Apparatus and method for allocating ovsf codes and i/q...

Details Apparatus and method for allocating ovsf codes and i/q... Apparatus and method for allocating ovsf codes and i/q...

H - Electricity

04

B

H04B 7/26 (2006.01)

Patent

CA 2552234

The present invention supposes a situation in which an Enhanced Uplink Dedicated transport Channel (EUDCH) is used in a Wideband Code Division Multiple Access (WCDMA) system. In a user equipment (UE), when physical channels for transmitting EUDCH data are transmitted in addition to existing physical channels, a Peak-to-Average Power Ratio (PAPR) of an uplink transport signal increases. The increase in PAPR depends upon Orthogonal Variable Spreading Factor (OVSF) codes allocated to the corresponding physical channels and in-phase/quadrature-phase (I/Q) channels. Therefore, the present invention proposes an apparatus and method for allocating optimum OVSF codes and I/Q channels to EUDCH-related physical channels in order to minimize an increase in PAPR due to EUDCH.

La présente invention part d'une situation dans laquelle un canal de transport dédié de liaison montante amélioré (EUDCH) est utilisé dans un système d'accès multiple à large bande par partage de code (WCDMA). Dans un matériel utilisateur (UE), lorsque des canaux physiques de transmission de données EUDCH sont transmis en plus des canaux physiques existants, un rapport de puissance crête/moyenne (PAPR) d'un signal de transport de liaison montante augmente. L'augmentation dans PAPR dépend des codes de facteur d'étalement orthogonal variable (OVSF) affectés aux canaux physiques correspondants et aux canaux en phase/en phase en quadrature (I/Q). Par conséquent, la présente invention propose un appareil et un procédé d'affectation de codes OVSF optimaux et de canaux I/Q à des canaux physiques liés à EUDCH afin de réduire au minimum une augmentation dans PAPR du fait de EUDCH.

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