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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

  • US 7,903,618 B2
  • Filed: 05/11/2009
  • Issued: 03/08/2011
  • Est. Priority Date: 02/14/2004
  • Status: Active Grant
First Claim
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1. A method for transmitting enhanced packet data in a mobile communication system, the method comprising the steps of:

  • generating a dedicated physical control channel (DPCCH) using an Orthogonal Variable Spreading Factor (OVSF) code (256,0) and a quadrature-phase (Q) channel;

    generating a dedicated physical data channel (DPDCH) using an OVSF code (SFDPDCH, SFDPDCH/4) and an in-phase (I) channel, where SFDPDCH denotes a spreading factor of the DPDCH;

    generating an E-DPCCH using an OVSF code (SFE-DPCCH,

         1) and the I channel, where SFE-DPDCH denotes a spreading factor of an OVSF code to be allocated to a dedicated control channel (E-DPCCH) for supporting transmission of enhanced uplink packet data; and

    generating an E-DPDCH using an OVSF code (SFE-DPDCH, SFE-DPDCH/2) and the Q channel, where SFE-DPDCH denotes a spreading factor of an OVSF code to be allocated to a dedicated data channel (E-DPDCH) for supporting transmission of the enhanced uplink packet data.

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