Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2011, Article ID 351494, 12 pages doi: Research Article A Near-Optimum Multiuser Receiver for STBC MC-CDMA Systems Based on Minimum Conditional BER Criterion and Genetic Algorithm-Assisted Channel Estimation Leandro D’Orazio,1 Claudio Sacchi,2 Massimo Donelli,2 J´ rˆ me Louveaux (EURASIP Member),3 and Luc Vandendorpe3 e o 1 Centro Ricerche FIAT (CRF), Trento Branch, Via della Stazione 27, 38123 Trento, Italy Engineering and Computer Science Department (DISI), University of Trento, Via Sommarive 14, 38123 Trento, Italy 3 Laboratoire de T´l´communications et T´l´d´tection, Universit´ Catholique de Louvain, Place du Levant 2, ee ee e e 1348. | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2011 Article ID 351494 12 pages doi 2011 351494 Research Article A Near-Optimum Multiuser Receiver for STBC MC-CDMA Systems Based on Minimum Conditional BER Criterion and Genetic Algorithm-Assisted Channel Estimation Leandro D Orazio 1 Claudio Sacchi 2 Massimo Donelli 2 Jerome Louveaux EURASIP Member 3 and Luc Vandendorpe3 1 Centro Ricerche FIAT CRF Trento Branch Via della Stazione 27 38123 Trento Italy 2Information Engineering and Computer Science Department DISI University of Trento Via Sommarive 14 38123 Trento Italy 3Laboratoire de Telecommunications et Teledetection Universite Catholique de Louvain Place du Levant 2 1348 Louvain-la-Neuve Belgium Correspondence should be addressed to Claudio Sacchi sacchi@ Received 1 December 2010 Accepted 7 March 2011 Academic Editor Alexey Vinel Copyright 2011 Leandro D Orazio et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. The implementation of efficient baseband receivers characterized by affordable computational load is a crucial point in the development of transmission systems exploiting diversity in different domains. This would be a crucial point in the future development of 4G systems where space time and frequency diversity will be combined together in order to increase system throughput. In this framework a linear multiuser detector for MC-CDMA systems with Alamouti s Space-Time Block Coding STBC which is inspired by the concept of Minimum Conditional Bit Error Rate MCBER is proposed. The MCBER combiner has been implemented in adaptive way by using Least-Mean-Square LMS optimization. The estimation of Channel State Information CSI necessary to make practically feasible the MCBER detection is aided by a Genetic Algorithm GA . The .
