In this paper we address the problem of blind recovery of multiple OFDM data streams in a Multiple-Input Multiple-Output (MIMO) system. We propose an equalization algorithm which is based on a combined criterion designed to cancel both intersymbol interference (ISI) and co-channel interference (CCI). ISI is minimized by using a modified Vector Constant Modulus criterion while CCI is minimized by a decorrelation criterion. We establish conditions

In this paper we introduce a Riemannian algorithm for minimizing (or maximizing) a real-valued function {mathcal J} of complex-valued matrix argument {mathbf W} under the constraint that {mathbf W} is an n×n unitary matrix. This type of constrained optimization problem arises in many array and multi-channel signal processing applications. We propose a conjugate gradient (CG) algorithm on the Lie group of unitary matrices $U(n)$. The algorithm fully

In many engineering applications we deal with constrained optimization problems with respect to complex-valued matrices. This paper proposes a Riemannian geometry approach for optimization of a real-valued cost function {mathcal J} of complex-valued matrix argument {mathbf W}, under the constraint that {mathbf W} is an $n times n$ unitary matrix. We derive steepest descent (SD) algorithms on the Lie group of unitary matrices $U(n)$. The proposed

The diffusion of suddenly occurring local high temperature in homogeneous half-infinite space is studied in the cases of one, two and threedimensional half space. Comparison of the three cases is made. Applications of theoretically analyzed models are suggested. Errors induced by assumptions are evaluated.