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| Presentation | 2019-06-21 11:20 Discrete Polar Decoder using Information Bottleneck Akira Yamada, Tomoaki Ohtsuki (Keio Univ.)  RCS2019-92 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Polar codes are attracting much attention and being used for control channels of the 5th generation of mobile communication system (5G). This encoding scheme is based on the operation of channel polarization. As a feature, it is easier to implement encoder and decoder than Turbo codes and LDPC (Low Density Parity Check)codes. One of the decoding methods of polar codes is BP (Belief Propagation) decoding, which can decode in parallel, so that decoding can be performed at high speed. However, due to hardware limitation, calculations on the decoder get very complicated. This issue can be solved by using the information bottleneck method, which is a clustering framework from the field of machine learning. This method compresses an observation variable to a quantized one while attempting to preserve the mutual information shared with a relevant random variable. In the conventional research, the information bottleneck method is applied to BP decoding of LDPC codes. In this report,the information bottleneck method is used for the BP decoding of polar codes. The BP decoding of polar codes is distinct from that of LDPC codes.Since it has several types of messages, and each time a message is updated,the decoding becomes more complex. By using the information bottleneck method, the decoder can compress the channel outputs and the messages of BP into unsigned integers while preventing degradation of the error correcting performance. Thus, we can reduce the complexity of calculation in the decoding process and easily implement the decoder. This report also investigates the minimum bit width for quantization and the suboptimal $E_b/N_0$ for designing the lookup tables used for updating messages. The simulation results show that the error correcting capability of the discrete polar decoders of the proposed method is negligibly degraded compared to BP decoding without compression. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Channel Coding / Polar Codes / BP Decoding / Information Bottleneck method / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 119, no. 90, RCS2019-92, pp. 321-326, June 2019. | |
| Paper # | RCS2019-92 | |
| Date of Issue | 2019-06-12 (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 | RCS2019-92 |
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| Conference Information | |
| Committee | RCS |
| Conference Date | 2019-06-19 - 2019-06-21 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Miyakojima Hirara Port Terminal Building |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | First Presentation in IEICE Technical Committee, Resource Control, Scheduling, Wireless Communications, etc. |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2019-06-RCS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Discrete Polar Decoder using Information Bottleneck |
| Sub Title (in English) | |
| Keyword(1) | Channel Coding |
| Keyword(2) | Polar Codes |
| Keyword(3) | BP Decoding |
| Keyword(4) | Information Bottleneck method |
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| 1st Author's Name | Akira Yamada |
| 1st Author's Affiliation | Keio University (Keio Univ.) |
| 2nd Author's Name | Tomoaki Ohtsuki |
| 2nd Author's Affiliation | Keio University (Keio Univ.) |
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| Speaker | Author-1 |
| Date Time | 2019-06-21 11:20:00 |
| Presentation Time | 10 minutes |
| Registration for | RCS |
| Paper # | RCS2019-92 |
| Volume (vol) | vol.119 |
| Number (no) | no.90 |
| Page | pp.321-326 |
| #Pages | 6 |
| Date of Issue | 2019-06-12 (RCS) |
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