Information: Join today and make your research activities more affordable! Technical workshop participation fees and annual registration fees are available at member rates.
Notice: [Important] Announcement of Changes to Registration Fee Payment and Manuscript Upload Procedures for IEICE Technical Meetings
IEICE Technical Committee Submission System
Conference Paper's Information		 Online Proceedings
[Sign in]
Tech. Rep. Archives
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2009-06-26 13:20
Investigations on optimum spreading factor in MC-CDMA MIMO multiplexing with frequency-domain QRM-MLD
Kazuki Kawaguchi, Kouji Nagatomi, Kenichi Higuchi (Tokyo Univ. of Science) RCS2009-47
Abstract (in Japanese) (See Japanese page) 
(in English) This paper investigates an optimum spreading factor in multicarrier code division multiple access (MC-CDMA) multiple input multiple output (MIMO) multiplexing with the proposed maximum likelihood detection (MLD), which reduces the computational complexity by using M-algorithm on the received signal after orthogonalization based on the QR decomposition of the product of the channel and spreading code matrices. Since there is a tradeoff relationship between increased frequency diversity and deteriorated accuracy in correct symbol selection in M-algorithm according to the increase in spreading factor value, there should be an optimum spreading factor which achieves minimum bit error rate (BER). From the computer simulation results, when the number of the transmit and receive antennas is 2 and 4 with 16QAM data modulation and the number of surviving symbol replicas per stage in M-algorithm of 128, the best spreading factor is 8 and 4, respectively. By using these best spreading factors, the received signal energy per bit-to-noise spectrum density ratio (Eb/N0) for the average BER of 10-3 is reduced by 6 and 2 dB for 2 and 4-antenna cases, respectively, comparing to the case without spreading.
Keyword (in Japanese) (See Japanese page) 
(in English) OFDM / MC-CDMA / MIMO / Spreading / Signal detection / Maximum likelihood detection / QR decomposition /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 105, RCS2009-47, pp. 107-112, June 2009.
Paper # RCS2009-47 
Date of Issue 2009-06-18 (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 RCS2009-47

Conference Information
Committee RCS  
Conference Date 2009-06-25 - 2009-06-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) First Presentation in IEICE Technical Committee, Railroad Communications, Inter-Vehicle Communications, Road to Vehicle Communications, Resource Control, Scheduling, Wireless Communication Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2009-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Investigations on optimum spreading factor in MC-CDMA MIMO multiplexing with frequency-domain QRM-MLD 
Sub Title (in English)  
Keyword(1) OFDM  
Keyword(2) MC-CDMA  
Keyword(3) MIMO  
Keyword(4) Spreading  
Keyword(5) Signal detection  
Keyword(6) Maximum likelihood detection  
Keyword(7) QR decomposition  
Keyword(8)  
1st Author's Name Kazuki Kawaguchi  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Kouji Nagatomi  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
3rd Author's Name Kenichi Higuchi  
3rd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
4th Author's Name  
4th Author's Affiliation ()
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
21st Author's Name  
21st Author's Affiliation ()
22nd Author's Name  
22nd Author's Affiliation ()
23rd Author's Name  
23rd Author's Affiliation ()
24th Author's Name  
24th Author's Affiliation ()
25th Author's Name  
25th Author's Affiliation ()
26th Author's Name / /
26th Author's Affiliation ()
()
27th Author's Name / /
27th Author's Affiliation ()
()
28th Author's Name / /
28th Author's Affiliation ()
()
29th Author's Name / /
29th Author's Affiliation ()
()
30th Author's Name / /
30th Author's Affiliation ()
()
31st Author's Name / /
31st Author's Affiliation ()
()
32nd Author's Name / /
32nd Author's Affiliation ()
()
33rd Author's Name / /
33rd Author's Affiliation ()
()
34th Author's Name / /
34th Author's Affiliation ()
()
35th Author's Name / /
35th Author's Affiliation ()
()
36th Author's Name / /
36th Author's Affiliation ()
()
Speaker Author-1 
Date Time 2009-06-26 13:20:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2009-47 
Volume (vol) vol.109 
Number (no) no.105 
Page pp.107-112 
#Pages 6 
Date of Issue 2009-06-18 (RCS) 

[Return to Top Page]

[Return to IEICE Web Page]
The Institute of Electronics, Information and Communication Engineers (IEICE), Japan