Multiple-antenna-aided OFDM employing genetic-algorithm-assisted minimum bit error rate multiuser detection

• Published in: IEEE transactions on vehicular technology Vol. 54; no. 5; pp. 1713 - 1721
• Main Authors: Alias, M.Y., Sheng Chen, Hanzo, L.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.09.2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithm; Antennas; Applied sciences; Bit error rate; Character generation; Cost function; Decision feedback equalizers; Detection, estimation, filtering, equalization, prediction; Detectors; Exact sciences and technology; genetic; Genetic algorithms; Information, signal and communications theory; Mathematical analysis; minimum bit error rate; Mud; Multiaccess communication; Multiplexing; Multiuser detection; multiuser detector; OFDM; Optimization; Orthogonal Frequency Division Multiplexing; orthogonal frequency division multiplexing (OFDM); Receivers; Receiving antennas; Signal and communications theory; Signal, noise; space division multiple-access (SDMA); Telecommunications and information theory; Vectors (mathematics); Multiuser detection; Performance evaluation; genetic; Bit error rate; Wireless telecommunication; space division multiple-access (SDMA); Algorithm; Space division multiple access; Simulation; minimum bit error rate; Genetic algorithm; multiuser detector; Orthogonal frequency division multiplexing; orthogonal frequency division multiplexing (OFDM)
• ISSN: 0018-9545; 1939-9359
• DOI: 10.1109/TVT.2005.851303

The family of minimum bit error rate (MBER) multiuser detectors (MUD) is capable of outperforming the classic minimum mean-squared error (MMSE) MUD in terms of the achievable bit-error rate (BER) owing to directly minimizing the BER cost function. In this paper, we will invoke genetic algorithms (GAs) for finding the optimum weight vectors of the MBER MUD in the context of multiple-antenna-aided multiuser orthogonal frequency division multiplexing (OFDM) . We will also show that the MBER MUD is capable of supporting more users than the number of receiver antennas available, while outperforming the MMSE MUD.