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Paper Abstract and Keywords
Presentation 2017-10-05 15:20
Pulse compression of parametric sound using M-sequence phase modulation
Riku Nishioka, Hideyuki Nomura (UEC) US2017-61
Abstract (in Japanese) (See Japanese page) 
(in English) The application of pulse compression to parametric ultrasound using chirp modulation have been proposed to realize low-frequency ultrasound imaging. However, the application of chirp modulation to the parametric ultrasound generates sidelobes which affect signal-to-noise ratio (SNR) of image quality. In the present study, maximal length sequential (Msequential) modulation is applied to parametric ultrasound to improve the SNR of parametric ultrasound imaging. The pulse widths of pulse compressions of chirp-modulated and M-sequential modulated parametric ultrasounds directly received in water were agree well with the theoretical value. In addition, the increase of the order of M-sequential code decrease time sidelobe level of pulse compressed signal. Obtained images of a single brass rod in water indicated that although the application of chirp modulation showed time sidelobes after mainloabes, that of sixth order of M-sequential modulation reduced sidelobes around mainlobes and improved the image quality. These results suggest that the application of M-sequential modulation to the pulse compression is a useful method to improve an image quality even in low-frequency ultrasound imaging using parametric ultrasound.
Keyword (in Japanese) (See Japanese page) 
(in English) Parametric ultrasound / M-sequence modulation / Pulse compression / Time sidelobe / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 227, US2017-61, pp. 27-32, Oct. 2017.
Paper # US2017-61 
Date of Issue 2017-09-28 (US) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee US  
Conference Date 2017-10-05 - 2017-10-05 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To US 
Conference Code 2017-10-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Pulse compression of parametric sound using M-sequence phase modulation 
Sub Title (in English)  
Keyword(1) Parametric ultrasound  
Keyword(2) M-sequence modulation  
Keyword(3) Pulse compression  
Keyword(4) Time sidelobe  
1st Author's Name Riku Nishioka  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Hideyuki Nomura  
2nd Author's Affiliation The University of Electro-Communications (UEC)
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Date Time 2017-10-05 15:20:00 
Presentation Time 25 
Registration for US 
Paper # IEICE-US2017-61 
Volume (vol) IEICE-117 
Number (no) no.227 
Page pp.27-32 
#Pages IEICE-6 
Date of Issue IEICE-US-2017-09-28 

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