Let’s assume that all RE powers are same like Rx Power (RSRP). Power in each subcarrier: 20000mW / 1200 = 16.66mW (milliWatt)īased on calculation, transmission power for each Resource Element is 16.66mW. 100 PRB and 1200 subcarriers are exist in 20Mhz). N: number of PRB in certain bandwidth (e.g. RSRP (Rx) = Reference Signal Received Power: average received power of reference signal which is carried on Resource Element (RE). RSSI = Received Signal Strength Indication: total received power in the certain bandwidth including traffic channel power, control channel power, thermal noise and etc… In this example we will see theoretical calculation of RSRQ: Regarding to the negative value of RSRQ, then let’s have a look following basic calculation: RSRQ value might be used for some scenarios such as cell selection, cell reselection and handover. But, how do we see the RSRQ value as negative in drive-test tools and why do we need RSRQ ? Here the “received signal” is reference signal (RSRP). Quality parameters rsrq (Reference signal received quality) and rsrp (Reference signal received power) are determined.Reference Signal Received Quality or with abbreviated version RSRQ is quality of the received signal. command 'AT!="showphy"' returns following statistics: DL SYNCHRO STATISTICSĬhannel estimation state (Cell-spec.) : HIGH CINRĬhannel estimation state (UE-spec.) : LOW CINRĬhannel estimation state (MBSFN) : LOW CINRĬommand 'AT+CESQ' reurns "not known or not detectable" for rxlev (Received signal strength level), ber (Channel bit error rate), rscp (Received signal code power) and ecno (Ratio of the received energy per PN chip to the total received power spectral density). Which LTE radio parameters are most relevant and how to interpret them?Į.g. We would like to implement LTE signal quality reporting in our products.
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