METHOD AND APPARATUS FOR TRANSMISSION AND CONSTRUCTION OF QUASI ORTHOGONAL VECTORS

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 seco nd vector matrix using a second series of cyclic shifts. The first vector matri x 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 t o provide an encoded message signal and the encoded message signal is transmitted. The forming of the first matrix vector includes cyclic shifts o f a sequence having a characteristic polynomial.