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| Presentation | 2015-11-04 11:25 A Study on LLR Updating in an LDPC Coded Massive MIMO System with Belief Propagation Shuhei Tanno, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa (Hokkaido Univ.)  RCS2015-196 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | A multiple-input multiple-output (MIMO) system is possible to improve the throughput performance by increasing the number of both transmit and receive antennas. However, detecting signals of an order of hundreds is generally difficult in terms of computational complexity in fully-massive MIMO systems. To solve this problem, a use of belief propagation has been recently proposed and the good performances have been shown in QPSK-modulated massive MIMO systems. The belief propagation algorithm is also widely used for LDPC decoding. In this paper, we focus on the factor graph configuration. Two kinds of graphs: bipartite and tripartite types are considered and those performance differences are evaluated. The simulation results show that an LLR imbalance between LDPC check nodes and signal detection nodes prevents the convergence and that the LLR damping or limiting in the sum-product decoder can ease the problem. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | MIMO / Spatial Multiplexing / Belief Propagation / Low-Density Parity-Check Code / Sum-Product Decoding / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 115, no. 288, RCS2015-196, pp. 37-42, Nov. 2015. | |
| Paper # | RCS2015-196 | |
| Date of Issue | 2015-10-28 (RCS) | |
| ISSN | Print edition: ISSN 0913-5685 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 | RCS2015-196 |
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| Conference Information | |
| Committee | AP RCS WPT SAT |
| Conference Date | 2015-11-04 - 2015-11-06 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Okinawa Prefectural Museum & Art Museum |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Antenna and Propagation, Radio Communication, Satelite Communication, Wireless Power Transfer |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2015-11-AP-RCS-WPT-SAT |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on LLR Updating in an LDPC Coded Massive MIMO System with Belief Propagation |
| Sub Title (in English) | |
| Keyword(1) | MIMO |
| Keyword(2) | Spatial Multiplexing |
| Keyword(3) | Belief Propagation |
| Keyword(4) | Low-Density Parity-Check Code |
| Keyword(5) | Sum-Product Decoding |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Shuhei Tanno |
| 1st Author's Affiliation | Hokkaido University (Hokkaido Univ.) |
| 2nd Author's Name | Toshihiko Nishimura |
| 2nd Author's Affiliation | Hokkaido University (Hokkaido Univ.) |
| 3rd Author's Name | Takeo Ohgane |
| 3rd Author's Affiliation | Hokkaido University (Hokkaido Univ.) |
| 4th Author's Name | Yasutaka Ogawa |
| 4th Author's Affiliation | Hokkaido University (Hokkaido Univ.) |
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| Speaker | Author-1 |
| Date Time | 2015-11-04 11:25:00 |
| Presentation Time | 25 minutes |
| Registration for | RCS |
| Paper # | RCS2015-196 |
| Volume (vol) | vol.115 |
| Number (no) | no.288 |
| Page | pp.37-42 |
| #Pages | 6 |
| Date of Issue | 2015-10-28 (RCS) |
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