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| Presentation | 2021-06-25 10:00 A Study on Phase-Noise-Aware LLR Calculation for Millimeter-wave MIMO Systems with High-Order Modulation Daiki Wakumoto, Takumi Takahashi (Osaka Univ.), Shinsuke Ibi (Doshisha Univ.), Seiichi Sampei (Osaka Univ.)  RCS2021-66 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper proposes a low-complexity demodulation method via phase-noise-aware log-likelihood ratios (LLRs) at the base station (BS) side in millimeter-wave (mmWave) multi-input multi-output (MIMO) systems with higher-orde quadrature amplitude modulation (QAM). When using high-order modulation schemes in mmWave wide-band wireless communication systems, although the additive white Gaussian noise (AWGN) is small owing to the operation at the high signal-to-noise ratio (SNR) region, the phase noise from the local oscillator severely degrades the demodulation performance. To address this issue，we analytically formulate the approximate probability density function (PDF) of the received signals including phase noise, and calculate a reliable LLRs input to the subsequent channel decoder, assuming the use of a forward error correction technique, textit{e.g.}, low-density parity-check code. Computer simulations demonstrate the validity of our proposed method in terms of bit error rate (BER) performance in coded MIMO systems． |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | MU-MIMO detection / mmWave / phase noise / higher-order modulation / log-likelihood ratio / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 121, no. 72, RCS2021-66, pp. 214-219, June 2021. | |
| Paper # | RCS2021-66 | |
| Date of Issue | 2021-06-16 (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 | RCS2021-66 |
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| Conference Information | |
| Committee | RCS |
| Conference Date | 2021-06-23 - 2021-06-25 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| 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 | 2021-06-RCS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Phase-Noise-Aware LLR Calculation for Millimeter-wave MIMO Systems with High-Order Modulation |
| Sub Title (in English) | |
| Keyword(1) | MU-MIMO detection |
| Keyword(2) | mmWave |
| Keyword(3) | phase noise |
| Keyword(4) | higher-order modulation |
| Keyword(5) | log-likelihood ratio |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Daiki Wakumoto |
| 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 | 2021-06-25 10:00:00 |
| Presentation Time | 10 minutes |
| Registration for | RCS |
| Paper # | RCS2021-66 |
| Volume (vol) | vol.121 |
| Number (no) | no.72 |
| Page | pp.214-219 |
| #Pages | 6 |
| Date of Issue | 2021-06-16 (RCS) |
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