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| Presentation | 2012-05-24 13:00 [Technology Exhibit] Frequency-dependent I/Q Imbalance Compensation for Wideband Quadrature Modulator using Sub-band Circuit Parameter Estimation Minseok Kim, Yuta Maruichi, Jun-ichi Takada (Tokyo Inst. of Tech.)  SR2012-2 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper proposes a parametric method of frequency-dependent I/Q imbalance compensation for wideband quadrature modulators by means of the spectrum measurement of a radio frequency (RF) signal that is easily performed by a general purposed spectrum analyzer. The proposed method empirically estimates frequency-dependent circuit parameters with only magnitude information of the frequency spectrum of the RF signal that can be fed back from the spectrum analyzer via Ethernet or GPIB. The frequency dependency in I/Q imbalance effect that is generated by the difference between the frequency responses of I and Q branches, is modeled by frequency-dependent circuit parameters. By dividing the whole signal band into several sub-bands, the transmitting signals are pre-distorted per individual sub-band in frequency domain. For estimating the frequency-dependent circuit parameters, in this paper, the modified method of steepest descent that has been developed for single-band compensation is extended to the frequency domain sub-band compensation scheme. By implementing an automatic sub-band circuit parameter estimation system, the compensation effect is demonstrated. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Quadrature modulator / I/Q imbalance / Image distortion / Steepest descent / Spectrum analyzer / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 112, no. 55, SR2012-2, pp. 9-16, May 2012. | |
| Paper # | SR2012-2 | |
| Date of Issue | 2012-05-17 (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 | SR2012-2 |
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| Conference Information | |
| Committee | SR |
| Conference Date | 2012-05-24 - 2012-05-25 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Keio univ. at Hiyoshi |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | technical exhibition, product exhibition, software radio, radio hardware technologies |
| Paper Information | |
| Registration To | SR |
| Conference Code | 2012-05-SR |
| Language | English (Japanese title is available) |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Frequency-dependent I/Q Imbalance Compensation for Wideband Quadrature Modulator using Sub-band Circuit Parameter Estimation |
| Sub Title (in English) | |
| Keyword(1) | Quadrature modulator |
| Keyword(2) | I/Q imbalance |
| Keyword(3) | Image distortion |
| Keyword(4) | Steepest descent |
| Keyword(5) | Spectrum analyzer |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Minseok Kim |
| 1st Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
| 2nd Author's Name | Yuta Maruichi |
| 2nd Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
| 3rd Author's Name | Jun-ichi Takada |
| 3rd Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
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| Speaker | Author-1 |
| Date Time | 2012-05-24 13:00:00 |
| Presentation Time | 150 minutes |
| Registration for | SR |
| Paper # | SR2012-2 |
| Volume (vol) | vol.112 |
| Number (no) | no.55 |
| Page | pp.9-16 |
| #Pages | 8 |
| Date of Issue | 2012-05-17 (SR) |
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