eprintid: 400
rev_number: 6
eprint_status: archive
userid: 5
dir: disk0/00/00/04/00
datestamp: 2007-04-10
lastmod: 2013-07-04 11:29:13
status_changed: 2013-07-04 11:29:13
type: techreport
metadata_visibility: show
item_issues_count: 0
creators_name: Sacchi, Claudio
creators_name: D'Orazio, Leandro
creators_name: Donelli, Massimo
creators_name: Fedrizzi, Riccardo
creators_name: Massa, Andrea
title: Genetic Algorithm-assisted Maximum-Likelihood Multi-user Detection for Multi-Rate MC-CDMA Systems
ispublished: submitted
subjects: TU
full_text_status: public
abstract: In this letter , the use of Genetic Algorithms (GAs) has been investigated in order to implement a computationally tractable Multi-User Detection (MUD) for synchronous multi-rate Multi-Carrier-Code-Division-Multiple-Access (MR MC-CDMA) systems. It is known that MC-CDMA performances can be seriously limited by multi-user interference. This is particularly true in the case of multi-rate systems where some users could exploit a reduced diversity against multipath channel distortions. The use of Genetic Algorithms (GAs) is therefore proposed as a sub-optimal solution to the MUD problem in a multi-rate Variable-Spreading-Length (VSL) MC-CDMA downlink transmission. A set of selected numerical experiments have been reported and discussed in order to assess the capability of the proposed GA-based approach. The reported results, obtained with an affordable computational burden, have shown a near-optimum behavior of the proposed GA-based MUD.
date: 2007-03
date_type: published
institution: University of Trento
department: informaticat
refereed: FALSE
referencetext: [1] E. Dahlman, P. Beming, J. Knutson, F. Ovesjo, M. Persson, and C. Roobol, “W-CDMA – The Radio 
Interface for Future Mobile Multimedia Communications”, IEEE Trans. on Veh. Technol., vol.47, 
no.4, pp.1105-1118, Nov.1998. 
[2] P-W Fu, and K-C. Chen, “Multi-Rate Multi-Carrier CDMA with Multiuser Detection for Wireless 
Multimedia Communications”, Proc of 2003 IEEE Wireless Commun. and Networking Conf.(WCNC 
2003), New Orleans (LA) , March 16-20, 2003, vol.1, pp.385-390. 
[3] J. Li, K.B. Letaief, and Z. Cao, “Reduced Complexity MAP-Based Iterative Multiuser Detection for 
Coded Multicarrier CDMA Systems”, IEEE Trans. Comm., vol.52, no.11, pp. 1909-1915, Nov. 2004. 
[4] F. Petré, P. Vandenameele, A. Bourdoux, B. Gyselincks, M. Engels, M. Moonen, and H. De Man, 
“Combined MMSE/pcPIC multiuser detection for MC-CDMA”, Proc. of IEEE 51st Conf. on Vehicular 
Tech. 2000 (VTC-Spring 2000), Tokyo (JP), May 15-18, 2000, vol.2, pp.770-774.
[5] T. Zemen, C.F. Mecklembraucker, J. Wehinger, and R.R. Muller, “Iterative Joint Time-Variant 
Channel Estimation and Multi-User Detection for MC-CDMA”, IEEE Trans on Veh. Technol., vol.5, 
no.6, pp. 1469-1478, Jun. 2006. 
[6] V. Kuhn, “Iterative Interference Cancellation and Channel Estimation for Coded OFDM-CDMA”, 
Proc. of 2003 IEEE Int. Conf. on Commun. (ICC 2003)., Anchorage (AK), vol. 4, May 2003, pp. 
2465–2469. 
[7] M. Tan, and Y. Bar-Ness, “Equal BER Power Control for Uplink MC-CDMA with MMSE Successive 
Interference Cancellation”, IEEE Comm. Letters, vol.8, no.6, pp. 348-350, Jun. 2004. 
[8] D.E. Goldberg, Genetic Algorithms in Search, Optimization and Machine Learning, Addison-Wesley, 
Reading, MA: 1999. 
[9] H. Wei, and L. Hanzo, “Reduced-Complexity Near-Optimum Genetic Algorithm Assisted Multiuser 
Detection for Synchronous Multicarrier CDMA”, Proc. of 59th IEEE Veh. Technol. Conf. 2004 (VTC 
Spring – 2004), Milan (I), May 17-19, 2004, vol.3, pp. 1717-1721. 
[10] Z. Li, M.J. Juntti, and M. Latva-Aho, “Genetic Algorithm Based Frequency Domain Multiuser 
Detection for MC-CDMA Systems”, Proc. of 61st IEEE Veh. Technol. Conf. 2005 (VTC-Spring -
2005), Stockholm (S), May 30 2005, vol. 2, pp. 983-987. 
[11] Y.R. Tsoy, “The Influence of Population Size and Search Time Limit on Genetic Algorithm”, Proc. of 
the 7th Korea-Russia International Symposium on Science and Technology (KORUS 2003), Uslan 
(KOR), Jun. 28-Jul. 6 2003, vol. 3, pp. 181-187. 
[12] S. Hara, R. Prasad, “Overview of multicarrier CDMA”, IEEE Comm. Mag., pp.126-133, Dec. 1997. 
[13] “3rd Generation Partnership Project;Technical Specification Group Radio Access Network; UE 
Radio Transmission and Reception (FDD) (Release 5)”, ETSI Technical Report 3GPP TS 25.101, 
v5.5.0, December 2002. 
citation:   Sacchi, Claudio and D'Orazio, Leandro and Donelli, Massimo and Fedrizzi, Riccardo and Massa, Andrea  (2007) Genetic Algorithm-assisted Maximum-Likelihood Multi-user Detection for Multi-Rate MC-CDMA Systems.  [Technical Report]    (Submitted)  
document_url: http://www.eledia.org/students-reports/400/1/DIT-07-008.pdf