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| Presentation | 2020-11-25 10:15 A Study on Joint Channel and Data Estimation via Belief Propagation for Correlated Large MIMO Systems Kenta Ito, Takumi Takahashi (Osaka Univ), Shinsuke Ibi (Doshisha Univ), Seiichi Sampei (Osaka Univ)  RCS2020-111 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (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) |
| (in English) | Large MU-MIMO / belief propagation / joint channel and data estimation / non-orthogonal pilots / belief scaling / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 120, no. 249, RCS2020-111, pp. 7-12, Nov. 2020. | |
| Paper # | RCS2020-111 | |
| Date of Issue | 2020-11-18 (RCS) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | RCS2020-111 |
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| Conference Information | |
| Committee | RCS AP UWT |
| Conference Date | 2020-11-25 - 2020-11-27 |
| 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. |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2020-11-RCS-AP-UWT |
| Language | Japanese |
| 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 |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 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) |
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| Speaker | Author-1 |
| Date Time | 2020-11-25 10:15:00 |
| Presentation Time | 25 minutes |
| Registration for | RCS |
| Paper # | RCS2020-111 |
| Volume (vol) | vol.120 |
| Number (no) | no.249 |
| Page | pp.7-12 |
| #Pages | 6 |
| Date of Issue | 2020-11-18 (RCS) |
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