Section: 6.10.3 UE-specific reference signals associated with PDSCH
Content: UE-specific reference signals associated with PDSCH - are transmitted on antenna port(s) , , , ,, , , or on the antenna ports indicated in Table 6.3.4.4-1, where is the number of layers used for transmission of the PDSCH; - are present and are a valid reference for PDSCH demodulation only if the PDSCH transmission is associated with the corresponding antenna port according to clause 7.1 of TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4]; - are transmitted only on the physical resource blocks upon which the corresponding PDSCH is mapped. A UE-specific reference signal associated with PDSCH is not transmitted in resource elements in which one of the physical channels or physical signals other than the UE-specific reference signals defined in 6.1 are transmitted using resource elements with the same index pair regardless of their antenna port . A UE-specific reference signal associated with subslot-PDSCH or slot-PDSCH is only transmitted in physical resource blocks in frequency domain assigned for PDSCH transmission where - the assignment maps to both physical resource blocks of a given PRG (see clause 6.4.2); - in case of subslot-PDSCH, the associated SPDCCH is not mapped to resource elements of a given PRG assigned for PDSCH transmission (see clause 6.4.2).. For frame structure type 3, for PDSCH in a subframe with the same duration as the DwPTS duration of a special subframe configuration, the UE-specific reference signals are defined the same as that for the corresponding special subframe configuration.