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| Presentation | 2012-10-18 15:40 A Novel 1-bit Feedforward Distorted Compensation for Bandpass ΔΣ modulation Takashi Maehata, Kazuyuki Totani (SEI), Suguru Kameda, Noriharu Suematsu (Tohoku University)  RCS2012-143 SR2012-63 AN2012-37 USN2012-40 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | We propose a novel 1-bit feedforward distorted compensation technology in a direct radio frequency converter (DRFC) which is a kind of RF transmitter using bandpass delta-sigma modulation (BP-DSM). BP-DSM efficiently performs high resolution data conversion using oversampling. It can directly output a RF signal from baseband using 1-bit digital pulse train with a rectangular waveform and but, recently related works reported that an adjacent channel leakage ratio (ACLR) deteriorates when this waveform is off an ideal waveform. Proposal method in this paper can compensate this ACLR and be performed by using a distorted compensation signal with a 1-bit digital pulse train. Therefore this novel method does not need an analog RF circuit for compensation. In simulation, a theoretical approach of proposal method leads to high ACLR 60 dB to compensate this distortion even if two kinds of signals are distorted independently. We measured that the proposed method compensates ACLR from 46 dB to 50 dB in a developed prototype. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Bandpass / delta-sigma / feedforward compensation / D/A converter / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 112, no. 240, SR2012-63, pp. 165-172, Oct. 2012. | |
| Paper # | SR2012-63 | |
| Date of Issue | 2012-10-10 (RCS, SR, AN, USN) | |
| 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 | RCS2012-143 SR2012-63 AN2012-37 USN2012-40 |
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| Conference Information | |
| Committee | SR AN USN RCS |
| Conference Date | 2012-10-17 - 2012-10-19 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Fukuoka univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | wireless distributed network, general topics |
| Paper Information | |
| Registration To | SR |
| Conference Code | 2012-10-SR-AN-USN-RCS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Novel 1-bit Feedforward Distorted Compensation for Bandpass ΔΣ modulation |
| Sub Title (in English) | |
| Keyword(1) | Bandpass |
| Keyword(2) | delta-sigma |
| Keyword(3) | feedforward compensation |
| Keyword(4) | D/A converter |
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| Keyword(8) | |
| 1st Author's Name | Takashi Maehata |
| 1st Author's Affiliation | Sumitomo Electric Industries Ltd. (SEI) |
| 2nd Author's Name | Kazuyuki Totani |
| 2nd Author's Affiliation | Sumitomo Electric Industries Ltd. (SEI) |
| 3rd Author's Name | Suguru Kameda |
| 3rd Author's Affiliation | Tohoku University (Tohoku University) |
| 4th Author's Name | Noriharu Suematsu |
| 4th Author's Affiliation | Tohoku University (Tohoku University) |
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| Speaker | Author-1 |
| Date Time | 2012-10-18 15:40:00 |
| Presentation Time | 25 minutes |
| Registration for | SR |
| Paper # | RCS2012-143, SR2012-63, AN2012-37, USN2012-40 |
| Volume (vol) | vol.112 |
| Number (no) | no.239(RCS), no.240(SR), no.241(AN), no.242(USN) |
| Page | pp.107-114(RCS), pp.165-172(SR), pp.77-84(AN), pp.71-78(USN) |
| #Pages | 8 |
| Date of Issue | 2012-10-10 (RCS, SR, AN, USN) |
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