Lattice-reduction-aided MIMO detection under imperfect channel state information

Lattice-reduction (LR) has recently emerged as a promising technique for MIMO detection. Through lattice reduction, the original MIMO channel can be transformed into an equivalent one with better condition and result in the improved performance. Since all the LR-aided detectors require the prior knowledge of the instant channel state information (CSI) which can only be estimated in practice, the accuracy of the estimated CSI directly affects the attainable performance. In this paper, we present a new class of LR-aided MIMO detectors (ICSI-LRAD) which is capable of improving the performance of the conventional LRADs by exploiting the second-order-statistics of the channel estimation. The performance of the proposed ICSI-LRADs under different amount of prior information has been demonstrated and quantified through extensive computer simulations.