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| Presentation | 2007-07-19 10:00 Noise Reduction Scheme with Using Redundant GI in Uplink IFDMA Akira Yamasaki (Keio Univ.), Osamu Takyu (Tokyo Univ. of Science), Shunsuke Kondo, Masao Nakagawa (Keio Univ.)  RCS2007-32 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Recently, Interleaved Frequency Division Multiple Access (IFDMA) is attracting attention as a future mobile radio system in uplink cellular system. However, the signal received at the base station is time dispersive due to the multipath fading and the asynchronous transmission among the simultaneous access users, so that Inter-Block Interference (IBI) is occurred. For avoiding IBI, Guard Interval (GI) is pre-inserted to the transmitted signal. The GI length should be decided as the maximum access timing delay and the maximum delay spread are taken into account, where in cellular system, when the users are in the cell edge and underneath the base station, respectively, the access timing delay and the delay spread are largest. However, since the location of the users in the cell is at random, the delay spread and the access timing delay are at random. If the delay spread and the access timing delay are small, the IBI free duration is within GI length and thus the removal of it is wasteful. In this paper, the noise reduction technique with using the redundant GI length is proposed. Computer simulation results show that the proposed technique can reduce the noise component and thus improve bit error rate. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | IFDMA / inter-block interference / guard interval / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 107, no. 147, RCS2007-32, pp. 19-24, July 2007. | |
| Paper # | RCS2007-32 | |
| Date of Issue | 2007-07-12 (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 | RCS2007-32 |
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| Conference Information | |
| Committee | NS RCS |
| Conference Date | 2007-07-19 - 2007-07-20 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kitami Institute of Tech. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2007-07-NS-RCS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Noise Reduction Scheme with Using Redundant GI in Uplink IFDMA |
| Sub Title (in English) | |
| Keyword(1) | IFDMA |
| Keyword(2) | inter-block interference |
| Keyword(3) | guard interval |
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| 1st Author's Name | Akira Yamasaki |
| 1st Author's Affiliation | Keio University (Keio Univ.) |
| 2nd Author's Name | Osamu Takyu |
| 2nd Author's Affiliation | Tokyo University of Science (Tokyo Univ. of Science) |
| 3rd Author's Name | Shunsuke Kondo |
| 3rd Author's Affiliation | Keio University (Keio Univ.) |
| 4th Author's Name | Masao Nakagawa |
| 4th Author's Affiliation | Keio University (Keio Univ.) |
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| Speaker | Author-1 |
| Date Time | 2007-07-19 10:00:00 |
| Presentation Time | 20 minutes |
| Registration for | RCS |
| Paper # | RCS2007-32 |
| Volume (vol) | vol.107 |
| Number (no) | no.147 |
| Page | pp.19-24 |
| #Pages | 6 |
| Date of Issue | 2007-07-12 (RCS) |
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