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Paper Abstract and Keywords
Presentation 2017-09-22 11:10
A Study on the SNR in Higher Nyquist Zone of 1-Bit Band-Pass Delta-Sigma Modulator using Manchester Coding
Masafumi Kazuno, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu (Tohoku Univ.) MW2017-73 Link to ES Tech. Rep. Archives: MW2017-73
Abstract (in Japanese) (See Japanese page) 
(in English) A 1-bit $delta$$sigma$ modulator using the first Nyquist zone has been reported as a method of directly generating an RF signal. If the image signal generated in the higher Nyquist zone can be used as the transmission signal, it is possible to output a signal beyond the Nyquist frequency. However, it is attenuated due to the frequency response of Non Return to Zero (NRZ) sinc function, and the SNR is degraded. In order to increase the power of the image signal, Return to Zero (RZ)-DAC is proposed and demonstrate using holding pulse with duty ratio of 50% or less.
In this paper, we propose using Manchester coding with NRZ output to obtain higher power image signal than RZ-DAC in the specific Nyquist zone. We observe the SNR of 1-bit band-pass delta-sigma DAC in higher order Nyquist zone in the measurement. With the proposed method, we show the power enhancement of image signals around the odd-numbered sampling frequency. By using 1Vp-p / 8GS/s band pass $delta$$sigma$ DAC with proposed method, we confirmed that the SNR of 42 dB could be obtained in the 7th Nyquist zone (26.01 GHz).
Keyword (in Japanese) (See Japanese page) 
(in English) Digital to Analog converter / digital to RF / delta-sigma / 1-bit / image / transmitters / microwaves /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 216, MW2017-73, pp. 29-34, Sept. 2017.
Paper # MW2017-73 
Date of Issue 2017-09-14 (MW) 
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. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MW2017-73 Link to ES Tech. Rep. Archives: MW2017-73

Conference Information
Committee AP MW  
Conference Date 2017-09-21 - 2017-09-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Saitama University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave, Millimeter wave, Measurement, Antennas and Propagation 
Paper Information
Registration To MW 
Conference Code 2017-09-AP-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on the SNR in Higher Nyquist Zone of 1-Bit Band-Pass Delta-Sigma Modulator using Manchester Coding 
Sub Title (in English)  
Keyword(1) Digital to Analog converter  
Keyword(2) digital to RF  
Keyword(3) delta-sigma  
Keyword(4) 1-bit  
Keyword(5) image  
Keyword(6) transmitters  
Keyword(7) microwaves  
1st Author's Name Masafumi Kazuno  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Mizuki Motoyoshi  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Suguru Kameda  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
4th Author's Name Noriharu Suematsu  
4th Author's Affiliation Tohoku University (Tohoku Univ.)
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Date Time 2017-09-22 11:10:00 
Presentation Time 25 
Registration for MW 
Paper # IEICE-MW2017-73 
Volume (vol) IEICE-117 
Number (no) no.216 
Page pp.29-34 
#Pages IEICE-6 
Date of Issue IEICE-MW-2017-09-14 

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