Method and apparatus for transmission and construction of quasi orthogonal vectores

摘要

A transmission method in a communications system having orthogonal code vectors (10) for transmitting message signals. The method includes forming a first vector matrix using a first series of cyclic shifts and forming a second vector matrix using a second series of cyclic shifts. The first vector matrix is permuted to provide an orthogonal code and the permuting operations are determined. The method also sets forth applying the determined permuting operations to the second matrix to provide a quasi orthogonal code vector (50). The quasi orthogonal code vector (50) is applied to a message signal to provide an encoded message signal and the encoded message signal is transmitted. The forming of the first matrix vector includes cyclic shifts of a sequence having a characteristic polynomial.