INSERTING AND EXTRACTING CONTROL DATA REPLACING CYCLIC PREFIX SAMPLES

摘要

In a communication line between access nodes, like the CPRI between BBU and RRH for instance, the standard LTE signal conveyed can be punctured to transmit additional non-standard LTE control data between the two nodes. At the receiving node, the signal is demultiplexed: control data are extracted and the LTE signal is reconstructed. Here it is proposed to replace the Cyclic Prefix (which is of no use for the cable transmission between BBU and RRH since there is almost no delay spread on the transmission line) by control data. The control data signal consists in an auxiliary OFDM signal with a power of two IFFT, ie number of samples replacing the Cyclic Prefix.