Invited talk at IEICE MIKA @ Hokkaido Univ.

石橋准教授は北海道大学で開催された「革新的無線通信技術に関する横断型研究会」(MIKA 2019)で、「グラントフリー非直交多元接続: モノのインターネット時代におけるランダムアクセス」という題目で招待講演を行いました。[詳細]

Accepted for Publication in the IEEE Access

Our paper entitled “Time-to-Recharge Analysis for Energy-Relay-Assisted Energy Harvesting” has been accepted for publication in the IEEE Access (IF 4.098).

サルマ教授との共著論文「Time-to-Recharge Analysis for Energy-Relay-Assisted Energy Harvesting」のIEEE Access (IF 4.098) への採録が決定しました.

Presented at IEICE RCS @ Nagoya

本研究室の原くんが名古屋大学にて開催されたIEICE RCS研究会にて発表を行いました。
発表題目は「上り回線グラントフリー非直交多元接続のための一般化ブースト近似メッセージ伝播法 」でした。[詳細]

Our member, Takanori, gave a presentation at IEICE RCS held at Nagoya University, Japan.
Title of the presentation was “Generalized Boosted Approximate Message Passing for Uplink Grant-Free Non-Orthogonal Multiple Access .”[more]

Presented at IEICE RCS @ Osaka

本研究室の飯盛くんと原くんが大阪にて開催されたIEICE RCS研究会にて発表を行いました。 [プログラム]

Our members, Hiroki and Takanori presented their recent results in IEICE RCS conference held at Osaka, Japan.

発表題目:下り電力領域 NOMA伝送のための分数計画法を用いたロバストビームフォーミング設計に関する一検討 [詳細]
Title: Robust Transmit Beamforming Design via Fractional Programming for Downlink Power-Domain NOMA Systems


Title: Boosted Approximate Message Passing for Uplink Grant-Free Non-Orthogonal Multiple Access [詳細]


Presented at IEICE RCS @ Miyakojima

本研究室の原くん、岡部くん、廣澤くんが宮古島にて開催されたIEICE RCS研究会にて発表を行いました。


Our members, Takanori, Ryo, and Naoya, have presented their recent results in IEICE RCS conference held at Miyakojima, Okinawa.
There were 52 presentations given by beginners at “Special Sessions for Beginners”, in both 10 mins oral presentation and 80 mins poster session.
In addition, 12 general and invited sessions were made.

Takanori presented at a general session, while Ryo and Naoya presented  at “Special Sessions for Beginners”.

Title: Channel Estimation and Data Detection for Grant-Free Multiple Access Using Vector Approximate Message Passing

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Title: A Study on Energy-Efficient Design of Irregular Repetition Slotted ALOHA with Stochastic Power Control


Title: A Study on Age-of-Information Minimization in Two-User Multiple Access Channel with Energy Harvesting


2018 IEICE RCS Active Research Award

Our member, Kazuya, received 2018 IEICE RCS Active Research Award. Congrats!

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Presented at WCNC

Prof. Ishibashi and our lab members attended IEEE Wireless Communications and Networking Conference (WCNC) held at Marrakesh, Morocco. [link]


Our members, Takanori, Hiroki and Ryuhei presented their recent works.

Title: On the Sum-Rate Capacity and Spectral Efficiency Gains of Massively Concurrent NOMA System

Title: Transmission Strategies in Imperfect Bi-directional Full-Duplex MIMO Systems

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Title: Design of Communication Systems for Wireless-Powered Communications with Multiple Frequency Bands



平成30年度 学生表彰


Our members, Shun, Kazuya, Tatsuhiro and Masaru were awarded for their outstanding academic performance.


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(From left to right: Shun, Masaru, Tatsuhiro, Kazuya)

Accepted for Publication in the IEEE Access

Shun’s paper entitled “Application of ZigZag Decoding in Frameless ALOHA” has been accepted for publication in the IEEE Access (IF 3.557). Congrats.

尾形くんの論文「Application of ZigZag Decoding in Frameless ALOHA」のIEEE Access (IF 3.557) への採録が決定しました.おめでとうございます.