Adaptive blind multiuser detection over flat fast fading channels using particle filtering
EURASIP Journal on Wireless Communications and Networking - Special issue on advanced signal processing algorithms for wireless communications
Journal of VLSI Signal Processing Systems
Improved multiuser detectors employing genetic algorithms in a space-time block coded system
EURASIP Journal on Applied Signal Processing
A Watermarking Method with a New SS Technique
ICCS '07 Proceedings of the 7th international conference on Computational Science, Part III: ICCS 2007
IEEE Communications Letters
Genetic algorithm based equalization for direct sequence ultra-wideband communications systems
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Evolutionary hidden information detection by granulation-based fitness approximation
Applied Soft Computing
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A novel multiuser code division multiple access (CDMA) receiver based on genetic algorithms is considered, which jointly estimates the transmitted symbols and fading channel coefficients of all the users. Using exhaustive search, the maximum likelihood (ML) receiver in synchronous CDMA systems has a computational complexity that is exponentially increasing with the number of users and, hence, is not a viable detection solution. Genetic algorithms (GAs) are well known for their robustness in solving complex optimization problems. Based on the ML rule, GAs are developed in order to jointly estimate the users' channel impulse response coefficients as well as the differentially encoded transmitted bit sequences on the basis of the statistics provided by a bank of matched filters at the receiver. Using computer simulations, we showed that the proposed receiver can achieve a near-optimum bit-error-rate (BER) performance upon assuming perfect channel estimation at a significantly lower computational complexity than that required by the ML optimum multiuser detector. Furthermore, channel estimation can be performed jointly with symbol detection without incurring any additional computational complexity and without requiring training symbols. Hence, our proposed joint channel estimator and symbol detector is capable of offering a higher throughput and a shorter detection delay than that of explicitly trained CDMA multiuser detectors