| Presentation | 2019-12-19 A Study on Active User Detection and Channel Estimation for Grant-Free Non-Orthogonal Multiple Access based on OFDM Takanori Hara, Koji Ishibashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | As a scheme to accommodate a large number of users efficiently, the grant-free non-orthogonal multiple access (GF-NOMA) based on multiple measurement vector approximate message passing (MMV-AMP), has been proposed. This scheme can efficiently perform active user detection (AUD), channel estimation (CE), and data detection by exploiting multiple measurements. However, the scheme cannot detect the transmitted data correctly when the channels vary in the duration of the transmission since the pilot and data symbols are transmitted with multiplying the spreading sequence. In this paper, we consider GF-NOMA systems exploiting orthogonal frequency division multiplexing (OFDM). We also propose a scheme to perform AUD and CE using multiple sabcarriers. Furthermore, we show that our proposal can attain superior performance via computer simulations. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Grant-free non-orthogonal multiple access / active user detection / compressed sensing / approximate message passing |
| Paper # | RCS2019-237 |
| Date of Issue | 2019-12-12 (RCS) |
| Conference Information | |
| Committee | NS / RCS |
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| Conference Date | 2019/12/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Memorial Hall of Alumni(Engineering), Tokushima Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Multi-hop/Relay/Cooperation, Disaster-resistant wireless network, Sensor/Mesh network, Ad-hoc network, D2D/M2M, Wireless network coding, Handover/AP switching/Connected cell control/Load balancing among base stations/Mobile network dynamic reconfiguration, QoS/QoE assurance, Wireless VoIP, IoT, Edge computing, etc. |
| Chair | Yoshikatsu Okazaki(NTT) / Tomoaki Otsuki(Keio Univ.) |
| Vice Chair | Akihiro Nakao(Univ. of Tokyo) / Satoshi Suyama(NTT DoCoMo) / Fumiaki Maehara(Waseda Univ.) / Toshihiko Nishimura(Hokkaido Univ.) |
| Secretary | Akihiro Nakao(Osaka Pref Univ.) / Satoshi Suyama(NTT) / Fumiaki Maehara(NTT) / Toshihiko Nishimura(Kyushu Univ.) |
| Assistant | Shinya Kawano(NTT) / Kazushi Muraoka(NEC) / Shinsuke Ibi(Doshisha Univ.) / Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) |
| Paper Information | |
| Registration To | Technical Committee on Network Systems / Technical Committee on Radio Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Active User Detection and Channel Estimation for Grant-Free Non-Orthogonal Multiple Access based on OFDM |
| Sub Title (in English) | |
| Keyword(1) | Grant-free non-orthogonal multiple access |
| Keyword(2) | active user detection |
| Keyword(3) | compressed sensing |
| Keyword(4) | approximate message passing |
| 1st Author's Name | Takanori Hara |
| 1st Author's Affiliation | The University of Electro-Communications(The Univ. of Electro-Communications) |
| 2nd Author's Name | Koji Ishibashi |
| 2nd Author's Affiliation | The University of Electro-Communications(The Univ. of Electro-Communications) |
| Date | 2019-12-19 |
| Paper # | RCS2019-237 |
| Volume (vol) | vol.119 |
| Number (no) | RCS-345 |
| Page | pp.pp.1-5(RCS), |
| #Pages | 5 |
| Date of Issue | 2019-12-12 (RCS) |