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Paper Abstract and Keywords
Presentation 2009-11-27 10:30
A Blind Single Antenna Interference Cancellation Algorithm for Asynchronous OFDM Communication Systems
Zhenyu Zhou, Takuro Sato (Waseda Univ.) RCS2009-154
Abstract (in Japanese) (See Japanese page) 
(in English) In orthogonal frequency division multiplexing (OFDM) based cellular systems, co-channel interference (CCI) from adjacent interfering base stations (BSs) operating and co-existing with the desired BS in the same frequency channel would greatly degrade the bit error rate (BER) performance of mobile receivers which are near to cell borders.
CCI cancellation algorithms by using only one receiving antenna named single antenna interference cancellation (SAIC) have been under intense research. However, most of these algorithms require additional information from interfering signals. Furthermore, the orthogonality of a asynchronous interfering signal is destroyed and therefore, conventional SAIC algorithms cannot be applied. In this paper, we propose a blind SAIC algorithm named least mean square-blind joint maximum likelihood sequence estimation (LMS-BJMLSE) for asynchronous interference cancellation. The proposed LMS-BJMLSE algorithm is blind with respect to interfering signals and neither the training sequence (TS) nor pilot signal from interfering signals is needed. Its complexity is independent of channel length compared to the conventional time domain JMLSE algorithm. Simulation results show that the proposed LMS-BJMLSE algorithm could greatly improve the BER performance in both synchronous and asynchronous interference conditions. In the second part, both the upper and lower bounds for JMLSE based MQAM-OFDM systems are derived. A tighter lower bound is given by replacing the smart genie with a less generous one. This lower bound is valid for any MQAM and an arbitrary number of interferers.
Keyword (in Japanese) (See Japanese page) 
(in English) LMS-BJMLSE / BER Bounds / OFDM / SAIC / CCI / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 305, RCS2009-154, pp. 127-132, Nov. 2009.
Paper # RCS2009-154 
Date of Issue 2009-11-19 (RCS) 
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)
Download PDF RCS2009-154

Conference Information
Committee RCS AP  
Conference Date 2009-11-26 - 2009-11-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Inst. of Tech. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Adaptive Antenna, Equalization, Interference Canceller, MIMO, Wireless Communication Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2009-11-RCS-AP 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Blind Single Antenna Interference Cancellation Algorithm for Asynchronous OFDM Communication Systems 
Sub Title (in English)  
Keyword(1) LMS-BJMLSE  
Keyword(2) BER Bounds  
Keyword(3) OFDM  
Keyword(4) SAIC  
Keyword(5) CCI  
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1st Author's Name Zhenyu Zhou  
1st Author's Affiliation Waseda University (Waseda Univ.)
2nd Author's Name Takuro Sato  
2nd Author's Affiliation Waseda University (Waseda Univ.)
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Speaker Author-1 
Date Time 2009-11-27 10:30:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2009-154 
Volume (vol) vol.109 
Number (no) no.305 
Page pp.127-132 
#Pages 6 
Date of Issue 2009-11-19 (RCS) 

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