Novel adaptive blind-equalizer-order selection scheme for multiple-input multiple-output channels

This paper introduces a novel adaptive finite impulse-response (FIR) equalizer-order selection scheme for multiple-input multiple-output (MIMO) channels. The model-order selection for blind FIR equalizers is determined heuristically but hardly on any theoretical basis. However, this heuristical strategy would often lead to a suboptimal solution. Thus, we design a non-pilot-aided MIMO channel-length estimation scheme and propose a new blind-equalizer-order determination scheme built on such an adaptive channel-length estimation method. Our simulations show that the proposed scheme greatly outperforms the conventional systems using the fixed heuristical model-order selection technique.