Subspace projection based blind channel order estimation of MIMO systems

A novel algorithm based on subspace projections is developed for blindly estimating the discrete orders of a linear finite-impulse-response (FIR) multiple-input multiple-output (MIMO) system, the number of subsystems that attain each other and the total number of inputs. Simulations in the context of blind channel order estimation show good performance in comparison to existing schemes developed for single-input multiple-output (SIMO) systems.