Apparatus and Method for allocating OVSF codes and I/Q channels for reducing peak-to-average power ratio in transmitting data via enhanced up-link dedicated channels in WCDMA systems

摘要

The present invention assumes a situation in which an enhanced uplink dedicated transport channel (hereinafter referred to as 'EUDCH') is used in a wideband code division multiple access (WCDMA) system. do.;Increase of Peak-to-Average Power Ratio (hereinafter referred to as 'PAPR') of uplink transmission signal when physical channels for EUDCH data transmission are additionally transmitted in addition to existing physical channels in the user terminal Is induced. The increase in PAPR depends on the Orthogonal Variable Spreading Factor (OVSF) code and the in-phase / quadrature-phase (I / Q) channel applied to the corresponding physical channels.;Accordingly, the present invention proposes an apparatus and method for allocating an optimal OVSF code and I / Q channel to EUDCH-related physical channels in order to minimize the increase of PAPR due to EUDCH.;WCDMA, EUDCH, Orthogonal Variable Spread Index (OVSF) code, Maximum Power to Average Power Ratio (PAPR)