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| Presentation | 2015-03-04 15:25 Fundamental Study on Structure and Adaptive Control of Time-Frequency 2D AGC Using Analogue Transversal Filter Naotoshi Yamasaki, Makoto Taromaru, Mai Ohta (Fukuoka Univ.)  RCS2014-331 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Software defined radio (SDR) receivers A/D convert the multiple waves in the whole receivable band, and it can select and demodulate the desired received signal with digital signal processing such as digital filters. However, quantization bits of faster A/D converters are usually about 10bits, and sufficient dynamic range as a receiver can’t be obtained. Using AGC like a conventional receiver, the gain is controlled so as to make the envelop constant for the strongest received signal among the multiple waves, so it operates as AGC for the strongest received signal. Therefore, when received waves have a large difference in signal level, SNR of the weaker waves is degraded, there is a problem that it can’t successfully demodulated. We proposed Time-Frequency 2D AGC using an analog transversal filter to solve the above mentioned problem. The filter operates as an adaptive filter, and it is controled so that the output signal level is approximately constant or a certain range. After A/D converting the filter output, it controls adaptively the tap weights with discrete fourier transform such as FFT by digital signal processing. In this report, we performed computer simulation using tap coefficient update algorithm that we reported, and we confirmed that the dynamic range is successfully reduced. It shows that the system operates well as AGC. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | software defined radio / transversal filter / adaptive filter / AGC / dynamic range / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 490, RCS2014-331, pp. 177-182, March 2015. | |
| Paper # | RCS2014-331 | |
| Date of Issue | 2015-02-25 (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 | RCS2014-331 |
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| Conference Information | |
| Committee | RCS SR SRW |
| Conference Date | 2015-03-04 - 2015-03-06 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo Institute of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Communication Workshop |
| Paper Information | |
| Registration To | RCS |
| Conference Code | 2015-03-RCS-SR-SRW |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Fundamental Study on Structure and Adaptive Control of Time-Frequency 2D AGC Using Analogue Transversal Filter |
| Sub Title (in English) | |
| Keyword(1) | software defined radio |
| Keyword(2) | transversal filter |
| Keyword(3) | adaptive filter |
| Keyword(4) | AGC |
| Keyword(5) | dynamic range |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Naotoshi Yamasaki |
| 1st Author's Affiliation | Fukuoka University (Fukuoka Univ.) |
| 2nd Author's Name | Makoto Taromaru |
| 2nd Author's Affiliation | Fukuoka University (Fukuoka Univ.) |
| 3rd Author's Name | Mai Ohta |
| 3rd Author's Affiliation | Fukuoka University (Fukuoka Univ.) |
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| Speaker | Author-1 |
| Date Time | 2015-03-04 15:25:00 |
| Presentation Time | 25 minutes |
| Registration for | RCS |
| Paper # | RCS2014-331 |
| Volume (vol) | vol.114 |
| Number (no) | no.490 |
| Page | pp.177-182 |
| #Pages | 6 |
| Date of Issue | 2015-02-25 (RCS) |
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