   # What does the range of Reference Signal Received Power (RSRP) in LTE and How it is calculated ?

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What are all factors are considered while calculating the range of RSRP ? posted Sep 5, 2015
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## 1 Answer

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RSRP : Linear average of power transmitted over REs which carries cell specific reference signal over a considered bandwidth.
While calculating RSRP value, power transmitted on cyclic prefix is excluded.

RSRP is mainly used for cell selection, cell re-selection, handover and to calculate path loss for the power control.
RSRP value ranges from -140 dbm to -44 dbm. These both border values come out by using the following steps.

Steps to calculate Max value i.e. -44 dbm:

1. Maximum level that an UE can receive : -25 dbm
2. Bandwidth of 1.4 Mhz = 6 RB = 72 REs
-25 - 10 log (72) = -44 dbm

Steps to calculate Minimum value i.e. - 140 dbm:
1. Maximum path loss of 152 db
2. Transmit power of 43 dbm
3. Bandwidth of 20 Mhz = 1200 REs
43 - 152 - 10 log (1200) = -139.72

Reference: answer Sep 6, 2015
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