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| Presentation | 2008-02-07 13:25 A study on Optimum OBO of Multi-level Modulation Schemes for the advanced Satellite Broadcasting System Masaaki Kojima, Yoichi Suzuki, Akinori Hashimoto, Hisashi Sujikai, Shoji Tanaka, Takeshi Kimura, Kazuyoshi Shogen (NHK)  AP2007-167 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | NHK is studying the advanced satellite broadcasting system which aims to increase transmission capacity more than that of the present satellite broadcasting system (ISDB-S). In this advanced system, we expect to increase transmission capacity by approximately 30% by adopting LDPC (Low Density Parity Check) codes and reduced roll-off factor. We are also considering 16APSK and 32APSK in addition to the present PSK modulation schemes. In these modulation schemes, modulated symbols are mapped on concentric circles which have the different radii. In this advanced system, we reported that transmission efficiency could be increased by selecting the optimum radii of 16APSK and 32APSK for each coding rate. On the other hand, TWTA (Traveling Wave Tube Amplifier) is needed to work in the quasi-linear operating region when using APSK because of non-linear amplification in satellite transmissions. In this paper, we report the study on Optimum OBO (Output-Back-Off) of 16APSK and 32APSK for each coding rate by indoor transmission experiments with respect to the most efficient use of the limited transmission power of a satellite. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Advanced Satellite Broadcasting System / ISDB-S / LDPC / 16APSK / 32APSK / coding rate / Non-linear Amplification / TWTA | |
| Reference Info. | IEICE Tech. Rep., vol. 107, no. 479, AP2007-167, pp. 23-28, Feb. 2008. | |
| Paper # | AP2007-167 | |
| Date of Issue | 2008-01-31 (AP) | |
| 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 | AP2007-167 |
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| Conference Information | |
| Committee | AP |
| Conference Date | 2008-02-07 - 2008-02-07 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | NHK |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | etc. |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2008-02-AP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A study on Optimum OBO of Multi-level Modulation Schemes for the advanced Satellite Broadcasting System |
| Sub Title (in English) | |
| Keyword(1) | Advanced Satellite Broadcasting System |
| Keyword(2) | ISDB-S |
| Keyword(3) | LDPC |
| Keyword(4) | 16APSK |
| Keyword(5) | 32APSK |
| Keyword(6) | coding rate |
| Keyword(7) | Non-linear Amplification |
| Keyword(8) | TWTA |
| 1st Author's Name | Masaaki Kojima |
| 1st Author's Affiliation | NHK (NHK) |
| 2nd Author's Name | Yoichi Suzuki |
| 2nd Author's Affiliation | NHK (NHK) |
| 3rd Author's Name | Akinori Hashimoto |
| 3rd Author's Affiliation | NHK (NHK) |
| 4th Author's Name | Hisashi Sujikai |
| 4th Author's Affiliation | NHK (NHK) |
| 5th Author's Name | Shoji Tanaka |
| 5th Author's Affiliation | NHK (NHK) |
| 6th Author's Name | Takeshi Kimura |
| 6th Author's Affiliation | NHK (NHK) |
| 7th Author's Name | Kazuyoshi Shogen |
| 7th Author's Affiliation | NHK (NHK) |
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| Speaker | Author-1 |
| Date Time | 2008-02-07 13:25:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2007-167 |
| Volume (vol) | vol.107 |
| Number (no) | no.479 |
| Page | pp.23-28 |
| #Pages | 6 |
| Date of Issue | 2008-01-31 (AP) |
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