The Dedicated Physical Data Channel is a sort of uplink dedicated physical channel. It is an I/Q code, multiplexed inside every radio frame. The uplink DPDCH is utilized to convey the Dedicated Channel transport channel. There can be more than one DPDCH exist over a radio link. The spreading factor varies between 256 to 4. Consequently the bits per radio frame fluctuate from 150 bits to 9600 bits individually.