Figure 19: Transmitter function code for LTE/LTE A
Firstly, we create an empty downlink resource grid(enb) to put our estimated data symbols in there and then we create indices in that sub frame(ltecellRSIndices(enb)), where the cell specific reference belongs. Then we compute the symbol values and in the sub frame we can insert the indices at the symbol values.
At the user data, first(PDSCH) we do the channel coding or the triple coding at the rate of two third and then we perform the PDSCH operations for the symbols and we place the symbols at the place of PDSCH indices, the values that we just created. Finally, at the lteOFDModulate we generate a transmit waveform.
Channel function code for LTE/LTE A:
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