| Presentation | 2020-11-25 Superposition Coding-Based Non-orthogonal HARQ with Adaptive Power Allocation Using Multistage Decision Hironobu Onaya, Kenichi Higuchi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper proposes a superposition coding-based non-orthogonal hybrid automatic repeat request (HARQ) method with adaptive power allocation to the non-orthogonally multiplexed packets by instantaneous channel-dependent multi-stage decisions. In the non-orthogonal HARQ method based on super position coding, retransmission packets are multiplexed with the next initial packet to reduce the throughput loss due to the exclusive bandwidth allocation to the retransmission packets in the conventional method. However, if this method is used in a fixed manner regardless of the channel state, inter-packet interference cannot be eliminated satisfactorily under a poor instantaneous channel condition, and throughput may deteriorate. The proposed method switches the power allocation to the multiplexed packets according to the measured instantaneous channel state. In particular, when the channel state is very poor, the retransmission mode falls back into the conventional orthogonal retransmission by allocating all power to the retransmission packet, which alleviates the throughput loss. The computer simulation results show that the proposed method can improve the throughput performance compared to the cases where orthogonal or non-orthogonal retransmissions are used in a fixed manner. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Hybrid ARQ / retransmission / superposition coding |
| Paper # | RCS2020-112 |
| 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) | Superposition Coding-Based Non-orthogonal HARQ with Adaptive Power Allocation Using Multistage Decision |
| Sub Title (in English) | |
| Keyword(1) | Hybrid ARQ |
| Keyword(2) | retransmission |
| Keyword(3) | superposition coding |
| 1st Author's Name | Hironobu Onaya |
| 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 # | RCS2020-112 |
| Volume (vol) | vol.120 |
| Number (no) | RCS-249 |
| Page | pp.pp.13-16(RCS), |
| #Pages | 4 |
| Date of Issue | 2020-11-18 (RCS) |