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| High quality mobile services have to eliminate multiple-access interference (MAI) and multipath inference that affect CDMA systems receivers. To this purpose, MMSE space-time multiuser detection has been proposed [1]. However, they usually need more complexity computation in receivers. Therefore, in such case, a low-complexity MMSE detector is required. In this paper, we adopt the Lagrange multipliers method and extend the constraint space, and present an adaptive MMSE space-time multiuser detector. Simulation results show that the scheme can offer significant performance enhancement over the conventional MMSE detection method. |
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| Keywords:space-time, multiuser detection, low-complexity, algorithm, CDMA systems |
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