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Ph.D. Thesis

Space-, time-, and frequency-domain permutation modulation designed for microwave and optical wireless communications

Authors: Naoki Ishikawa
Published in: Tokyo University of Agriculture and Technology Ph.D. Thesis, February 2017.
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IEEE Journal (Refereed)

Differential space-time coding dispensing with channel-estimation approaches the performance of its coherent counterpart in the open-loop massive MIMO-OFDM downlink

Authors: Naoki Ishikawa, Rakshith Rajashekar, Chao Xu, Shinya Sugiura, and Lajos Hanzo
Published in: IEEE Transactions on Communications, in press.
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Finite-cardinality single-RF differential space-time modulation for improving the diversity-throughput tradeoff

Authors: Chao Xu, Peichang Zhang, Rakshith Rajashekar, Naoki Ishikawa, Shinya Sugiura, Li Wang, and Lajos Hanzo
Published in: IEEE Transactions on Communications, in press.
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50 years of permutation, spatial and index modulation: From classic RF to visible light communications and data storage

Authors: Naoki Ishikawa, Shinya Sugiura, and Lajos Hanzo
Published in: IEEE Communications Surveys and Tutorials, vol. 20, no. 3, pp. 1905—1938, March 2018.
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Single-RF index shift keying aided differential space-time block coding

Authors: Chao Xu, Rakshith Rajashekar, Naoki Ishikawa, Shinya Sugiura, and Lajos Hanzo
Published in: IEEE Transactions on Signal Processing, vol. 66, no. 3, pp. 773—788, February 2018.
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Algebraic differential spatial modulation is capable of approaching the performance of its coherent counterpart

Authors: Rakshith Rajashekar, Chao Xu, Naoki Ishikawa, Shinya Sugiura, K. V. S. Hari, and Lajos Hanzo
Published in: IEEE Transactions on Communications, vol. 65, no. 10, pp. 4260—4273, October 2017.
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Rectangular differential spatial modulation for open-loop noncoherent massive-MIMO downlink

Authors: Naoki Ishikawa and Shinya Sugiura
Published in: IEEE Transactions on Wireless Communications, vol. 16, no. 3, pp. 1908—1920, March 2017.
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Full-diversity dispersion matrices from algebraic field extensions for differential spatial modulation

Authors: Rakshith Rajashekar, Naoki Ishikawa, Shinya Sugiura, K. V. S. Hari, and Lajos Hanzo
Published in: IEEE Transactions on Vehicular Technology, vol. 66, no. 1, pp. 385—394, January 2017.
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Subcarrier-index modulation aided OFDM — will it work?

Authors: Naoki Ishikawa, Shinya Sugiura, and Lajos Hanzo
Published in: IEEE Access, vol. 4, pp. 2580—2593, May 2016.
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Maximizing constrained capacity of power-imbalanced optical wireless MIMO communications using spatial modulation

Authors: Naoki Ishikawa and Shinya Sugiura
Published in: Journal of Lightwave Technology, vol. 33, no. 2, pp. 519—527, January 2015.
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One paper is being under review. The authors including me profoundly appreciate the reviewers' efforts to spare their precious time for reviewing our paper.

IEEE Letter (Refereed)

Generalized spatial modulation based reduced-RF-chain millimeter-wave communications

Authors: Naoki Ishikawa, Rakshith Rajashekar, Shinya Sugiura, and Lajos Hanzo
Published in: IEEE Transactions on Vehicular Technology, vol. 66, no. 1, pp. 879—883, January 2017.
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Unified differential spatial modulation

Authors: Naoki Ishikawa and Shinya Sugiura
Published in: IEEE Wireless Communications Letters, vol. 3, no. 4, pp. 337—340, August 2014.
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IEEE Conference (Oral / Refereed)

EXIT-chart-based design of irregular-precoded power-imbalanced optical spatial modulation

Authors: Naoki Ishikawa and Shinya Sugiura
Presented in: IEEE 82nd Vehicular Technology Conference (VTC Fall), Boston, USA, September 2015.
Acceptance rate: not yet public
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Single- and multiple-RF aided non-coherent generalized spatial modulation

Authors: Naoki Ishikawa and Shinya Sugiura
Presented in: IEEE 79th Vehicular Technology Conference (VTC Spring), Seoul, Korea, May 2014.
Acceptance rate: 62%
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Domestic Conference (Oral / Refereed)

個人的な小さな幸せを実現するブラウザ上での動画編集・共有手法

Authors: 中村 聡史,石川 直樹,渡邊 恵太.
Presented in: 日本ソフトウェア科学会 第21回インタラクティブシステムとソフトウェアに関するワークショップ (WISS 2013), pp. 19-24, 高知県高知市, 2013年12月4-6日.
Acceptance rate: 29%
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TimeFiller:生活を無理なくコンテンツで満たすメディアプラットフォーム

Authors: 渡邊 恵太,石川 直樹,栗原 一貴,稲見 昌彦,五十嵐 健夫.
Presented in: 日本ソフトウェア科学会 第20回インタラクティブシステムとソフトウェアに関するワークショップ (WISS 2012), pp.13-18, 青森県三沢市, 2012年12月6-8日.
Acceptance rate: 42%
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