The HS-PDSCH is used to carry the HS-DSCH (High Speed – Downlink Shared Channel)transport channel. Each HS-PDSCH corresponds to one channelization code of fixed spreading factor SF=16. It is also possible for a UE to be assigned multiple channelization codes in the same HS-PDSCH sub-frame, depending on its capability. The HS-PDSCH may use QPSK or 16QAM modulation.
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