Whether reference signal power should be adjusted while carrier spectrum expands from 10 MHz to 20 MHz?
RS power should be increased to keep the same footprint.
But HW should support the power increase.
Total Tx power should be increased as well.
Yes, you need to adjust… for example, if your RS power was 18.2 in 10MHz network, it will be15.2 in 20MHz network… provided that Pa and Pb is constant.
But to keep the same RS power, you will need to change Pa,Pb or need to use higher power RRU