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| Presentation | 2016-03-04 16:45 Suppression of Multiple Wideband-Interferences Based on Superposition Probability Yuto Kakizaki, Yohei Shibata, Tomoaki Ohtsuki (Keio Univ.), Jun Mashino (NTT)  RCS2015-399 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Superposed multicarrier transmission is proposed as one of the schemes that improve frequency utilization efficiency. In this scheme some wireless systems share the same spectrum, and interference suppression is necessary. One conventional scheme for the interference suppression applies the EM (Expectation Maximization) algorithm for the estimation of interference parameters, and another scheme iterates the estimation of the parameters based on undesired signal power. However, these schemes assume the same average power for all interferences, which makes accuracy of the estimated power lower and results in degradation of BER (Bit Error Rate) when the average power of each interference is not same. In this report, we propose a suppression schemes for multiple interferences with different average power levels. In our scheme, undesired signal power is averaged in both time and frequency domains, after which it is compared to threshold to determine if the corresponding subcarrier is superposed or not. According to the result of this comparison, the power of each interference is estimated. Furthermore, the threshold is iteratively recalculated when the estimated parameters are updated. Through computer simulations, we show that the proposed scheme taking the different average power of interference into account shows better BER performance than that of conventional ones assuming the same average power of interference. In addition, we show that averaging undesired signal power in both time and frequency domains and iterative calculation of threshold lead to improvement of the accuracy of superposed band detection. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Superposed Multicarrier Transmission / LLR / Superposition Probability / Residual power / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 115, no. 472, RCS2015-399, pp. 387-392, March 2016. | |
| Paper # | RCS2015-399 | |
| Date of Issue | 2016-02-24 (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 | RCS2015-399 |
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| Conference Information | |
| Committee | RCS CCS SR SRW |
| Conference Date | 2016-03-02 - 2016-03-04 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo Institute of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Communication Workshop |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2016-03-RCS-CCS-SR-SRW |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Suppression of Multiple Wideband-Interferences Based on Superposition Probability |
| Sub Title (in English) | |
| Keyword(1) | Superposed Multicarrier Transmission |
| Keyword(2) | LLR |
| Keyword(3) | Superposition Probability |
| Keyword(4) | Residual power |
| Keyword(5) | |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Yuto Kakizaki |
| 1st Author's Affiliation | Keio University (Keio Univ.) |
| 2nd Author's Name | Yohei Shibata |
| 2nd Author's Affiliation | Keio University (Keio Univ.) |
| 3rd Author's Name | Tomoaki Ohtsuki |
| 3rd Author's Affiliation | Keio University (Keio Univ.) |
| 4th Author's Name | Jun Mashino |
| 4th Author's Affiliation | Nippon Telegraph and Telephone Corporation (NTT) |
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| Speaker | Author-1 |
| Date Time | 2016-03-04 16:45:00 |
| Presentation Time | 25 minutes |
| Registration for | RCS |
| Paper # | RCS2015-399 |
| Volume (vol) | vol.115 |
| Number (no) | no.472 |
| Page | pp.387-392 |
| #Pages | 6 |
| Date of Issue | 2016-02-24 (RCS) |
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