Higher-order spectral analysis of complex signals
Signal Processing - Special section: Distributed source coding
IEEE Transactions on Communications
Interference cancellation enhancement through generalized widely linear equalization in QAM systems
IEEE Transactions on Wireless Communications
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A novel multiuser detector for direct sequence code division multiple access is proposed. The receiver performs iterated soft decision interference cancellation (ISDIC) based on multiuser interference suppression filters designed for minimization of the mean-square error. Assuming a complex modulation format, we show that the multiuser interference becomes rotationally variant in the course of the iterations. Regarding this rotational variance in the design of the multiuser interference suppression filter, the presented iterative multiuser detector achieves significant performance gains compared with conventional ISDIC employing a standard minimum mean-squared error filter which is optimum only for rotationally invariant multiuser interference