RSRP / RSRQ / RSSI Converter
Convert between LTE signal measurements and assess signal quality per 3GPP TS 36.214.
Formula: RSRQ (dB) = 10·log₁₀(N_RB) + RSRP − RSSI · per 3GPP TS 36.214
RSRQ Formula (3GPP TS 36.214)
RSRQ (Reference Signal Received Quality) relates to RSRP and RSSI through the number of resource blocks in the measurement bandwidth (NRB):
RSRQ (dB) = 10·log₁₀(NRB) + RSRP (dBm) − RSSI (dBm)
RSSI (dBm) = 10·log₁₀(NRB) + RSRP (dBm) − RSRQ (dB)
RSRP (dBm) = RSSI (dBm) + RSRQ (dB) − 10·log₁₀(NRB)
NRB is the number of resource blocks across the measured bandwidth. For a 20 MHz LTE carrier NRB = 100. RSSI is the total received power across all NRB including interference and noise.
Frequently Asked Questions
What is RSRP?▾
RSRP (Reference Signal Received Power) is the average power of the LTE reference signals (CRS) received by the UE, measured in dBm. It is the primary metric for cell selection and handover decisions. Typical values range from −44 dBm (excellent) to −140 dBm (no signal).
What is RSRQ?▾
RSRQ (Reference Signal Received Quality) captures signal quality by factoring in interference and noise. It is measured in dB and typical values range from −3 dB (excellent) to −20 dB (poor). Unlike RSRP, RSRQ accounts for load: a heavily loaded cell degrades RSRQ even if RSRP is strong.
What is RSSI?▾
RSSI (Received Signal Strength Indicator) is the total wideband power measured in the LTE bandwidth, including the desired signal, interference from neighbouring cells, and thermal noise. RSSI alone cannot distinguish between a strong wanted signal and high interference.
What is a good RSRP for LTE?▾
RSRP ≥ −80 dBm is considered excellent, −80 to −90 dBm is good, −90 to −100 dBm is fair, and below −110 dBm is poor. Values below −120 dBm typically result in marginal or no service. The thresholds can vary slightly by operator and device.