Layered space-time multiple-input multiple-output detector with parameterisable performance

This brief presents an improved layered space-time symbol detection algorithm for multiple-input multiple-output (MIMO) wireless systems. The proposed detection scheme utilises a different layer-ordering strategy than the so-called optimal ordering used in the conventional Bell Laboratories Layered Space-Time (BLAST) algorithm. To calculate the nulling vectors and their associated ordering, instead of using direct numerical techniques, the authors utilise a numerically stable iterative solution. It is shown that the performance of the proposed detector approaches closely that of an optimal maximum-likelihood detector at the expense of greater computational complexity compared with BLAST. Utilising the proposed parameterisable detector, one can trade off between the computational requirement and the error-rate performance.