What is CIR (Carrier to Interference Ratio)?

CIR is the proportion of carrier signal to the Interference expressed. The carrier is the ideal signal, and the interference is the adjacent and co-channel interference.
Measuring the total CIR degradation by a nonlinear gadget utilizing a kernel function obtained from swept power two-tone intermodulation distortion measurements, the CIR of a nonlinear device might be resolved for any discretionary input signal.