| Presentation | 2021-06-24 Reduction of Out-of-Band Radiation with Quantized Precoding using Gibbs Sampling in Massive MU-MIMO-OFDM Taichi Yamakado, Riki Okawa, Yukithoshi Sanada, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, a non-linear precoding algorithm with low out-of-band (OOB) radiation in a Massive multiple-input multiple-output (MIMO) system is proposed. Full digital Massive MIMO may require lower resolution in digital-to-analogue converters (DACs) since each DAC consumes a large amount of power. In Massive MIMO systems with low resolution DACs, an output signal designed by nonlinear processing has been investigated. The conventional scheme focuses only on a sum rate or errors in received signals and causes large OOB radiation. This paper proposes an optimization criterion that takes OOB radiation power into account. Gibbs sampling is used as an algorithm to find for a sub-optimal solution for this criterion. Numerical results obtained through computer simulation show that the proposed criterion reduces mean OOB radiation power by a factor of 10 as compared with the conventional criteria. Furthermore, the proposed criterion achieves approximately 1.3 times larger performance in the average sum rate than an error based criterion. On the other hand, as compared with a sum rate based criterion, the throughput on each subcarrier shows less variation and that demands a smaller number of link adaptation options although the average sum rate of the proposed criterion is smaller. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Massive MIMO / Low Resolution DACs / Gibbs Sampling / Non-Linear Precoding |
| Paper # | RCS2021-49 |
| Date of Issue | 2021-06-16 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2021/6/23(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | First Presentation in IEICE Technical Committee, Resource Control, Scheduling, Wireless Communications, etc. |
| Chair | Eiji Okamoto(Nagoya Inst. of Tech.) |
| Vice Chair | Fumihide Kojima(NICT) / Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) |
| Secretary | Fumihide Kojima(Panasonic) / Toshihiko Nishimura(NEC) / Tomoya Tandai |
| Assistant | Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) |
| Paper Information | |
| Registration To | 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) | Reduction of Out-of-Band Radiation with Quantized Precoding using Gibbs Sampling in Massive MU-MIMO-OFDM |
| Sub Title (in English) | |
| Keyword(1) | Massive MIMO |
| Keyword(2) | Low Resolution DACs |
| Keyword(3) | Gibbs Sampling |
| Keyword(4) | Non-Linear Precoding |
| 1st Author's Name | Taichi Yamakado |
| 1st Author's Affiliation | Keio University(Keio Univ.) |
| 2nd Author's Name | Riki Okawa |
| 2nd Author's Affiliation | Keio University(Keio Univ.) |
| 3rd Author's Name | Yukithoshi Sanada |
| 3rd Author's Affiliation | Keio University(Keio Univ.) |
| Date | 2021-06-24 |
| Paper # | RCS2021-49 |
| Volume (vol) | vol.121 |
| Number (no) | RCS-72 |
| Page | pp.pp.121-126(RCS), |
| #Pages | 6 |
| Date of Issue | 2021-06-16 (RCS) |