6. Transmission chain
In this chapter, we present the transmission chain, i.e. all the operations performed on a block of data, without going into the protocol mechanisms used to manage this transmission.
A block of data at the input is called a transport block. We apply an error detection code, a turbo correction code and decide on a particular modulation (figure 22 ).
6.1 Conveyor channels
Depending on the quality of the radio link, the base station decides on a transport format, i.e. the type of modulation (QPSK, 16-QAM or 64-QAM ) and the coding rate. The radio resource control process decides on the number of RBs to allocate for the stream in question,...
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Transmission chain
MAC layer and HARQ protocol
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