IMPROVED HOCHWALD CONSTRUCTION OF UNITARY MATRIX CODEBOOKS VIA EIGEN COORDINATE TRANSFORMATIONS

摘要

A method of deriving a codebook including deriving a first codeword P, in Euclidean coordinates, transforming the first codeword into eigen-coordinates, applying Hochwald construction to the first codeword in eigen­ coordinates to derive a plurality of codewords in eigen­coordinates and transforming the plurality of codewords in eigen-coordinates into a plurality of codewords in Euclidean coordinates to form the codebook.