Paper Abstract and Keywords |
Presentation |
2018-01-19 11:30
Performance Improvement by Two-step Search Method in DOA Estimation Based on Sparse Reconstruction Toshiya Nasu, Nobuyoshi Kikuma, Kunio Sakakibara (NITech) AP2017-167 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
In recent years, researches for applying signal-processing techniques based on sparse reconstruction and compressed sensing to DOA (Direction-Of-Arrival) estimation of radio waves have been actively conducted. As one of the optimization algorithms, ISTA (Iterative Shrinkage-Thresholding Algorithm) employing the steepest gradient method is used. In this algorithm, the signal parameters are searched through iterative updating with a constant step 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 perform high-speed parameter searching by using the conjugacy of search vectors. In this paper, the estimation accuracy and computation time are examined for the two algorithms and two-step search algorithms in which the two algorithms are combined. As a result, it is confirmed that the estimation accuracy is the most improved in using ISTA at the first step and CG method at the second step. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
DOA estimation / Sparse reconstruction / ISTA / Conjugate gradient method / Two-step search method / / / |
Reference Info. |
IEICE Tech. Rep., vol. 117, no. 382, AP2017-167, pp. 93-98, Jan. 2018. |
Paper # |
AP2017-167 |
Date of Issue |
2018-01-11 (AP) |
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) |
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AP2017-167 |
Conference Information |
Committee |
AP WPT |
Conference Date |
2018-01-18 - 2018-01-19 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
ATR |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Wireless transmission technology, Radio propagation, Antennas and Propagation |
Paper Information |
Registration To |
AP |
Conference Code |
2018-01-AP-WPT |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Performance Improvement by Two-step Search Method in DOA Estimation Based on Sparse Reconstruction |
Sub Title (in English) |
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Keyword(1) |
DOA estimation |
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Sparse reconstruction |
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ISTA |
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Conjugate gradient method |
Keyword(5) |
Two-step search method |
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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 |
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Nagoya Institute of Technology (NITech) |
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Speaker |
Author-1 |
Date Time |
2018-01-19 11:30:00 |
Presentation Time |
20 minutes |
Registration for |
AP |
Paper # |
AP2017-167 |
Volume (vol) |
vol.117 |
Number (no) |
no.382 |
Page |
pp.93-98 |
#Pages |
6 |
Date of Issue |
2018-01-11 (AP) |
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