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Paper Abstract and Keywords
Presentation 2006-10-20 17:05
Interference Cancellation Technique based on Discovery of Spreading Codes of Interference Signals and Maximum Correlation Detection for DS/CDMA System
Ranga Hettiarachchi, Mitsuo Yokoyama, Hideyuki Uehara (Toyohashi Uni. Tech.)
Abstract (in Japanese) (See Japanese page) 
(in English) Multiple access interference (MAI) limits the performance of DS/CDMA systems. This paper presents a new interference canceller based on discovery of spreading codes of interference signals and maximum correlation detection for downlink channel.
The PN synchronization system which has the ability to discover unknown PN sequences used for interference signals is applied here. Then we provide all the patterns of interference signals taking each combination of data +1 and -1, and store them as an undesired-signal matrix U. Then, we take correlation between the received signal and each vector in U so as to find which combination vector takes the maximum value. The maximum correlation vector is considered as the interference signal and MAI cancellation is carried out by subtracting it from the received signal. The proposed system has shown remarkable quality enhancement even signal powers differ.
Keyword (in Japanese) (See Japanese page) 
(in English) DS-CDMA / PN sequence / MAI / Maximum correlation detection / / / /  
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Conference Information
Committee SAT  
Conference Date 2006-10-19 - 2006-10-20 
Place (in Japanese) (See Japanese page) 
Place (in English) KAL Hotel (Jeju-Do, Korea) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Satellite Communications, etc. (JC-SAT2006) 
Paper Information
Registration To SAT 
Conference Code 2006-10-SAT 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Interference Cancellation Technique based on Discovery of Spreading Codes of Interference Signals and Maximum Correlation Detection for DS/CDMA System 
Sub Title (in English)  
Keyword(1) DS-CDMA  
Keyword(2) PN sequence  
Keyword(3) MAI  
Keyword(4) Maximum correlation detection  
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1st Author's Name Ranga Hettiarachchi  
1st Author's Affiliation Toyohashi University of Technology (Toyohashi Uni. Tech.)
2nd Author's Name Mitsuo Yokoyama  
2nd Author's Affiliation Toyohashi University of Technology (Toyohashi Uni. Tech.)
3rd Author's Name Hideyuki Uehara  
3rd Author's Affiliation Toyohashi University of Technology (Toyohashi Uni. Tech.)
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Speaker Author-1 
Date Time 2006-10-20 17:05:00 
Presentation Time 25 minutes 
Registration for SAT 
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