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| Presentation | 2011-08-26 13:50 A Study of Adaptive Bit Loading for Single-carrier Transmission Using Reduced Complexity Maximum-Likelihood Block Detection Tetsuya Yamamoto, Fumiyuki Adachi (Tohoku Univ.)  RCS2011-130 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In this paper, we propose an adaptive single-carrier (SC) transmission suitable for near maximum likelihood (ML) block detection using QR decomposition and M-algorithm (QRM-MLBD). QRM-MLBD can significantly improve the bit error rate (BER) performance of SC block transmission compared to the frequency-domain equalization (FDE) based on the minimum mean square error (MMSE) criterion. However, in order to achieve a sufficiently improved performance, the use of a fairly large number M of surviving paths in the M-algorithm is required and hence its computational complexity is still very high. If smaller M is used, the BER performance degrades because the probability of removing the correct path at early stages increases. In this paper, to remedy the above problem, we propose an unequal bit loading in an SC transmission block. In QRM-MLBD, the received signal power available at early stages in the M-algorithm (i.e. symbols near the end of block) becomes low. By noting this fact, less number of bits (i.e., lower modulation level) is loaded on symbols close to the end of block. We show that the unequal bit loading for SC block transmission using QRM-MLBD can improve the BER performance compared to the conventional QRM-MLBD for smaller number M of surviving paths in the M-algorithm. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Single-carrier / bit loading / QR decomposition / M-algorithm / maximum likelihood detection / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 111, no. 180, RCS2011-130, pp. 105-110, Aug. 2011. | |
| Paper # | RCS2011-130 | |
| Date of Issue | 2011-08-18 (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 | RCS2011-130 |
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| Conference Information | |
| Committee | RCS SAT |
| Conference Date | 2011-08-25 - 2011-08-26 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Niigata Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Special session on coding techniques, Mobile Satellite Communications, Broadcasting, Error Correction, Wireless Communication Systems, etc. |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2011-08-RCS-SAT |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study of Adaptive Bit Loading for Single-carrier Transmission Using Reduced Complexity Maximum-Likelihood Block Detection |
| Sub Title (in English) | |
| Keyword(1) | Single-carrier |
| Keyword(2) | bit loading |
| Keyword(3) | QR decomposition |
| Keyword(4) | M-algorithm |
| Keyword(5) | maximum likelihood detection |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Tetsuya Yamamoto |
| 1st Author's Affiliation | Tohoku University (Tohoku Univ.) |
| 2nd Author's Name | Fumiyuki Adachi |
| 2nd Author's Affiliation | Tohoku University (Tohoku Univ.) |
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| Speaker | Author-1 |
| Date Time | 2011-08-26 13:50:00 |
| Presentation Time | 25 minutes |
| Registration for | RCS |
| Paper # | RCS2011-130 |
| Volume (vol) | vol.111 |
| Number (no) | no.180 |
| Page | pp.105-110 |
| #Pages | 6 |
| Date of Issue | 2011-08-18 (RCS) |
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