Analysis of RSRP Measurement Accuracy

In this letter, the accuracy of the reference signal received power (RSRP) measurement carried out by an LTE user equipment (UE) is analyzed. Assuming the measurement based on the averaged frequency-domain maximum likelihood estimate (FD-MLE), the closed-form expressions of the mean-error and mean-squared-error (MSE) are obtained to show the impact of the channel parameters, the cell ID, the subset size, and the signal-to-interference-plus-noise ratio (SINR). The numerical calculation results based on the closed-form expressions show that the optimum subset size tends to decrease with the SINR and delay spread.