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An adaptive semi-blind Space-Time Equaliser (STE) has recently been proposed based on a concurrent gradient-Newton constant modulus algorithm and soft decision-directed scheme for dispersive Multiple-Input Multiple-Output (MIMO) systems that employ high-throughput quadrature amplitude modulation signalling. The authors investigate the performance of this adaptive semi-blind STE operating in Rayleigh fading MIMO systems. The results obtained show that the tracking performance of this semi-blind adaptive algorithm is close to that of the training-based recursive least squares algorithm. This paper, therefore, demonstrates that the proposed semi-blind algorithm offers a practical means to adapt a STE in the hostile dispersive Rayleigh fading MIMO environment.
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