| Presentation | 2018-04-23 A Study on Iterative Channel Estimation with Non-Orthogonal Pilot Sequence in Large MIMO Detection 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) | Based on the use of iterative channel estimation with non-orthogonal pilot sequence, we proposes a modified covariance matrix on the basis of the imperfection of a temporary criterion in probabilistic data association (PDA) for large multi-user multi-input multi-output (MU-MIMO) detection. To avoid under-determined problems caused by channel estimation using insufficient non-orthogonal pilot sequence, iterative channel estimation is effective, where the temporary criterion based on iterative detection is utilized as an additional pilot sequence. However, the high level bit error ratio (BER) floor is unavoidable due to modeling errors which are caused by decision errors included in the additional pilot sequence in the previous method. For mitigating the negative effects of the modeling errors, a modified covariance matrix is designed. Finally, the validity of using the proposed method for suppressing BER floor level is confirmed by computer simulations. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | iterative channel estimation / iterative detection / non-orthogonal pilot sequence / probabilistic data association / large MIMO |
| Paper # | RCS2018-6 |
| Date of Issue | 2018-04-16 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2018/4/23(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hotel New Tanaka, Yuda Onsen |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Radio Access Technologies, etc. |
| Chair | Hidekazu Murata(Kyoto Univ.) |
| Vice Chair | Yukitoshi Sanada(Keio Univ.) / Eisuke Fukuda(Fujitsu Labs.) / Satoshi Suyama(NTT DoCoMo) |
| Secretary | Yukitoshi Sanada(Toshiba) / Eisuke Fukuda(Hokkaido Univ.) / Satoshi Suyama |
| Assistant | Tetsuya Yamamoto(Panasonic) / Koichi Ishihara(NTT) / Kazushi Muraoka(NTT DoCoMo) / Shinsuke Ibi(Osaka Univ.) / Hiroshi Nishimoto(Mitsubishi Electric) |
| 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 Iterative Channel Estimation with Non-Orthogonal Pilot Sequence in Large MIMO Detection |
| Sub Title (in English) | |
| Keyword(1) | iterative channel estimation |
| Keyword(2) | iterative detection |
| Keyword(3) | non-orthogonal pilot sequence |
| Keyword(4) | probabilistic data association |
| Keyword(5) | large MIMO |
| 1st Author's Name | Takumi Takahashi |
| 1st Author's Affiliation | Osaka University(Osaka Univ.) |
| 2nd Author's Name | Shinsuke Ibi |
| 2nd Author's Affiliation | Osaka University(Osaka Univ.) |
| 3rd Author's Name | Seiichi Sampei |
| 3rd Author's Affiliation | Osaka University(Osaka Univ.) |
| Date | 2018-04-23 |
| Paper # | RCS2018-6 |
| Volume (vol) | vol.118 |
| Number (no) | RCS-12 |
| Page | pp.pp.31-36(RCS), |
| #Pages | 6 |
| Date of Issue | 2018-04-16 (RCS) |