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| Presentation | 2011-03-04 11:15 Performance evaluation of MC-CDMA system which permits time and frequency offsets Tatsuma Kuwazaki, Tohru Kohda, Yutaka Jitsumatsu (Kyushu Univ.)  IT2010-109 ISEC2010-113 WBS2010-88 |
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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. CDMA is a flexible communication system where interferences between users are admissible. In place of the current CDMA, orthogonal frequency division multiple access (OFDMA) was adopted for the downlink in the cellular phone system of the 3.9th generation that is called LTE(long term evolution). Communication systems using orthogonal multi-carriers, 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 are required for communication systems. In this paper, we review the Gabor’s two dimensional expression of time and frequency plane, and propose multi-carrier CDMA system which permits time and frequency offsets using a Gaussian waveform. The bit error rate (BER) and signal to interference ratio (SIR) of the proposed system are evaluated. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Spreading Sequences / Code Division Multiple Access(CDMA) / Multicarrier modulation / Multipath fading / Gabor filter / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 110, no. 442, IT2010-109, pp. 271-276, March 2011. | |
| Paper # | IT2010-109 | |
| Date of Issue | 2011-02-24 (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 | IT2010-109 ISEC2010-113 WBS2010-88 |
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| Conference Information | |
| Committee | ISEC IT WBS |
| Conference Date | 2011-03-03 - 2011-03-04 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Osaka University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | IT |
| Conference Code | 2011-03-ISEC-IT-WBS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Performance evaluation of MC-CDMA system which permits time and frequency offsets |
| Sub Title (in English) | |
| Keyword(1) | Spreading Sequences |
| Keyword(2) | Code Division Multiple Access(CDMA) |
| Keyword(3) | Multicarrier modulation |
| Keyword(4) | Multipath fading |
| Keyword(5) | Gabor filter |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Tatsuma Kuwazaki |
| 1st Author's Affiliation | Kyushu University (Kyushu Univ.) |
| 2nd Author's Name | Tohru Kohda |
| 2nd Author's Affiliation | Kyushu University (Kyushu Univ.) |
| 3rd Author's Name | Yutaka Jitsumatsu |
| 3rd Author's Affiliation | Kyushu University (Kyushu Univ.) |
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| Speaker | Author-1 |
| Date Time | 2011-03-04 11:15:00 |
| Presentation Time | 25 minutes |
| Registration for | IT |
| Paper # | IT2010-109, ISEC2010-113, WBS2010-88 |
| Volume (vol) | vol.110 |
| Number (no) | no.442(IT), no.443(ISEC), no.444(WBS) |
| Page | pp.271-276 |
| #Pages | 6 |
| Date of Issue | 2011-02-24 (IT, ISEC, WBS) |
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