| Presentation | 2020-11-25 Investigation of Preamble Design Appropriate for Random Access Achieving Multi-Packet Reception Kou Watanuki, Kenichi Higuchi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Random access for multi-packet reception is considered to be an promising technology component for the 5th generation mobile communication system and beyond for actualizing the massive machine-type communications (mMTC) and ultra-reliable low latency communications (URLLC). The system prepares multiple channel identifiers for signal separation of multiple user packet signals at the base station receiver and the user randomly selects the channel identifier to be used. When the multiple users select the same channel identifier, a packet loss occurs due to the collision of the channel identifier. To suppress this packet loss, the system needs to be prepare sufficient number of channel identifiers compared to the expected number of simultaneously transmitting users. The base station receiver performs user detection and channel estimation using the preamble sequences, each of which has a one-to-one relationship with the channel identifier. As the number of the channel identifiers prepared in the system, the computational complexity for the user detection and channel estimation becomes prohibitive. To address the problem, we propose a preamble sequence design appropriate for the random access achieving multi-packet reception. Assuming the single-carrier transmission based on the DFT-Spread OFDM, the proposed method constructs the preamble sequence by repetition of the basic Zadoff-Chu (ZC) sequence, which is shorter than the length of one DFT block, with multiplication of the orthogonal masking sequence. Computer simulation results show the effectiveness of the proposed method quantitatively. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Random access / multi-packet reception / preamble / user detection / channel estimation |
| Paper # | RCS2020-113 |
| Date of Issue | 2020-11-18 (RCS) |
| Conference Information | |
| Committee | RCS / AP |
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| Conference Date | 2020/11/25(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Adaptive Antenna, Equalization, Interference Canceler, MIMO, Wireless Communications, etc. |
| Chair | Eiji Okamoto(Nagoya Inst. of Tech.) / Qiang Chen(Tohoku Univ.) |
| Vice Chair | Fumiaki Maehara(Waseda Univ.) / Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Satoru Kurokawa(AIST) |
| Secretary | Fumiaki Maehara(Kyushu Univ.) / Toshihiko Nishimura(NEC) / Tomoya Tandai(Tokyo Univ. of Agric. & Tech.) / Satoru Kurokawa(NTT DOCOMO) |
| Assistant | Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) / Dr. Kim(Niigata Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems / Technical Committee on Antennas and Propagation |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Investigation of Preamble Design Appropriate for Random Access Achieving Multi-Packet Reception |
| Sub Title (in English) | |
| Keyword(1) | Random access |
| Keyword(2) | multi-packet reception |
| Keyword(3) | preamble |
| Keyword(4) | user detection |
| Keyword(5) | channel estimation |
| 1st Author's Name | Kou Watanuki |
| 1st Author's Affiliation | Tokyo University of Science(Tokyo Univ. of Science) |
| 2nd Author's Name | Kenichi Higuchi |
| 2nd Author's Affiliation | Tokyo University of Science(Tokyo Univ. of Science) |
| Date | 2020-11-25 |
| Paper # | RCS2020-113 |
| Volume (vol) | vol.120 |
| Number (no) | RCS-249 |
| Page | pp.pp.17-23(RCS), |
| #Pages | 7 |
| Date of Issue | 2020-11-18 (RCS) |