Section: 6.10.1.2 Mapping to resource elements
Content: The reference signal sequence shall be mapped to complex-valued modulation symbols used as reference symbols for antenna port in slot according to where The variables and define the position in the frequency domain for the different reference signals where is given by The cell-specific frequency shift is given by . Resource elements used for transmission of cell-specific reference signals on any of the antenna ports in a slot shall not be used for any transmission on any other antenna port in the same slot and set to zero. In an MBSFN subframe, cell-specific reference signals shall only be transmitted in the non-MBSFN region of the MBSFN subframe. Figures 6.10.1.2-1 and 6.10.1.2-2 illustrate the resource elements used for reference signal transmission according to the above definition. The notation is used to denote a resource element used for reference signal transmission on antenna port. Figure 6.10.1.2-1. Mapping of downlink reference signals (normal cyclic prefix) Figure 6.10.1.2-2. Mapping of downlink reference signals (extended cyclic prefix)