Method and apparatus for generating preamble sequence for...

H - Electricity – 04 – J

Patent

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H04J 11/00 (2006.01)

Patent

CA 2559814

Disclosed is a method and an apparatus for generating a preamble sequence for an adaptive antenna system supporting a space division multiple access in an OFDMA communication system. Particularly, disclosed is a method for forming a preamble sequence identifying each of a plurality of mobile subscriber stations located within a cell or a sector of a communication system which includes a plurality of sub-channels assigned to the mobile subscriber stations, each of the sub-channels including a plurality of bins each of which includes n number of contiguous subcarriers in a frequency domain, the preamble sequence being transmitted before each of the sub-channels is transmitted, the method including the step of generating a preamble sequence by phase-shifting a predetermined sequence according to a predetermined phase shift sequence in the frequency domain.

Cette invention concerne un procédé et un appareil permettant de générer une séquence préambule pour un système d'antenne adaptative supportant un accès multiple par répartition spatiale dans un système de communication OFDMA. Cette invention concerne plus particulièrement un procédé permettant de former une séquence de préambule identifiant chacune d'une pluralité de stations d'abonnés mobiles se trouvant au sein d'une cellule ou d'un secteur d'un système de communication qui comprend une pluralité de sous-canaux attribués aux stations d'abonnés mobiles, chacun de ces sous-canaux comprenant une pluralité de fichiers comprenant chacun un nombre n de sous-porteuses contiguës dans un domaine de fréquences, la séquence de préambule étant transmise avant la transmission de chacun des sous-canaux. Le procédé de cette invention consiste à générer une séquence de préambule par déphasage d'une séquence prédéterminée conformément à une séquence de déphasage prédéterminée dans le domaine de fréquences.

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