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| Presentation | 2021-03-05 17:20 [Encouragement Talk] A Study on Downlink Channel Estimation Based on Multipath Separation in a Wideband FDD System Shiori Tosaka, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara, Takanori Sato (Hokkaido Univ.)  RCS2020-261 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In an FDD system, downlink channel state information (CSI) is necessary at a base station for efficient transmission. The CSI estimated at user equipment using downlink pilot symbols is fed back to the base station. However, this method reduces transmission efficiency in a massive MIMO system. In this paper, we propose a method to estimate downlink CSI at a base station using an uplink pilot symbol and downlink CSI obtained with a pilot symbol from a single base station antenna. We separate uplink multipaths in the delay domain and spatial domain using 2D FISTA. Using the delays, directions of arrival, and the measured downlink CSI, we obtain the downlink CSI for all the base station antennas. It has been shown that although the estimation performance in a SIMO-OFDM system depends on the bandwidth, we can estimate the downlink CSI with the proposed technique. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | FDD / multipath separation / downlink channel estimation / FISTA / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 120, no. 404, RCS2020-261, pp. 267-272, March 2021. | |
| Paper # | RCS2020-261 | |
| Date of Issue | 2021-02-24 (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 | RCS2020-261 |
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| Conference Information | |
| Committee | RCS SR SRW |
| Conference Date | 2021-03-03 - 2021-03-05 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Communication Workshop |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2021-03-RCS-SR-SRW |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Downlink Channel Estimation Based on Multipath Separation in a Wideband FDD System |
| Sub Title (in English) | |
| Keyword(1) | FDD |
| Keyword(2) | multipath separation |
| Keyword(3) | downlink channel estimation |
| Keyword(4) | FISTA |
| Keyword(5) | |
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| Keyword(8) | |
| 1st Author's Name | Shiori Tosaka |
| 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.) |
| 5th Author's Name | Junichiro Hagiwara |
| 5th Author's Affiliation | Hokkaido University (Hokkaido Univ.) |
| 6th Author's Name | Takanori Sato |
| 6th Author's Affiliation | Hokkaido University (Hokkaido Univ.) |
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| Speaker | Author-1 |
| Date Time | 2021-03-05 17:20:00 |
| Presentation Time | 25 minutes |
| Registration for | RCS |
| Paper # | RCS2020-261 |
| Volume (vol) | vol.120 |
| Number (no) | no.404 |
| Page | pp.267-272 |
| #Pages | 6 |
| Date of Issue | 2021-02-24 (RCS) |
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