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| Presentation | 2019-01-18 10:50 Performance Improvement of DOA Estimation Using Two-step Search Method Based on Compressed Sensing Toshiya Nasu, Nobuyoshi Kikuma, Kunio Sakakibara (NITech)  AP2018-160 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In recent years, researches for applying signal-processing techniques based on sparse reconstruction andcompressed sensing to DOA (Direction-Of-Arrival) estimation of radio waves have been actively conducted. As oneof the optimization algorithms, ISTA (Iterative Shrinkage-Thresholding Algorithm) employing the steepest gradientmethod is used. In this algorithm, the signal parameters are searched through iterative updating with a constantstep size in the gradient direction, so it takes much time to converge. On the other hand, the conjugate gradient(CG) method is conventionally known as an optimization algorithm with fast convergence, which actually can per-form high-speed parameter searching by using the conjugate properties of search vectors. In the previous papers,the authors proposed two-step search method in which the two algorithms are combined, and it was shown that theestimation accuracy could be improved by using ISTA at the first step and CG method at the second step. In thispaper, the condition used for convergence is examined to improve further the performance of the two-step searchmethod. As a result, it is confirmed that the estimation accuracy is significantly improved and also the computationtime is considerably reduced when setting the convergence condition appropriately. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | DOA estimation / Compressed sensing / ISTA / Conjugate gradient method / Two-step search method / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 118, no. 390, AP2018-160, pp. 51-56, Jan. 2019. | |
| Paper # | AP2018-160 | |
| Date of Issue | 2019-01-10 (AP) | |
| ISSN | 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 | AP2018-160 |
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| Conference Information | |
| Committee | WPT AP |
| Conference Date | 2019-01-17 - 2019-01-18 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Toyota Automobile Museum |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Wireless transmission technology, Radio propagation, Antennas and Propagation |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2019-01-WPT-AP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Performance Improvement of DOA Estimation Using Two-step Search Method Based on Compressed Sensing |
| Sub Title (in English) | |
| Keyword(1) | DOA estimation |
| Keyword(2) | Compressed sensing |
| Keyword(3) | ISTA |
| Keyword(4) | Conjugate gradient method |
| Keyword(5) | Two-step search method |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Toshiya Nasu |
| 1st Author's Affiliation | Nagoya Institute of Technology (NITech) |
| 2nd Author's Name | Nobuyoshi Kikuma |
| 2nd Author's Affiliation | Nagoya Institute of Technology (NITech) |
| 3rd Author's Name | Kunio Sakakibara |
| 3rd Author's Affiliation | Nagoya Institute of Technology (NITech) |
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| Speaker | Author-1 |
| Date Time | 2019-01-18 10:50:00 |
| Presentation Time | 20 minutes |
| Registration for | AP |
| Paper # | AP2018-160 |
| Volume (vol) | vol.118 |
| Number (no) | no.390 |
| Page | pp.51-56 |
| #Pages | 6 |
| Date of Issue | 2019-01-10 (AP) |
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