| Presentation | 2021-06-24 A Study on Low-Complexity Large MIMO Detection Based on Beam-Domain Local LMMSE Filters Takumi Yoshida, Daichi Shirase, Takumi Takahashi, Shinsuke Ibi, Seiichi Sampei, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In large multi-input multi-output (MIMO) systems, linear minimum mean square error (LMMSE) filters are often utilized as low-complexity uplink multi-user detection (MUD).However, in large MIMO settings required to operate in high-frequency bands, the LMMSE filtering requires high-dimensional matrix inversion operations, leading to the prohibitively high computational burden.To address this issue, local LMMSE (LLMMSE) detection has been proposed, where a contiguous block of beams can be selected for each user device based on the MSE criterion, assuming digital beamforming at the base station (BS).However, the limited size of the resulting LLMMSE filter also deteriorates the detection capability owing to information loss induced by an excessive dimensionality reduction.To circumvent this issue, we propose to selectively combine the information from the overlapping LLMMSE filters in the bit log-likelihood ratio (LLR) domain.For further enhancing the detection reliability, this method is extended to iterative detection. Numerical results demonstrate the validity of our proposed method by evaluating the bit error rate (BER) performance and the computational cost. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Large MIMO detection / linear MMSE / digital beamforming / local LMMSE |
| Paper # | RCS2021-50 |
| 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) | A Study on Low-Complexity Large MIMO Detection Based on Beam-Domain Local LMMSE Filters |
| Sub Title (in English) | |
| Keyword(1) | Large MIMO detection |
| Keyword(2) | linear MMSE |
| Keyword(3) | digital beamforming |
| Keyword(4) | local LMMSE |
| 1st Author's Name | Takumi Yoshida |
| 1st Author's Affiliation | Osaka University(Osaka Univ.) |
| 2nd Author's Name | Daichi Shirase |
| 2nd Author's Affiliation | Osaka University(Osaka Univ.) |
| 3rd Author's Name | Takumi Takahashi |
| 3rd Author's Affiliation | Osaka University(Osaka Univ.) |
| 4th Author's Name | Shinsuke Ibi |
| 4th Author's Affiliation | Doshisha University(Doshisha Univ.) |
| 5th Author's Name | Seiichi Sampei |
| 5th Author's Affiliation | Osaka University(Osaka Univ.) |
| Date | 2021-06-24 |
| Paper # | RCS2021-50 |
| Volume (vol) | vol.121 |
| Number (no) | RCS-72 |
| Page | pp.pp.127-132(RCS), |
| #Pages | 6 |
| Date of Issue | 2021-06-16 (RCS) |