根据协议描述，RSRP是测量带宽内，所有承载小区专用导频子载波的功率平均值：Reference signal received power(RSRP), is defined as the linear average over the power contributions (in [W])of the resource elements that carry cell-specific reference signals within theconsidered measurement frequency bandwidth.
如果按照协议字面理解，UE只测量导频RE上的功率，并没有对目标小区导频做滤波，这样理解显然是错的，因为不滤波就无法区分服务小区和邻区RSRP，特别是在PCI mod 3对齐场景下。