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| Presentation | 2014-12-19 10:15 Proposal of Channel Estimation Method for Uplink OFDMA System under Time-varying Fading Environments Tanairat Mata, Mio Hourai (Mie Univ.), Pisit Boonsrimuang (KMITL), Kazuo Mori, Hideo Kobayashi (Mie Univ.)  RCS2014-254 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Orthogonal Frequency Division Multiple Access (OFDMA) is considered as one of promising wireless communications techniques which can accommodate multiple users efficiently. In uplink OFDMA system, it is required to estimate all users? channel links simultaneously at base station (BS). To solve this problem, although the conventional Discrete Fourier Transform (DFT) interpolation-based channel estimation (DFTI-CE) method was proposed for uplink OFDMA system, the estimation accuracy of DFTI-CE method would be degraded when null subcarriers (zero padding) are added at both end of data subcarriers to reject the aliasing occurring at the output of D/A converter. In other words, the sampling rate for OFDM signal at the transmitter is taken by the non-Nyquist sampling in which the number of data subcarriers is not equal to the number of IFFT points. To solve this problem, this paper proposes a new time-domain channel estimation (TD-CE) method which can achieve higher estimation accuracy even at non-Nyquist sampling. The salient feature of proposed TD-CE method is to enable the estimation of all users' channel links simultaneously at the BS by using one common preamble symbol. This paper presents various simulation results to demonstrate the effectiveness of proposed estimation method. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | uplink OFDMA / Zero-padding / non-Nyquist sampling / DFTI-CE / TD-CE / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 372, RCS2014-254, pp. 201-206, Dec. 2014. | |
| Paper # | RCS2014-254 | |
| Date of Issue | 2014-12-11 (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 | RCS2014-254 |
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| Conference Information | |
| Committee | RCS NS |
| Conference Date | 2014-12-18 - 2014-12-19 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Iseshi-Kanko-Bunka-Kaikan (Mie) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Ad-hoc Network, Ubiquitous Network, Wireless Communication, security, Multi-Access Network |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2014-12-RCS-NS |
| Language | English |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Proposal of Channel Estimation Method for Uplink OFDMA System under Time-varying Fading Environments |
| Sub Title (in English) | |
| Keyword(1) | uplink OFDMA |
| Keyword(2) | Zero-padding |
| Keyword(3) | non-Nyquist sampling |
| Keyword(4) | DFTI-CE |
| Keyword(5) | TD-CE |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Tanairat Mata |
| 1st Author's Affiliation | Mie University (Mie Univ.) |
| 2nd Author's Name | Mio Hourai |
| 2nd Author's Affiliation | Mie University (Mie Univ.) |
| 3rd Author's Name | Pisit Boonsrimuang |
| 3rd Author's Affiliation | King Mongkut's Institute of Technology Ladkrabang (KMITL) |
| 4th Author's Name | Kazuo Mori |
| 4th Author's Affiliation | Mie University (Mie Univ.) |
| 5th Author's Name | Hideo Kobayashi |
| 5th Author's Affiliation | Mie University (Mie Univ.) |
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| Speaker | Author-1 |
| Date Time | 2014-12-19 10:15:00 |
| Presentation Time | 25 minutes |
| Registration for | RCS |
| Paper # | RCS2014-254 |
| Volume (vol) | vol.114 |
| Number (no) | no.372 |
| Page | pp.201-206 |
| #Pages | 6 |
| Date of Issue | 2014-12-11 (RCS) |
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