Apparatus and method for transmitting and receiving data in...

H - Electricity – 04 – B

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H04B 7/216 (2006.01) H04J 11/00 (2006.01) H04J 13/00 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2360367

A method for assigning orthogonal codes used for a first system and a second system in a CDMA system including channels of the first system for spreading a pilot signal, a sync signal, a paging signal and a traffic signal with a first set of orthogonal codes corresponding to orthogonal code numbers in different rows from a set of orthogonal codes arranged in a matrix of m rows and m columns, and channels of the second system for spreading a second set of orthogonal codes corresponding to orthogonal code numbers different from said orthogonal code numbers for the first set of orthogonal codes. The orthogonal codes for the second system are transmitted at a data rate higher than a data rate of the first system. The method comprises the steps of: assigning orthogonal codes corresponding to the orthogonal code numbers of the orthogonal code set associated with at least one of 2n rows to the channels of the first system, wherein a set of the orthogonal codes are arranged in a matrix of subsets of orthogonal codes and inversed orthogonal codes, each subset including 2n rows and 2n columns; and assigning orthogonal codes corresponding to the orthogonal code numbers of the orthogonal code set associated with at least one of the remaining rows to the second system.

L'invention porte sur un procédé d'attribution de codes orthogonaux utilisés pour un premier et un second système dans un système AMDC comprenant des canaux du premier système en vue d'étaler un signal pilote, un signal de synchronisation et un signal de trafic avec un premier ensemble de codes orthogonaux correspondant à des numéros de codes orthogonaux dans différentes rangées d'un ensemble de codes orthogonaux disposés dans une matrice de m rangées et m colonnes, et des canaux du second système pour étaler un second ensemble de codes orthogonaux correspondant à des numéros de codes orthogonaux différents de ceux du premier ensemble. Les codes orthogonaux du second système sont transmis à une vitesse supérieure à celle du premier système. Le procédé consiste à attribuer des codes orthogonaux correspondant aux codes orthogonaux de l'ensemble associé à au moins une des 2n rangées par rapport aux canaux du premier système. Un ensemble de codes orthogonaux est disposé dans une matrice de sous-ensembles de codes orthogonaux et de codes orthogonaux inversés, chaque sous-ensemble comprenant 2n rangées et 2n colonnes ; et attribuer des codes orthogonaux correspondant aux numéros des codes orthogonaux de l'ensemble associé au moins aux rangées restantes du second système.

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