T. Yokokawa and H. Ochiai, "Software defined radio implementation of SOCC-based OFDM system with low PAPR," Proceedings of 2018 IEEE Vehicular Technology Conference Spring (VTC2018-Spring), Porto, Portugal, June 2018.
T. Matsumine and H. Ochiai, "A serial concatenation of binary-input nonbinary-output convolutional code and recursive convolutional lattice code," IEEE Access, vol. 6, pp. 24809-24817, May 2018.
Y. Hori and H. Ochiai, "A new uplink multiple access based on OFDM with low PAPR, low latency, and high reliability," IEEE Transactions on Communications, vol. 66, no. 5, pp. 1996-2008, May 2018.
T. Murata and H. Ochiai, "Performance analysis of CRC codes for systematic and non-systematic polar codes with list decoding," Wireless Communications and Mobile Computing, vol. 2018, 8 pages, May 2018.
Y. Hori and H. Ochiai, "Uplink multiple access based on MIMO-OFDM with adaptive super-orthogonal convolutional codes for ultra reliable and low latency communications," Proceedings of Workshop on 5G TACNET, 2018 IEEE International Conference on Communications (ICC 2018), Kasas City, MO, May 2018.
J. Watanabe and H. Ochiai, "A new low-complexity trellis shaping design based on clipping for PAPR reduction in BICM-OFDM system," Proceedings of 2018 IEEE Wireless Communications and Networking Conference (WCNC 2018), Barcelona, Spain, April 2018.
T. Matsumine and H. Ochiai, "A new turbo coded modulation approach exploiting non-binary field," Proceedings of 2018 Radio and Wireless Symposium (RWS 2018) , pp. 72-75, Anaheim, CA, January 2018.

2017

M. Arakawa and H. Ochiai, "On throughput optimization for coded OFDM with variable cyclic prefix length," Proceedings of The 20th International Symposium on Wireless Personal Multimedia Communications (WPMC 2017), Indonesia, December 2017.
Y. Hama and H. Ochiai, "Performance analysis of matched filter detector for MIMO systems in Rayleigh fading channels," in Proceedings of IEEE Global Communications Conference (GLOBECOM 2017), Singapore, December 2017.
T. Matsumine and H. Ochiai, "Triple parallel concatenated trellis coded modulation," Proceedings of IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC2017), Montreal, QC, Canada, Oct. 2017.
H. Ochiai, “Fourth-order moment analysis of filtered single-carrier and OFDM signals,” Proceedings of 86th Vehicular Technology Conference (VTC2017-Fall), Toronto, Canada, Sep. 2017.
F. Ono, H. Ochiai, R. Miura and F. Kojima, “On spectral sharing based on power control for aerial and ground communication links,” Proceedings of 86th Vehicular Technology Conference (VTC2017-Fall), Toronto, Canada, Sep. 2017.
S. Hagihara and H. Ochiai, "An adaptive MIMO-BICM system with CRC-assisted two-stage interference cancellation," Proceedings of 2017 IEEE 18th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC 2017), Sapporo, Japan, July 2017.
T. Lee and H. Ochiai, "A new trellis shaping design for peak power reduction of SC-FDMA signals with high-order QAM," IEEE Transactions on Vehicular Technology, vol. 66, no. 6, pp. 5030-5042, June 2017.
R. Yoshizawa and H. Ochiai, “Energy Efficiency Improvement of Coded OFDM Systems Based on PAPR Reduction,” IEEE Systems Journal, vol. 11, no.2, pp717—728, June 2017.
T. Murata and H. Ochiai, “On design of CRC codes for polar codes with successive cancellation list decoding,” Proceedings of 2017 IEEE International Symposium on Information Theory (ISIT 2017), Aachen, Germany, June 2017.
V. Singh and H. Ochiai, "An efficient time switching protocol with adaptive power splitting for wireless energy harvesting relay networks," Proceedings of 2017 IEEE Vehicular Technology Conference Spring (VTC2017-Spring) Sydney, NSW, Australia, June 2017.
M. Matsuoka, R. Yoshizawa, and H. Ochiai, "Peak and average power reduction of OFDM signals based on trellis shaping with controllable region expansion," Wireless Personal Communications, vol. 93, no. 3, pp. 737-754, April 2017.
Y. Yamashita and H. Ochiai, “A classification of OFDM signals with or without DFT precoding based on high-order moment,” Proceedings of 2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN 2017), Baltimore, MD, March 2017.
R. Yoshizawa and H. Ochiai, "Trellis-assisted constellation subset selection for PAPR reduction of OFDM signals," IEEE Transactions on Vehicular Technology, vol. 66, no. 3, pp. 2183-2198, Mar. 2017.
V. Singh and H. Ochiai, "Performance analysis of the clustering-based multihop wireless energy harvesting sensor networks over symmetric and asymmetric fading channels," International Journal of Distributed Sensor Networks, vol. 13, no. 2, Februray 2017.
V. Singh and H. Ochiai, “Throughput improvement by cluster-based multihop wireless networks with energy harvesting relays” Proceedings of 2017 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet 2017), Phoenix, AZ, USA, Jan. 2017.
Y. Hori and H. Ochiai, "Performance analysis of multiuser detection and decoding for subcarrier hopping multiple access," Proceedings of 2017 14th IEEE Annual Consumer Communications & Networking Conference (CCNC 2017), Las Vegas, NV, USA, Jan. 2017.

2016

F. Ono, H. Ochiai and R. Miura, “A Wireless Relay Network Based on Unmanned Aircraft System With Rate Optimization” IEEE Transactions on Wireless Communications, vol. 15, no. 11, Nov. 2016
Y. Watanabe and H. Ochiai, "A novel design and modeling of UEP-based compressed video broadcasting with multilevel coded modulation," IEEE Transactions on Broadcasting, vol. 62, no. 3, pp. 598-609, Nov. 2016.
Y. Yamashita and H. Ochiai, “Performance of OFDM systems with adaptive DFT-precoding,” Proceedings of 2016 50th Asilomar Conference on Signals, Systems and Computers , Pacific Grove, CA, USA, Nov. 2016.
Y. Hama and H. Ochiai, “A low-complexity matched filter detector with parallel interference cancellation for massive MIMO systems” Proceedings of 2016 IEEE 12th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob 2016), New York, NY, USA, Oct. 2016.
T. Matsumine and H. Ochiai, “Punctured parallel concatenated convolutional lattice codes,” Proceedings of 2016 9th International Symposium on Turbo Codes and Iterative Information Processing (ITSC 2016), Brest, France, Sep. 2016.
J. Song and H. Ochiai, "A novel FPGA implementation of trellis shaping for PAPR reduction of OFDM signals," Proceedings of 2016 IEEE International Conference on Communications (ICC 2016), Kuala Lumpur, Malaysia, May 2016.
Y. Hori and H. Ochiai, "A design of multiuser detection and decoding for subcarrier hopping multiple access based on coded OFDM," Proceedings of 2016 IEEE International Conference on Communications (ICC 2016), Kuala Lumpur, Malaysia, May 2016.
J. Song and H. Ochiai, "Performance analysis for OFDM signals with peak cancellation," IEEE Transactions on Communications, vol. 64, no. 1, pp. 261-270, January 2016.
Y. Hori and H. Ochiai, "Performance analysis and interleaver structure optimization for short-frame BICM-OFDM systems," IEEE Transactions on Wireless Communications, vol. 15, no. 1, pp. 651-662, January 2016.

2015

H. Ochiai, "High-order moments and Gaussianity of single-carrier and OFDM signals," IEEE Transactions on Communications, vol. 63, no. 12, pp. 4964-4976, December 2015.
D. Yoda and H. Ochiai, "Multilevel coded modulation with reduced latency decoding based on novel set partitioning for APSK," IEEE Transactions on Broadcasting, vol. 61, no. 4, pp. 674-684, December 2015.
Y. Watanabe and H. Ochiai, "Exploiting padding bits for improvement of channel decoder performance," in Proceedings of IEEE Global Communications Conference (GLOBECOM 2015), San Diego, CA, December 2015.
R. Yoshizawa and H. Ochiai, "Mutual information and coded BER analysis of PAPR reduced OFDM system with active constellation extension," in Proceedings of IEEE Global Communications Conference (GLOBECOM 2015), San Diego, CA, December 2015.
Y. Hori and H. Ochiai, "A low PAPR subcarrier hopping multiple access with coded OFDM for low latency wireless networks," in Proceedings of IEEE Global Communications Conference (GLOBECOM 2015), San Diego, CA, December 2015.
H. Ochiai, "High-order statistical analysis for linearly modulated signals," in Proceedings of 2015 IEEE Military Communications Conference (MILCOM'15), Tampa, FL, October 2015.
Y. Yamashita and H. Ochiai, "Performance comparison of coded OFDM with DFT-Precoding over nonlinear channels," in Proceedings of 2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB2015), Montreal, Canada, October 2015.
R. Yoshizawa and H. Ochiai, "Effect of clipping and filtering with distortionless PAPR reduction for OFDM systems," in Proceedings of 2015 IEEE Vehicular Technology Conference Fall (VTC2015-Fall), Boston, MA, September 2015.
Y. Hori and H. Ochiai, "Bit error rate analysis of convolutionally coded BICM with specific interleaver structures," Proceedings of 2015 IEEE International Conference on Communications (ICC 2015), London, UK, June 2015.
P. Mitran and H. Ochiai, "Parallel concatenated convolutional lattice codes with constrained states," IEEE Transactions on Communications, vol. 63, no. 4, pp. 1081-1090, April 2015.
J. Song and H. Ochiai, "A low-complexity peak cancellation scheme and its FPGA implementation for peak-to-average power ratio reduction," EURASIP Journal on Wireless Communications and Networking, vol. 2015, March 2015.
R. Yoshizawa and H. Ochiai, "Theoretical error rate analysis of trellis shaped M-QAM constellations," in Proceedings of The 2015 IEEE Wireless Communications and Networking Conference (WCNC 2015), New Orleans, LA, March 2015.
R. Yoshizawa and H. Ochiai, "A trellis shaping for peak and average power reduction of BICM-OFDM Signals", IEEE Transactions on Wireless Communications, vol. 14, no. 2, pp. 1143-1154, February 2015.

2014

Y. Watanabe and H. Ochiai, "An optimal code rate design of multilevel coded modulation for multimedia data transmission employing unequal error protection," in Proceedings of IEEE Global Communications Conference (GLOBECOM 2014) , Austin, TX, December 2014.
D. Yoda and H. Ochiai, "Distortion modeling and analysis for multilevel coded APSK with memoryless nonlinearity", in Proceedings of IEEE Global Communications Conference (GLOBECOM 2014) , Austin, TX, December 2014.
T. Lee and H. Ochiai "Characterization of power spectral density for nonlinearly amplified OFDM signals based on cross-correlation coefficient", EURASIP Journal on Wireless Communications and Networking, vol. 2014, November 2014.
J. Song and H. Ochiai, "FPGA implementation of peak cancellation for PAPR reduction of OFDM signals," in Proceedings of 2014 IEEE International Conference on Communication Systems (ICCS 2014), Macau, November 2014.
K. Ikeda, F. Ono, H. Ochiai, and R. Miura, "A virtual MIMO relay system with unmanned aircraft and multiple ground stations", in Proceedings of 2014 IEEE Vehicular Technology Conference Fall (VTC2014-Fall), Vancouver, BC, Canada, September 2014.
R. Yoshizawa and H. Ochiai, "A novel trellis-based PAPR reduction technique for OFDM signals", in Proceedings of The 2014 IEEE International Symposium on Information Theory (ISIT 2014), pp. 1563-1567, Honolulu, HI, June 2014.
J. Song and H. Ochiai, "Amplifier efficiency and distortion trade-off of OFDM system with iterative clipping and filtering", in Proceedings of The 2014 IEEE Wireless Communications and Networking Conference (WCNC 2014), Istanbul, Turkey, April 2014.
Y. Hori and H. Ochiai, "An interleaver optimization for BICM-OFDM with convolutional codes over frequency-selective block fading channels", in Proceedings of The 2014 IEEE Wireless Communications and Networking Conference (WCNC 2014), Istanbul, Turkey, April 2014.
T. Lee and H. Ochiai, "A simple characterization of power spectral density for nonlinearly amplified OFDM signals," in Proceedings of Power Amplifiers for Radio and Wireless Applications (PAWR) Conference, 2014 Radio and Wireless Week (RWW 2014) , Newport Beach, CA, January 2014.

2013

F. Ono, H. Ochiai, K. Takizawa, M. Suzuki, and R. Miura, "Performance analysis of wireless relay network using network coding and UAS", in Proceedings of 4th International Workshop on Wireless Networking and Control for Unmanned Autonomous Vehicles, IEEE Global Communications Conference (GLOBECOM 2013) , Atlanta, GA, December 2013.
R. Miyauchi and H. Ochiai, "Classification of M-ary QAM based on instantaneous power moment with adjustable median", in Proceedings of 2013 IEEE Military Communications Conference (MILCOM'13), pp. 52-57, San Diego, CA, November 2013.
R. Yoshizawa and H. Ochiai, "Performance comparison of uncoded OFDM systems with trellis shaping over nonlinear channels," Wireless Personal Communications, vol. 72, no. 3, pp. 1603-1617, October 2013.
R. Yoshizawa and H. Ochiai, "Analysis and optimization of trellis shaping concatenated with bit-interleaved coded modulation," in Proceedings of 2013 IEEE Vehicular Technology Conference Fall (VTC2013-Fall), Las Vegas, NV, September 2013.
H. Ochiai, "Statistical distributions of instantaneous power and peak-to-average power ratio for single-carrier FDMA systems," invited paper, Physical Communication, vol. 8, pp. 47-55, September 2013.
H. Ochiai, "On modulation selection for energy-efficient band-limited communication systems," in Proceedings of The 10th International Symposium on Wireless Communication Systems (ISWCS 2013), Ilmenau, Germany, August 2013.
F. Ono, T. Muramatsu, H. Ochiai, and R. Miura, "A signal constellation design for STBC with spatial and temporal modulation," in Proceedings of The 10th International Symposium on Wireless Communication Systems (ISWCS 2013), Ilmenau, Germany, August 2013.
D. Yoda and H. Ochiai, "A reduced-complexity multilevel coded modulation for APSK signaling," in Proceedings of The 2013 IEEE International Symposium on Information Theory (ISIT 2013), pp. 1994-1998, Istanbul, Turkey, July 2013.
M. Matsuoka, R. Yoshizawa, and H. Ochiai, "Improvement of peak and average power reduction of trellis shaped OFDM signals by controllable region expansion," in Proceedings of The 16th International Symposium on Wireless Personal Multimedia Communications (WPMC 2013), Atlantic City, NJ, June 2013.
T. Tsubaki and H. Ochiai, "A new candidate adding algorithm for coded MIMO systems with fixed-complexity detection," Proceedings of 2013 IEEE International Conference on Communications (ICC 2013), pp. 4525-4529, Budapest, Hungary, June 2013.
K. Ishibashi, W. Y. Shin, H. Ochiai, and V. Tarokh, "A peak power efficient cooperative diversity using star-QAM with coherent/noncoherent detection," IEEE Transactions on Wireless Communications, vol. 12, no. 5, pp. 2137-2147, May 2013.
H. Ochiai, "An analysis of band-limited communication systems from amplifier efficiency and distortion perspective," IEEE Transactions on Communications, vol. 61, no. 4, pp. 1460-1472, April 2013.
M. Tanahashi and H. Ochiai, "Power-reductive precoding for the transmission of correlated information sequences," IEEE Transactions on Communications, vol. 61, no. 4, pp. 1393-1403, April 2013.

2012

T. Lee and H. Ochiai, "Peak power reduction of SC-FDMA signals based on trellis shaping," in Proceedings of IEEE Global Communications Conference (GLOBECOM 2012) , Anaheim, CA, December 2012.
K. Kinoshita and H. Ochiai, "Energy minimization of wireless sensor networks based on modulation and coding optimization under finite frame length constraint," in Proceedings of 2012 IEEE Military Communications Conference (MILCOM'12), Orlando, FL, October 2012.
T. Muramatsu, F. Ono, H. Ochiai, and R. Miura, "A space-time block code with temporal and spatial modulation," Proceedings of The 15th International Symposium on Wireless Personal Multimedia Communications (WPMC 2012), Taipei, Taiwan, September 2012.
S. Mukai, F. Ono, H. Ochiai, and R. Miura, "Adaptive One-Way and Two-Way Relaying for MIMO Relay Networks," Proceedings of The 15th International Symposium on Wireless Personal Multimedia Communications (WPMC 2012), Taipei, Taiwan, September 2012.
K. Ishibashi, H. Ochiai, and V. Tarokh, "Energy harvesting cooperative communications," in Proceedings of 2012 IEEE 23rd International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC 2012), Sydney, Australia, September 2012.
Y. Nishino and H. Ochiai, "Comparison of coded modulations for trellis-shaped single-carrier PSK with PAPR reduction," in Proceedings of 2012 IEEE Vehicular Technology Conference Fall (VTC2012-Fall), Quebec City, Canada, September 2012.
R. Yoshizawa and H. Ochiai, "A serial concatenation of coding and trellis shaping for OFDM systems with peak power reduction," in Proceedings of The 2012 IEEE International Symposium on Information Theory (ISIT 2012), MIT, MA, July 2012.
S. Tanaka and H. Ochiai, "Further complexity reduction of MIMO PSK signal detection based on symbol distribution approximation," in Proceedings of 2012 IEEE International Conference on Communications (ICC 2012), Ottawa, June 2012.
T. Ferrett, H. Ochiai, and M. C. Valenti, "Physical-layer network coding using FSK modulation under frequency offset," in Proceedings of 2012 IEEE Vehicular Technology Conference Spring (VTC2012-Spring), Yokohama, May 2012.
H. Ochiai, "Peak-to-average power ratio distribution analysis of single-carrier FDMA signals," invited session presentation, in 18th Proceedings of European Wireless Conference (EW 2012), Poznan, Poland, April 2012.
H. Ochiai, "On instantaneous power distributions of single-carrier FDMA signals," IEEE Wireless Communications Letters, vol. 1, no. 2, pp. 73-76, April 2012.
K. Ishibashi and H. Ochiai, "Analysis of instantaneous power distributions for non-regenerative and regenerative relaying signals," IEEE Transactions on Wireless Communications, vol. 11, no. 1, pp. 258-265, January 2012.

2011

K. Ishibashi, W. Shin, H. Yi, and H. Ochiai, "A peak power efficient cooperative diversity using star-QAM," in Proceedings of 7th IEEE Broadband Wireless Access Workshop (BWA), IEEE Global Communications Conference (GLOBECOM 2011) , Houston, TX, December 2011.
K. Ishii, K. Ishibashi, and H. Ochiai, "Multilevel coded cooperation for multiple sources," IEEE Transactions on Wireless Communications, vol. 10, no. 12, pp. 4258-4269, December 2011.
M. Tanahashi and H. Ochiai, "A new reduced-complexity conditional-mean based MIMO signal detection using symbol distribution approximation technique," IEEE Transactions on Signal Processing, vol. 59, no. 11, pp. 5644-5651, November 2011.
H. Ochiai, "On power amplifier efficiencies of linearly modulated signals with nonlinear distortion," in Proceedings of The 8th International Symposium on Wireless Communication Systems (ISWCS 2011), Aachen, Germany, November 2011.
R. Yoshizawa and H. Ochiai, "Performance comparison of trellis-shaped OFDM systems over nonlinear channels," in Proceedings of The 14th International Symposium on Wireless Personal Multimedia Communications (WPMC 2011), Brest, France, October 2011.
F. Costa, B. Faria, F. Filho, and H. Ochiai, "Physical layer energy optimization analysis for fixed bandwidth wireless sensor networks", in Proceedings of The 14th International Symposium on Wireless Personal Multimedia Communications (WPMC 2011), Brest, France, October 2011.
R. Yoshizawa and H. Ochiai, "Peak power reduction of OFDM signals using trellis shaping with M-algorithm," in Proceedings of 1st Workshop on Flexibility in Broadband Wireless Access Network (FlexBWAN), The 20th IEEE International Conference on Computer Communications Networks (ICCCN 2011), Maui, HI, August 2011.
K. Ishibashi and H. Ochiai, "Performance analysis of amplify and forward cooperation over peak-power limited channel," in Proceedings of 2011 IEEE International Conference on Communications (ICC 2011), Kyoto, Japan, June 2011.
F. M. Costa and H. Ochiai, "Energy-efficient physical layer design for wireless sensor network links," in Proceedings of 2011 IEEE International Conference on Communications (ICC 2011), Kyoto, Japan, June 2011.
T. Lee and H. Ochiai, "On limitation of clipping and filtering in IEEE 802.11g based wireless LAN system," in Proceedings of The 12th annual IEEE Wireless and Microwave Technology Conference (WAMICON 2011), Clearwater, FL, April 2011.
H. Ochiai, "Exact and approximate distributions of instantaneous power for pulse-shaped single-carrier signals," IEEE Transactions on Wireless Communications, vol. 10, no. 2, pp. 682-692, February 2011.
K. Ishibashi, K. Ishii, and H. Ochiai, "Dynamic coded cooperation using multiple turbo codes in wireless relay networks," IEEE Journal of Selected Topics in Signal Processing, vol. 5, no. 1, pp.197-207, February 2011.
K. Ishii, K. Ishibashi, and H. Ochiai, "Multiple-access relay system based on nested distributed turbo code," in Proceedings of The 2011 IEEE Radio and Wireless Symposium (RWS 2011), pp. 38-41, Phoenix, AZ, January 2011.

2010

F. M. Costa and H. Ochiai, "A comparison of modulations for energy optimization in wireless sensor network links," in Proceedings of The 2010 IEEE Global Telecommunications Conference (GLOBECOM 2010), Miami, December 2010.
H. Ochiai, "An approximate distribution of instantaneous power in band-limited PSK signals," in Proceedings of The 2010 IEEE Global Telecommunications Conference (GLOBECOM 2010), Miami, December 2010.
H. Ochiai, "Effectiveness of peak power reduction schemes for OFDM and single-carrier systems (invited talk)" Presented at the Workshop on Broadband Single Carrier and Frequency Domain Communications, The 2010 IEEE Global Telecommunications Conference (GLOBECOM 2010), Miami, December 2010.
T. Aoki, H. Ochiai, and R. Kohno, "Combined trellis precoding and error correcting codes in multi-user MIMO-OFDM systems," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol.E93-A, no. 12, pp. 2663-2671, December 2010.
M. Tanahashi and H. Ochiai, "Symbol insertion: A low-complexity joint peak power reduction and forward error correction for single-carrier systems," IEEE Transactions on Communications, vol. 58, no. 11, pp. 3244-3253, November 2010.
Y. Nishino, M. Tanahashi, and H. Ochiai, "A new bit-labeling for trellis-shaped PSK with improved PAPR reduction capability," in Proceedings of 2010 International Symposium on Information Theory and its Applications / International Symposium on Spread Spectrum and its Applications (ISITA2010/ISSSTA2010), Taichung, Taiwan, October 2010.
Y. Nishino, M. Tanahashi, and H. Ochiai, "A bit-labeling design for trellis-shaped single-carrier PSK with PAPR reduction ," EURASIP Journal on Advances in Signal Processing, vol. 2011 (available online on September 30, 2010).
K. Enokizono and H. Ochiai, "A simple interleaver design for variable-length turbo codes," in Proceedings of The 6th International Symposium on Turbo Codes & Iterative Information Processing (ISTC 2010), Brest, France, September 2010.
T. Lee and H. Ochiai, "Experimental analysis of clipping and filtering effects on OFDM systems," in Proceedings of The 2010 IEEE International Conference on Communications (ICC 2010), Cape Town, South Africa, May 2010.
K. Ishibashi, K. Ishii, and H. Ochiai, "Dynamic turbo coded cooperation with simple power detection," in Proceedings of The 2010 IEEE International Conference on Communications (ICC 2010), Cape Town, South Africa, May 2010.
F. M. Costa and H. Ochiai, "Energy optimization for reliable point-to-point communication in energy-constrained networks," in Proceedings of 2010 IEEE 71st Vehicular Technology Conference Spring (VTC2010-Spring), Taipei, Taiwan, May 2010.
M. Tanahashi and H. Ochiai, "On the distribution of instantaneous power in single-carrier signals," IEEE Transactions on Wireless Communications, vol. 9, no. 3, pp. 1207-1215, March 2010.
M. Tanahashi and H. Ochiai, "Turbo decoding of concatenated channel coding and trellis shaping for peak power controlled single-carrier systems," IEEE Transactions on Communications, vol. 58, no. 1, pp. 9-15, January 2010.

2009

M. Tanahashi and H. Ochiai, "Analysis and efficient computation of instantaneous power distribution of single-carrier signals," in Proceedings of The 2009 IEEE Global Telecommunications Conference (GLOBECOM 2009), Hawaii, December 2009.
M. Tanahashi and H. Ochiai, "A multilevel coded modulation approach for hexagonal signal constellation," IEEE Transactions on Wireless Communications, vol. 8, no. 10, pp. 4993-4997, October 2009.
K. Ishibashi, K. Ishii, and H. Ochiai, "Bit-interleaved coded DPSK with cyclic delay diversity: Design and analysis," IEEE Transactions on Wireless Communications, vol. 8, no. 9, pp. 4762-4772, September 2009.
M. Iki, M. Tanahashi, and H. Ochiai, "Peak power reduction of single-carrier signals using trellis shaping with M and stack algorithms," in Proceedings of 2009 IEEE 70th Vehicular Technology Conference Fall (VTC2009-Fall), Anchorage, Alaska, September 2009.
M. Tanahashi and H. Ochiai, "Improving error rate performance of correlated sources by non-root-Nyquist pulse shaping," in Proceedings of 2009 IEEE 70th Vehicular Technology Conference Fall (VTC2009-Fall), Anchorage, Alaska, September 2009.
K. Ishibashi, K. Ishii, and H. Ochiai, "Design of adaptive coded cooperation using rate compatible turbo codes," in Proceedings of 2009 IEEE 70th Vehicular Technology Conference Fall (VTC2009-Fall), Anchorage, Alaska, September 2009.
S. Nakata, M. Tanahashi, and H. Ochiai, "On the performance of cooperative communications with constellation rearrangement," in Proceedings of The 12th International Symposium on Wireless Personal Multimedia Communications (WPMC 2009), Sendai, Japan, September 2009.
H. Ochiai, "Some practical considerations for peak power reduction of OFDM systems (invited paper)," in Proceedings of The 12th International Symposium on Wireless Personal Multimedia Communications (WPMC 2009), Sendai, Japan, September 2009.
M. Tanahashi and H. Ochiai, "On destructive superposition of shaping pulses in band-limited linear modulation systems," in Proceedings of The 2009 IEEE International Symposium on Information Theory (ISIT 2009), Seoul, Korea, June 2009.
H. Kitagawa, M. Tanahashi, and H. Ochiai, "FPGA implementation of trellis shaping to control peak power for PSK signals," in Proceedings of The 2009 IEEE International Conference on Communications (ICC 2009), Dresden, Germany, June 2009.
K. Ishii, K. Ishibashi, and H. Ochiai, "A novel cooperative diversity based on multilevel coded modulation," in Proceedings of The 2009 IEEE International Conference on Communications (ICC 2009), Dresden, Germany, June 2009.
M. Tanahashi and H. Ochiai, "Trellis shaping for controlling envelope of single-carrier high-order QAM signals," IEEE Journal of Selected Topics in Signal Processing, vol. 3, no. 3, pp. 430-437, June 2009.
H. Ochiai and Y. Takayama, "A simple OFDM-Based multiple access system with super-orthogonal convolutional codes and Golay sequence," in Proceedings of The 2009 IEEE Wireless Communications and Networking Conference (WCNC 2009), Budapest, Hungary, April 2009.
M. Tanahashi and H. Ochiai, "Near constant envelope trellis shaping for PSK signaling," IEEE Transactions on Communications, vol. 57, no. 2, pp. 450-458, February 2009.

2008

T. Uchino and H. Ochiai, "On the performance of clipping noise cancellation for OFDM systems with high-order coded modulation," in Proceedings of The 2008 International Symposium on Information Theory and its Applications (ISITA 2008), Auckland, New Zealand, December 2008.
M. Tanahashi and H. Ochiai, "Noncoherent iterative decoding of symbol insertion systems," in Proceedings of The 2008 International Symposium on Information Theory and its Applications (ISITA 2008), Auckland, New Zealand, December 2008.
K. Ishibashi, K. Ishii, and H. Ochiai, "Collaborative diversity enhancements using rate-compatible turbo codes," in Proceedings of The 2008 International Symposium on Information Theory and its Applications (ISITA 2008), Auckland, New Zealand, December 2008.
K. Ishii, K. Ishibashi, and H. Ochiai, "Multilevel coded cooperation: Concepts and design criteria," in Proceedings of The 2008 International Symposium on Information Theory and its Applications (ISITA 2008), Auckland, New Zealand, December 2008.
K. Ishibashi, K. Ishii, and H. Ochiai, "Diversity order analysis of bit-interleaved coded DPSK with cyclic delay diversity," in Proceedings of The 2008 IEEE Global Telecommunications Conference (GLOBECOM 2008), New Orleans, December 2008.
M. Tanahashi and H. Ochiai, "Trellis shaping with flexible control of peak and average power for single-carrier high-order QAM," in Proceedings of The 2008 IEEE Global Telecommunications Conference (GLOBECOM 2008), New Orleans, December 2008.
T. Tamagawa and H. Ochiai, "An efficient hybrid ARQ system using multilevel coded modulation with reduced constellation size," in Proceedings of The 2008 IEEE Global Telecommunications Conference (GLOBECOM 2008), New Orleans, December 2008.
M. Tanahashi and H. Ochiai, "A simple modulation code with peak power reduction and coding gain," in Proceedings of The 2008 IEEE International Conference on Communications (ICC 2008), Beijing, China, May 2008.
K. Ishibashi, H. Ochiai, and R. Kohno, "Embedded forward error control technique (EFECT) for low-rate but low latency communications," IEEE Transactions on Wireless Communications, vol. 7, pp. 1456-1460, May 2008.
H. Kitagawa, M. Tanahashi, and H. Ochiai, "FPGA implementation of trellis shaping PSK system with low peak-to-average power ratio," in Proceedings of The 2008 IEEE Sarnoff Symposium, Princeton, April 2008.

2007

M. Tanahashi and H. Ochiai, "Iterative decoding of concatenated channel coding and trellis shaping based on Markov model," in Proceedings of The 2007 IEEE Global Telecommunications Conference (GLOBECOM 2007), pp. 3905-3909, Washington D.C., November 2007.
K. Ishibashi, H. Ochiai, and R. Kohno, "Embedded forward error control technique (EFECT) for low-rate real-time communications," in Proceedings of The 2007 IEEE Global Telecommunications Conference (GLOBECOM 2007), pp. 4565-4569, Washington D.C., November 2007.
K. Ishibashi, H. Ochiai, and R. Kohno, "Low complexity bit-interleaved coded DAPSK with cyclic delay diversity," in Proceedings of the IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2007), pp. 1-5, Athens, Greece, September 2007.
M. Tanahashi and H. Ochiai, "A new trellis shaping approach for pulse-shaped PSK signals with almost constant envelope," in Proceedings of The 2007 IEEE International Conference on Communications (ICC 2007), pp. 5598 - 5603, Glasgow, Scotland, June 2007. download
T. Masakawa and H. Ochiai, "Design of Reed-Solomon codes for OFDM systems with clipping and filtering," in Proceedings of The 2007 IEEE Wireless Communications & Networking Congerence (WCNC 2007), pp. 1361-1366, Hong Kong, March 2007.

2006

M. Tanahashi and H. Ochiai, "A new trellis shaping design for peak power reduction of single-carrier QAM signals," in Proceedings of The 2006 International Symposium on Information Theory and its Applications (ISITA 2006), pp. 81-86, Seoul, Korea, October 2006.
K. Hiwatashi, H. Ochiai, and J. Shikata, "A new secret key agreement scheme based on eigenvalues of channel matrices in phase-controlled MIMO systems," in Proceedings of The 2006 International Symposium on Information Theory and its Applications (ISITA 2006), pp. 265-270, Seoul, Korea, October 2006.
H. Ochiai, P. Mitran, and V. Tarokh, "Variable-rate two-phase collaborative communication protocols for wireless networks," IEEE Transactions on Information Theory, vol. 52, no. 9, pp. 4299-4313, September 2006.
H. Ochiai, "Amplifier efficiencies of OFDM systems with peak power and envelope variance reduction," in Proceedings of The 6th IEEE International Symposium on Signal Processing and Information Technology (ISSPIT 2006), pp. 828 - 833, Vancouver, Canada, August 2006.
H. Tatsunami, K. Ishibashi, and H. Ochiai, "On the performance of LDPC codes with differential detection over Rayleigh fading channels," in Proceedings of 2006 IEEE 63rd Vehicular Technology Conference (VTC '06 Spring), pp. 2388-2392, Melbourne, Australia, May 2006.

2005

H. Ochiai, P. Mitran, H. V. Poor, and V. Tarokh, "Collaborative beamforming for distributed wireless ad hoc sensor networks ," IEEE Transactions on Signal Processing, vol. 53, no. 11, pp. 4110-4124, November 2005.
K. Ishibashi, H. Ochiai, and R. Kohno, "Low complexity bit-interleaved coded DAPSK for Rayleigh fading channels ," IEEE Journal on Selected Areas in Communications, Special Issue on Differential and Noncoherent Wireless Communications, vol. 23, no. 9, pp. 1728-1738, September 2005.
P. Mitran, H. Ochiai, and V. Tarokh, "Space-time diversity enhancements using collaborative communications ," IEEE Transactions on Information Theory, vol. 51, no. 6, pp. 2041-2057, June 2005.
P. Mitran, H. Ochiai, and V. Tarokh, "Collaborative diversity enhancements for wireless communications," in Proceedings of 2005 IEEE International Conference on Communications (ICC 2005), pp. 2437-2441, Seoul, Korea, May 2005.
H. Ochiai, P. Mitran, H. V. Poor, and V. Tarokh, "On the effects of phase estimation errors on collaborative beamforming in wireless ad hoc networks," in Proceedings of 2005 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2005), vol. 3, pp. 657-660, Philadelphia, PA, March 2005.