Differential codebook for a wireless network, MIMO beamforming system using same, and method of reducing a quantization error in a MIMO beamforming system for a wireless network using same

摘要

A differential codebook for a wireless network includes a plurality of codewords and [e1 . . . eNs] G as a center location of the plurality of codewords, where ek represents a column vector comprising a plurality of rows including a k-th row and in which an entry on the k-th row is one and entries on each of the plurality of rows except for the k-th row are zero, where G is any Ns by Ns unitary matrix including the identity matrix, and where Ns, represents a number of spatial streams in the wireless network. At least two of the plurality of codewords are symmetric about the center location.