Power Settings in LTE

Power Settings in LTE PA/PB Concept

Reference Signal Power: Indicates the cell reference signal power of each physical antenna. However, the cell reference signal power delivered in SIB2 is that of each logical antenna. PA/PB downlink signal is made up of many different components. , Reference Signal, PDCCH, PDSCH Reference Signal comparing to other channels certain degree of offset, P_A between Reference Signal and other channel power and and it is because the reference channels occurs only in specific symbols, not in every symbols. if you measure the power of each symbol, some symbol (symbol with reference signal) has higher power than the other symbols (symbol without reference signal)  To solve this problem of power difference between two groups of symbols, we can put lesser power to the non-reference signal channels at the symbol carrying reference signal. Due to this, you see another type of offset P_B in the plot

Power Settings in LTE