Changes

For 4G service mode, there are four relevant measurements:

For 4G service mode, there are four relevant measurements:

*RSSI - Received Signal Strength Indicator

*[[RSSI]] - Received Signal Strength Indicator

*RSRP - the Reference Signal Received Power is the power of the LTE Reference Signals spread over the full bandwidth and narrowband

*[[RSRP]] - the Reference Signal Received Power is the power of the LTE Reference Signals spread over the full bandwidth and narrowband

*RSRQ - Reference Signal Received Quality is a C/I type of measurement and it indicates the quality of the received reference signal (similar to EC/IO)

*[[RSRQ]] - Reference Signal Received Quality is a C/I type of measurement and it indicates the quality of the received reference signal (similar to EC/IO)

*SINR - Signal to Interference plus Noise Ratio (A minimum of -20 dB SINR is needed to detect RSRP/RSRQ). Indicates the throughput capacity of the channel. As the name implies, SINR is the strength of the signal divided by

*[[SINR]] - Signal to Interference plus Noise Ratio (A minimum of -20 dB SINR is needed to detect RSRP/RSRQ). Indicates the throughput capacity of the channel. As the name implies, SINR is the strength of the signal divided by

the strength of any interference

the strength of any interference

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RSSI for LTE is a calculated from several other signal related measurements: '''RSSI = wideband power = noise + serving cell power + interference power'''. For example, a 4G LTE modem might report an RSSI of -68 dBm, but:

'''[[RSSI]]''' for LTE is a calculated from several other signal related measurements: '''RSSI = wideband power = noise + serving cell power + interference power'''. For example, a 4G LTE modem might report an RSSI of -68 dBm, but:

'''RSRP = -102 dBm'''

'''RSRP = -102 dBm'''