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Paper Abstract and Keywords
Presentation 2006-03-06 13:30
Adaptive Detection of Passband-Edge Frequencies of Band-Limited Signals
Kentaro Yamaguchi (Tokyo Tech.), Eiji Watanabe (Shibaura Tech.), Akinori Nishihara (Tokyo Tech.)
Abstract (in Japanese) (See Japanese page) 
(in English) A method to adaptively detect passband-edge frequencies (PEFs) of band-limited signals is proposed and applied to estimating bandwidth of narrow-band interference signals in spread spectrum (SS) communication systems. It is first shown that a conventional method cannot detect PEFs of general band-limited signals except for lowpass signals. To solve this problem, differentiated mean output power of second-order IIR notch filter is proposed as the objective function. It is minimized or maximized by stochastic gradient (SG) algorithm to detect PEFs. A structure of the proposed adaptive filters is then derived. Finally bandwidth of narrow-band interference in an SS communication system is estimated by simulation and the validity of the proposed method is confirmed.
Keyword (in Japanese) (See Japanese page) 
(in English) Band-Limited Signals / Passband-Edge Frequencies / Objective Function / Stochastic Gradient Algorithm / Narrow-Band Interference / / /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 633, CAS2005-101, pp. 31-36, March 2006.
Paper # CAS2005-101 
Date of Issue 2006-02-27 (CAS, SIP, CS) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee CAS SIP CS  
Conference Date 2006-03-06 - 2006-03-07 
Place (in Japanese) (See Japanese page) 
Place (in English) Univ of Ryukyu 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Network processors, signal processing for communications, coding theory, etc. 
Paper Information
Registration To CAS 
Conference Code 2006-03-CAS-SIP-CS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Adaptive Detection of Passband-Edge Frequencies of Band-Limited Signals 
Sub Title (in English)  
Keyword(1) Band-Limited Signals  
Keyword(2) Passband-Edge Frequencies  
Keyword(3) Objective Function  
Keyword(4) Stochastic Gradient Algorithm  
Keyword(5) Narrow-Band Interference  
1st Author's Name Kentaro Yamaguchi  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech.)
2nd Author's Name Eiji Watanabe  
2nd Author's Affiliation Shibaura Institute of Technology (Shibaura Tech.)
3rd Author's Name Akinori Nishihara  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech.)
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Speaker Author-1 
Date Time 2006-03-06 13:30:00 
Presentation Time 25 minutes 
Registration for CAS 
Paper # CAS2005-101, SIP2005-147, CS2005-94 
Volume (vol) vol.105 
Number (no) no.633(CAS), no.635(SIP), no.637(CS) 
Page pp.31-36 
Date of Issue 2006-02-27 (CAS, SIP, CS) 

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