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Paper Abstract and Keywords
Presentation 2019-03-08 10:55
[Invited Lecture] Direct RF Undersampling Receiver for Wireless IoT Real-time Spectrum Monitor using High-speed Clock Switching
Tomoyuki Furuichi, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu (Tohoku Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, with the popularization of wireless IoT (Internet of Things), real time frequency sensing technology for multi bands (920 MHz band, 2.4 GHz band, 5-6 GHz band) used by wireless IoT devices is required. We have proposed a direct RF undersampling receiver for real-time spectrum monitoring. It has a multi-band characteristic that can monitor the wireless IoT frequency bands with a sampling clock of several hundred MHz with single receiver and real-time characteristic that can capture millisecond class signals without missed observing. The proposed receiver achieves multi-band characteristic by sampling several times with switch the sampling clock. In this report, the real-time characteristic of the proposed receiver is calculated and it is evaluated by an experiment using the pulse pattern generator as the high-speed variable clock source. In addition, aliasing noise due to undersampling in the proposed receiver is estimated and it is confirmed that the required SNR for spectrum monitor can be secured.
Keyword (in Japanese) (See Japanese page) 
(in English) IoT / Spectrum Sensing / Cognitive Radio / Undersampling / Digital RF / Microwaves / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 475, SR2018-139, pp. 103-109, March 2019.
Paper # SR2018-139 
Date of Issue 2019-02-27 (SR) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee RCS SR SRW  
Conference Date 2019-03-06 - 2019-03-08 
Place (in Japanese) (See Japanese page) 
Place (in English) YRP 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To SR 
Conference Code 2019-03-RCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Direct RF Undersampling Receiver for Wireless IoT Real-time Spectrum Monitor using High-speed Clock Switching 
Sub Title (in English)  
Keyword(1) IoT  
Keyword(2) Spectrum Sensing  
Keyword(3) Cognitive Radio  
Keyword(4) Undersampling  
Keyword(5) Digital RF  
Keyword(6) Microwaves  
1st Author's Name Tomoyuki Furuichi  
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 2019-03-08 10:55:00 
Presentation Time 25 
Registration for SR 
Paper # IEICE-SR2018-139 
Volume (vol) IEICE-118 
Number (no) no.475 
Page pp.103-109 
#Pages IEICE-7 
Date of Issue IEICE-SR-2019-02-27 

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