Adaptive minimum error-rate filtering design: A review
Signal Processing
IEEE Transactions on Wireless Communications
Minimum bit error rate multiuser detection for OFDM-SDMA using particle swarm optimization
ICIC'07 Proceedings of the intelligent computing 3rd international conference on Advanced intelligent computing theories and applications
Adaptive reduced-rank MIMO decoder for military communications
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Approximate minimum bit error rate equalization for fading channels
EURASIP Journal on Advances in Signal Processing - Special issue on advanced equalization techniques for wireless communications
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This paper looks at the linear reception of spatially multiplexed signals across MIMO channels. We address the problem of robustness in the presence of detrimental effects such as correlation and Ricean components. We consider the error-rate performance of MIMO linear filters as these can be used in purely linear receivers or as part of each stage in successive interference canceling (SIC) receivers. We know from multiuser detection theory that minimum error-rate (MER) linear receivers significantly outperform minimum mean-square error (MMSE) receivers when correlation is high; however, no direct method exist to design the MER receiver simply. We derive a scheme allowing a closed-form approximate solution to this problem. The solution is a good approximation to the true MER receiver upon fulfillment of a certain, easily checkable, channel-related condition. The algorithms are derived first for the two-input many-output case. A generalized scheme is provided for the case of arbitrary number of inputs and outputs. The performance gain compared with that MMSE is significant and evaluated for various correlated and Ricean channels and transmit power allocation strategies.