However, they are not absolute, as cellular communications quality is also affected by other external factors – base station utilisation, operator equipment bandwidth, etc. These metrics help you determine the best location for your outdoor antenna and provide an overall assessment of your RF environment.When evaluating link quality using RSSI, SINR, RSRP and RSRQ values, you should consider the following factors: In this case, it is impossible to find out the numerical indicators, since the scale is formed based on internal algorithms and calculations of the device software. In the worst case, a mobile device may not be able to display numerical values for signal strength and quality at all. It often happens that your modem model displays only a part of the values or one specific value in the web interface. Unfortunately, not all cellular devices are able to show all the listed values. It is important to know what these abbreviations mean in order to properly adjust the outdoor antenna of a modem, 4G router or repeater and get a stable and fast cellular connection. Various values such as RSSI, SINR, RSRP, and RSRQ are used to determine the strength and quality of a cellular signal. What is RSSI, SINR, RSRP, RSRQ? How does this affect signal quality? What is RSSI, SINR, RSRP, RSRQ? How does this affect signal quality?.UE Measured RSRP equals to: Power from antenna – Path Loss = 25.2 – 128 = -102. Let’s imagine Path Loss as 128dB in the UE location, then: Power from antenna: Power + Antenna Gain – Feeder Loss = 12.2 + 16 – 3 = 25.2dBm So based on calculation, transmission power for each Resource Element is 12.2dBm Number of subcarriers: 1200 (there are 1200 subcarriers in 20 MHz) In this example we will see theoretical calculation of RSRP: UE measures all the reference signals which are carried by resource elements and makes an average of measurements to obtain an RSRP value. It is equivalent of CPICH Power in WCDMA. RSRP is used for cell selection, cell reselection and handover purposes in LTE. The Reference Signal is carried by Resource Elements (RE). Reference Signal Received Power or with abbreviated version RSRP is linear averaged signal strength of Reference Signal.

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