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| Presentation | 2014-05-23 13:45 Estimation method for an asymmetric waveform in 1-bit digital RF transmitter Takashi Maehata (SEI), Suguru Kameda, Noriharu Suematsu (Tohoku University)  SR2014-16 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | The output of 1-bit digital radio frequency (1-bit DRF) transmitter, using a bandpass delta sigma modulator, ideally has a rectangular waveform and a realistic waveform having a blunt waveforms due to a slew rate for an analog circuit is not enough. Recent works report that its time waveform which includes asymmetrical component on the time axis generates a distortion on an adjacent channel and that its component can be compensated for by feedforward distortion compensation technology. In order to compensate for it on an eye pattern output by the 1bit DRF transmitter, it should be precisely measured by a high-speed oscilloscope. However, under a broadband measurement condition, a noise makes a line width of the eye pattern wider, which makes it difficult to measure a precise asymmetric component. Therefore, we propose a new estimation method for the whole of the asymmetric component by measuring an asymmetric component included in a bandwidth including double side adjacency channel in the frequency domain. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Bandpass / delta-sigma modulator / D/A converter / feedforward / distortion compensation / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 44, SR2014-16, pp. 103-109, May 2014. | |
| Paper # | SR2014-16 | |
| Date of Issue | 2014-05-15 (SR) | |
| 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 | SR2014-16 |
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| Conference Information | |
| Committee | SR |
| Conference Date | 2014-05-22 - 2014-05-23 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Toshiba Education & Training Institute |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Technical Exhibition, Product Exhibition, Cognitive Radio, Software Defined Radio, Heterogeneous Network, etc. |
| Paper Information | |
| Registration To | SR |
| Conference Code | 2014-05-SR |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Estimation method for an asymmetric waveform in 1-bit digital RF transmitter |
| Sub Title (in English) | |
| Keyword(1) | Bandpass |
| Keyword(2) | delta-sigma modulator |
| Keyword(3) | D/A converter |
| Keyword(4) | feedforward |
| Keyword(5) | distortion compensation |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Takashi Maehata |
| 1st Author's Affiliation | Sumitomo Electric Industries Ltd. (SEI) |
| 2nd Author's Name | Suguru Kameda |
| 2nd Author's Affiliation | Tohoku University (Tohoku University) |
| 3rd Author's Name | Noriharu Suematsu |
| 3rd Author's Affiliation | Tohoku University (Tohoku University) |
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| Speaker | Author-1 |
| Date Time | 2014-05-23 13:45:00 |
| Presentation Time | 25 minutes |
| Registration for | SR |
| Paper # | SR2014-16 |
| Volume (vol) | vol.114 |
| Number (no) | no.44 |
| Page | pp.103-109 |
| #Pages | 7 |
| Date of Issue | 2014-05-15 (SR) |
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