Patent ID: 7583745

Claim:
A method comprising: calculating a respective channel quality indicator q k for at least one of K transmission channels k=1, . . . ,K with resrective N t,k transmission interfaces and resrective N r,k recertion interfaces, and scheduling at least one of said K transmission channels for the transmission of data symbols modulated according to a non-orthonormal matrix modulation that modulates data symbols in both a non-orthogonal spatial domain and at least one orthogonal domain, wherein at least one equivalent channel matrix G k can be defined that transforms said data symbols into data symbols that have been matrix modulated, transmitted over N t,k transmission interfaces and received at N r,k reception interfaces of one of said transmission channels k=1, . . . ,K, wherein an equivalent channel correlation matrix R k =G k H ·G k of said at least one equivalent channel matrix G k is not proportional to the identity matrix, and wherein said scheduling is at least partially based on said calculated channel quality indicators q k .