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Paper Abstract and Keywords
Presentation 2013-08-30 15:50
Interference Control Method Between Primary and Secondary System Using load Modulation
Takuma Ito, Naoki Honma, Keisuke Terasaki (Iwate Univ.), Kentaro Nishimori (Niigata Univ.), Yoshitaka Tsunekawa (Iwate Univ.) AP2013-79
Abstract (in Japanese) (See Japanese page) 
(in English) Controlling interference from the secondary system (SS) to the receiver of the primary system (PS) is important issues when the SS uses the same frequency band in the area of television broadcast system. The reason includes that the SS cannot know the interference channel to the primary receiver (Rx), which does not have a transmitter. In this paper, we propose the interference control method between Rx and SS, where a load modulation scheme is introduced to Rx. In this method, the signal from the transmitter station is scattered by switching load impedance at Rx which does not emit radio waves. Also, SS estimates the scattered channel and calculates the interference suppression weights for transmitting, and controls interference by transmit beamforming at SS. Based on the simulation, it is found the Signal-to-Interference Ratio (SIR) with interference control is improved by up to 34.8 dB compared to that without interference control at a short distance, and it is confirmed that the proposed method using load modulation is effective in controlling interference between Rx and SS. Furthermore, we evaluate the Signal-to-Noise Ratio (SNR) and channel capacity at SS in the case of controlling transmit power of SS.
Keyword (in Japanese) (See Japanese page) 
(in English) Load modulation / Frequency sharing / Interference control / Channel capacity / / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 192, AP2013-79, pp. 95-100, Aug. 2013.
Paper # AP2013-79 
Date of Issue 2013-08-22 (AP) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
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 AP  
Conference Date 2013-08-29 - 2013-08-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Yokosuka 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Metamatarial, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2013-08-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Interference Control Method Between Primary and Secondary System Using load Modulation 
Sub Title (in English)  
Keyword(1) Load modulation  
Keyword(2) Frequency sharing  
Keyword(3) Interference control  
Keyword(4) Channel capacity  
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1st Author's Name Takuma Ito  
1st Author's Affiliation Iwate University (Iwate Univ.)
2nd Author's Name Naoki Honma  
2nd Author's Affiliation Iwate University (Iwate Univ.)
3rd Author's Name Keisuke Terasaki  
3rd Author's Affiliation Iwate University (Iwate Univ.)
4th Author's Name Kentaro Nishimori  
4th Author's Affiliation Niigata University (Niigata Univ.)
5th Author's Name Yoshitaka Tsunekawa  
5th Author's Affiliation Iwate University (Iwate Univ.)
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Speaker Author-1 
Date Time 2013-08-30 15:50:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2013-79 
Volume (vol) vol.113 
Number (no) no.192 
Page pp.95-100 
#Pages 6 
Date of Issue 2013-08-22 (AP) 

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