H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 13/02 (2006.01) H04J 11/00 (2006.01) H04J 13/00 (2006.01)
Patent
CA 2340760
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.
L'invention concerne un procédé de transmission appliqué à un système de communication qui possède des vecteurs de code orthogonaux (10) servant à transmettre des signaux de message. Le procédé consiste à former une première matrice de vecteurs en utilisant une première série de décalages circulaires et à former une deuxième matrice de vecteurs en utilisant une deuxième série de décalages circulaires. L'invention concerne aussi l'utilisation d'opérations de permutation déterminées à des fins d'obtention d'un vecteur de code quasi orthogonal (50). Le vecteur de code quasi orthogonal (50) est appliqué à un signal de message pour fournir un signal de message codé, qui sera ensuite transmis. La formation de la première matrice de vecteurs comprend les décalages circulaires d'une séquence possédant un polynôme caractéristique.
Qualcomm Incorporated
Smart & Biggar
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