signal to interference plus noise ratio (SINR)
The Third Generation Partnership Project(3GPP) has specified several parameters for the evaluation of radio channels of mobile networks such as Long Term Evolution( LTE), which are used to regulate dial-up to the eNodeB, i.e. the base station of LTE networks, and handover, and to measure quality.
Reference Signal Receive Power( RSRP) is one such parameter for reference signal receive field strength, Reference Signal Receive Quality( RSRQ) is another for quality assessment, Received Signal Strength Indicator( RSSI) for receive field strength indication, and Signal to Interference plus Noise Ratio (SINR) for signal quality.
The SINR value is a parameter for the signal quality present at the mobile station, which also includes the interference and noise. For this parameter, the useful signal (P) is set in relation to the sum of interference (I) and noise figure( NF): SINR =P/I+NF. The SINR value is dimensionless and is given in decibels. The higher the level of the useful signal, the better the SINR value. If the ratio is 10:1, i.e. 10 dB and greater, then it is an excellent signal quality, between 5 dB and 10 dB it is good and below 5 dB it is only conditionally usable.