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Paper Abstract and Keywords
Presentation 2015-10-09 14:00
Study about multi-channelization in ultrasonic distance measurement using LFM signal coded by M-sequence
Kota Yamanaka, Shinnosuke Hirata, Hiroyuki Hachiya (Tokyo Tech) US2015-60
Abstract (in Japanese) (See Japanese page) 
(in English) In ultrasonic distance measurement by the pulse-echo method, the signal-to-noise ratio (S/N) of the received echo and the resolution of the time of flight (TOF) are improved by employment of pulse compression.
In this research, pulse compression using a maximum-length sequence (M-sequence), which is one of the pseudo-random sequences, has been studied.
An M-sequence is a sequential binary code which is generated from a linear feedback shift register (LFSR).
In pulse compression using an M-sequence, the amplitude or phase of the transmitted signal is modulated by the M-sequence code.
Then, the received signal is correlated with the M-sequence code.
Furthermore, multi-channel concurrent measurement is enabled using transmitted signals which are coded by different M-sequences from different LFSRs.
In the case of a lower-order M-sequence, however, the number of measurement channel, which is the kind of LFSR, is not enough.
In this report, the method of coding of linear-frequency-modulated (LFM) signals, which is one of the frequency-sweep modulated signals, is discribed.
The number of M-sequence codes which are taken from the M-sequence is sequence length.
In case LFM signals are coded by these M-sequence codes, the coded signals can be used as different transmitted signals.
Keyword (in Japanese) (See Japanese page) 
(in English) multi-channel concurrent measurement / pulse compression / M-sequence / LFM signal / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 246, US2015-60, pp. 13-18, Oct. 2015.
Paper # US2015-60 
Date of Issue 2015-10-02 (US) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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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Conference Information
Committee US  
Conference Date 2015-10-09 - 2015-10-09 
Place (in Japanese) (See Japanese page) 
Place (in English) Kanazawa Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To US 
Conference Code 2015-10-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study about multi-channelization in ultrasonic distance measurement using LFM signal coded by M-sequence 
Sub Title (in English)  
Keyword(1) multi-channel concurrent measurement  
Keyword(2) pulse compression  
Keyword(3) M-sequence  
Keyword(4) LFM signal  
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1st Author's Name Kota Yamanaka  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Shinnosuke Hirata  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
3rd Author's Name Hiroyuki Hachiya  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
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Speaker Author-1 
Date Time 2015-10-09 14:00:00 
Presentation Time 30 minutes 
Registration for US 
Paper # US2015-60 
Volume (vol) vol.115 
Number (no) no.246 
Page pp.13-18 
#Pages
Date of Issue 2015-10-02 (US) 


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