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| Presentation | 2009-03-09 09:25 Markovian Coded Gaussian Filter with its application to Filterbanks Tohru Kohda, Yutaka Jitsumatsu, Tatsuma Kuwazaki, Kenjiro Fujino (Kyushu Univ.)  IT2008-58 ISEC2008-116 WBS2008-71 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In code division multiple access (CDMA) systems, spreading code is introduced as the third axis in addition to the time and the frequency axes. The CDMA is a flexible communication system where interferences between users are admissible. In place of the current CDMA, orthogonal frequency division multiple access (OFDMA) is expected to be adopted for the downlink in the cellular phone system of the 3.9th generation that is called LTE(long term evolution). In the orthogonal carrier method, the signals of each subcarriers overlap in the frequency domain. Hence the interference between carriers increases rapidly when the frequency offset is caused by Doppler effect. Not only the efficiency of transmission but also robustness to an inevitable time and frequency synchronization errors is required for communication systems. In this paper, we go back to the Gabor's two dimensional expression of time and frequency plane. A multi-carrier CDMA system using a Gaussian waveform is proposed. The interference between carriers and the bit error rate of the proposed system are evaluated. The Gaussian waveform is not orthogonal therefore the inter-carrier interference exists even when there is no frequency offset. However, the increasing rate of the inter-carrier interference to the frequency offset is very small compared with the rectangular wave. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Spreading Sequences / Code Division Multiple Access(CDMA) / Spread Spectrum(SS) / Multicarrier modulation / Gabor filter / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 108, no. 472, IT2008-58, pp. 91-98, March 2009. | |
| Paper # | IT2008-58 | |
| Date of Issue | 2009-03-02 (IT, ISEC, WBS) | |
| 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 | IT2008-58 ISEC2008-116 WBS2008-71 |
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| Conference Information | |
| Committee | WBS IT ISEC |
| Conference Date | 2009-03-09 - 2009-03-10 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hakodate Mirai Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | IT |
| Conference Code | 2009-03-WBS-IT-ISEC |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Markovian Coded Gaussian Filter with its application to Filterbanks |
| Sub Title (in English) | |
| Keyword(1) | Spreading Sequences |
| Keyword(2) | Code Division Multiple Access(CDMA) |
| Keyword(3) | Spread Spectrum(SS) |
| Keyword(4) | Multicarrier modulation |
| Keyword(5) | Gabor filter |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Tohru Kohda |
| 1st Author's Affiliation | Kyushu University (Kyushu Univ.) |
| 2nd Author's Name | Yutaka Jitsumatsu |
| 2nd Author's Affiliation | Kyushu University (Kyushu Univ.) |
| 3rd Author's Name | Tatsuma Kuwazaki |
| 3rd Author's Affiliation | Kyushu University (Kyushu Univ.) |
| 4th Author's Name | Kenjiro Fujino |
| 4th Author's Affiliation | Kyushu University (Kyushu Univ.) |
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| Speaker | Author-3 |
| Date Time | 2009-03-09 09:25:00 |
| Presentation Time | 25 minutes |
| Registration for | IT |
| Paper # | IT2008-58, ISEC2008-116, WBS2008-71 |
| Volume (vol) | vol.108 |
| Number (no) | no.472(IT), no.473(ISEC), no.474(WBS) |
| Page | pp.91-98 |
| #Pages | 8 |
| Date of Issue | 2009-03-02 (IT, ISEC, WBS) |
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