| Presentation | 2020-11-25 A Study on Joint Channel and Data Estimation via Belief Propagation for Correlated Large MIMO Systems Kenta Ito, 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) | We propose a novel joint channel and data estimation (JCDE) scheme for correlated large multi-user multi-input multi-output (MIMO) systems with short non-orthogonal pilots. A Bayesian JCDE via scalar-wise tensor products, such as bilinear Gaussian belief propagation (BiGaBP), is able to achieve low computation cost, but its convergence property is severely degraded in the presence of spatial fading correlation. To overcome the vulnerability against this correlation, the JCDEs based on the minimum mean square error (MMSE) criterion have been proposed, but it still fails to detect MIMO signals reliably when using the non-orthogonal pilots aiming at overhead reduction. To resolve this issue, the proposed method calculates the conditional expectation of channel coefficients via a maximum a-posteriori (MAP)-like approach with the aid of the knowledge of long-term channel statistics. While the data detection is performed via probabilistic data association (PDA) to suppress the observation correlation, the channel estimation is performed via GaBP by leveraging the pseudo-orthogonality of the pilot-plus-data sequences, which makes it possible to realize low-complexity and high-accuracy JCDE. Computer simulation demonstrates the validity of our proposed method in terms of bit error rate (BER) performance. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Large MU-MIMO / belief propagation / joint channel and data estimation / non-orthogonal pilots / belief scaling |
| Paper # | RCS2020-111 |
| 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) | A Study on Joint Channel and Data Estimation via Belief Propagation for Correlated Large MIMO Systems |
| Sub Title (in English) | |
| Keyword(1) | Large MU-MIMO |
| Keyword(2) | belief propagation |
| Keyword(3) | joint channel and data estimation |
| Keyword(4) | non-orthogonal pilots |
| Keyword(5) | belief scaling |
| 1st Author's Name | Kenta Ito |
| 1st Author's Affiliation | Osaka University(Osaka Univ) |
| 2nd Author's Name | Takumi Takahashi |
| 2nd Author's Affiliation | Osaka University(Osaka Univ) |
| 3rd Author's Name | Shinsuke Ibi |
| 3rd Author's Affiliation | Doshisha University(Doshisha Univ) |
| 4th Author's Name | Seiichi Sampei |
| 4th Author's Affiliation | Osaka University(Osaka Univ) |
| Date | 2020-11-25 |
| Paper # | RCS2020-111 |
| Volume (vol) | vol.120 |
| Number (no) | RCS-249 |
| Page | pp.pp.7-12(RCS), |
| #Pages | 6 |
| Date of Issue | 2020-11-18 (RCS) |