Exploiting selection diversity in communications systems with non-orthonormal matrix and vector modulation

An apparatus comprising:

• a calculation module for calculating a respective channel quality indicator qk for at least one of K transmission channels k=1, . . . ,K with resrective Nt,k transmission interfaces and resrective Nr,k reception interfaces, and
• a scheduler for 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 Gk can be defined that transforms said data symbols into data symbols that have been matrix modulated, transmitted over Nt,k transmission interfaces and received at Nr,k reception interfaces of one of said transmission channels k=1, . . . ,K, wherein an equivalent channel correlation matrix Rk=GkH·Gk of said at least one equivalent channel matrix Gk is not proportional to the identity matrixsaid matrix modulated data symbols, and wherein said scheduling is at least partially based on said calculated channel quality indicators qk.

A method comprising:

• calculating a respective channel quality indicator qk for at least one of K transmission channels k=1, . . . ,K, wherein each transmission channel k has respective Nt,k transmission interfaces and resrective Nr,k reception interfaces and is defined by a respective channel matrix Hk, wherein at least two data symbols are transmitted in rarallel from Nt,k transmission interfaces of at least one of said K transmission channels, and wherein at least one of said respective channel quality indicators qk is calculated as a function of the determinant of a linear function of a channel correlation matrix HkH·Hk of said channel matrix Hk, and
• scheduling at least one of said K transmission channels for the transmission of said data symbols, wherein said scheduling is at least partially based on said calculated channel quality indicators qk.

An apparatus comprising:

• a calculation module for calculating a respective channel quality indicator qk for at least one of K transmission channels k=1, . . . ,K, wherein each transmission channel k has respective Nt,k transmission interfaces and respective Nr,k reception interfaces and is defined by a respective channel matrix Hk, wherein at least two data symbols are transmitted in parallel from Nt,k transmission interfaces of at least one of said K transmission channels, and wherein at least one of said respective channel quality indicators qk is calculated as a function of the determinant of a linear function of a channel correlation matrix HkH·Hk of said channel matrix Hk, and
• a scheduler for scheduling at least one of said K transmission channels for the transmission of said data symbols, wherein said scheduling is at least partially based on said calculated channel quality indicators qk.

An apparatus comprising:

• means for calculating a respective channel quality indicator qk for at least one of said K transmission channels k=1, . . . ,K with resrective Nt,k transmission interfaces and resrective Nr,k reception interfaces, and
• means for 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 Gk can be defined that transforms said data symbols into data symbols that have been matrix modulated, transmitted over Nt,k transmission interfaces and received at Nr,k reception interfaces of one of said transmission channels k=1, . . . ,K, wherein an equivalent channel correlation matrix Rk=GkH·Gk of said at least one equivalent channel matrix Gk is not proportional to the identity matrix, and wherein said scheduling is at least partially based on said calculated channel quality indicators qk.

An apparatus comprising:

• means for calculating a respective channel quality indicator qk for at least one of K transmission channels k=1, . . . ,K, wherein each transmission channel k has respective Nt,k transmission interfaces and respective Nr,k reception interfaces and is defined by a respective channel matrix Hk, wherein at least two data symbols are transmitted in parallel from Nt,k transmission interfaces of at least one of said K transmission channels, and wherein at least one of said respective channel quality indicators qk is calculated as a function of the determinant of a linear function of a channel correlation matrix HkH·Hk of said channel matrix Hk, and
• means for scheduling at least one of said K transmission channels for the transmission of said data symbols, wherein said scheduling is at least partially based on said calculated channel quality indicators qk.