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Paper Abstract and Keywords
Presentation 2007-05-25 13:50
A/D Converter Clipping Noise Suppression for High-Sensitivity Carrier-Sensing of Cognitive Radio Transceiver
Tazuko Tomioka, Ren Sakata, Tomoya Horiguchi, Takeshi Tomizawa, Kaoru Inoue (Toshiba) SR2007-16
Abstract (in Japanese) (See Japanese page) 
(in English) A technique for suppressing the clipping noise of an analogue to digital converter (ADC) is proposed to achieve the high-sensitivity carrier-sensing of a cognitive radio transceiver. When a large bandwidth cognitive radio transceiver performs carrier-sensing, it must receive a radio wave that includes many primary user transmissions. The radio wave may have high peak to average power ratio and clipping noise may be generated. Clipping noise becomes an obstacle to the achievement of high-sensitivity carrier-sensing. In the proposed technique, the original values of the samples clipped by an ADC are estimated by interpolation. Polynomial spline interpolation to the clipped signal is performed in the first step, and then SINC function interpolation is applied to the spline interpolated signal. The performance was evaluated and about 20 dB suppression of clipping noise was achieved with the medium degree of clipping. With this technique, quantization bits may be reduced by about two bits depending on the assumed margin.
Keyword (in Japanese) (See Japanese page) 
(in English) Cognitive Radio / Carrier-Sensing / Analogue-to-Digital Converter / Clipping / Interpolation / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 69, SR2007-16, pp. 93-98, May 2007.
Paper # SR2007-16 
Date of Issue 2007-05-17 (SR) 
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)
Download PDF SR2007-16

Conference Information
Committee SR  
Conference Date 2007-05-24 - 2007-05-25 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SR 
Conference Code 2007-05-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A/D Converter Clipping Noise Suppression for High-Sensitivity Carrier-Sensing of Cognitive Radio Transceiver 
Sub Title (in English)  
Keyword(1) Cognitive Radio  
Keyword(2) Carrier-Sensing  
Keyword(3) Analogue-to-Digital Converter  
Keyword(4) Clipping  
Keyword(5) Interpolation  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Tazuko Tomioka  
1st Author's Affiliation Toshiba Corp. (Toshiba)
2nd Author's Name Ren Sakata  
2nd Author's Affiliation Toshiba Corp. (Toshiba)
3rd Author's Name Tomoya Horiguchi  
3rd Author's Affiliation Toshiba Corp. (Toshiba)
4th Author's Name Takeshi Tomizawa  
4th Author's Affiliation Toshiba Corp. (Toshiba)
5th Author's Name Kaoru Inoue  
5th Author's Affiliation Toshiba Corp. (Toshiba)
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Speaker Author-1 
Date Time 2007-05-25 13:50:00 
Presentation Time 25 minutes 
Registration for SR 
Paper # SR2007-16 
Volume (vol) vol.107 
Number (no) no.69 
Page pp.93-98 
#Pages 6 
Date of Issue 2007-05-17 (SR) 

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