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Paper Abstract and Keywords
Presentation 2020-06-29 10:45
Experimental Investigation of Energy Detection in an Outdoor Environment for Dynamic Spectrum Sharing at Millimeter Wave Bands
Hanpinitsak Panawit, Murakami Kosuke, Kang CheChia, Saito Kentaro, Takada Jun-ichi (Tokyo Tech) SRW2020-2
Abstract (in Japanese) (See Japanese page) 
(in English) The spectrum sharing scheme has been proposed to combat the frequency spectrum scarcity issues. Furthermore, as the amount of data-hungry applications keeps increasing, this scheme may be utilized in the millimeter-wave bands which have been allocated for International Mobile Telecommunications (IMT). Thus, this paper presents the preliminary investigation of the energy detector in an outdoor environment at 25.19 GHz band. For the developed portable receiver (Rx) system, the 10 dBi or 20 dBi horn antenna was mounted on the stepper motor, which rotates in the horizontal direction and was controlled by the Arduino and motor driver via the PC. The antenna was connected to the handy spectrum analyzer (SA) to measure the power spectrum. The SA was also attached to the GPS module to obtain the spatial position. In the measurement, the transmitter (Tx) was the commercial low power data communication system located on the rooftop of a 14 m height building. It has the gain and half power beamwidth of 31.5 dBi and 4 degrees, respectively. The aperture of the Tx was directed horizontally and parallel to the street in front of the building. The Rx was put on a cart and positioned along the same street. Thus, it was within the line-of-sight (LOS) of the Tx. At each position, the GPS coordinates and power spectra at different azimuth angles were recorded. The test statistics of each angle were then computed from the maximum value of the spectrum over the frequency span. The results showed that almost only the LOS signal could be observed for the 10 dBi antenna. On the contrary, both LOS and backscattering components from the building opposite of the Tx were detected for the 20 dBi antenna. The LOS was the dominant mechanism when the Rx was located more than roughly 70 m from the Tx. In other positions, the backscattering paths were the major mechanism. However, in these positions, the LOS signal could be detected slightly easier in the case of the 10 dBi antenna due to the wider antenna beamwidth. This implied that if the backscattering signals were not present, the antenna with narrower beamwidth should be suitable for detection when the sensor is sufficiently far from the Tx. In other cases, the wider beamwidth antenna should be a better choice.
Keyword (in Japanese) (See Japanese page) 
(in English) Spectrum Sharing / Millimeter Wave / Energy Detector / / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 81, SRW2020-2, pp. 3-3, June 2020.
Paper # SRW2020-2 
Date of Issue 2020-06-22 (SRW) 
ISSN 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 SRW2020-2

Conference Information
Committee SRW  
Conference Date 2020-06-29 - 2020-06-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) WLAN, WPAN, Ad-hoc, mmWave, etc. 
Paper Information
Registration To SRW 
Conference Code 2020-06-SRW 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Experimental Investigation of Energy Detection in an Outdoor Environment for Dynamic Spectrum Sharing at Millimeter Wave Bands 
Sub Title (in English)  
Keyword(1) Spectrum Sharing  
Keyword(2) Millimeter Wave  
Keyword(3) Energy Detector  
1st Author's Name Hanpinitsak Panawit  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Murakami Kosuke  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
3rd Author's Name Kang CheChia  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
4th Author's Name Saito Kentaro  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
5th Author's Name Takada Jun-ichi  
5th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
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Speaker Author-1 
Date Time 2020-06-29 10:45:00 
Presentation Time 15 minutes 
Registration for SRW 
Paper # SRW2020-2 
Volume (vol) vol.120 
Number (no) no.81 
Page p.3 
Date of Issue 2020-06-22 (SRW) 

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