SNR Performances for Cascaded Hard Limiting Repeater System

A conventional coaxial CATV system consists of a cascade of many linear or / and nonlinear repeaters ( or amplifiers ) . The output signal-to-noise power ratio ( SNR ) performance in a cascaded linear amplifier system is evaluated by the well-known noise figure . On the other hand, the output SNR performance in nonlinear systems is generally complicated due to the nonlinear behavior of signal and noise , and particularly for cascaded nonlinear repeater systems there has been no analysis of the total output SNR . Therefore , it is of interest to investigate the relations between the output SNR at the final stage and the input SNR at the first stage in cascaded nonlinear repeater systems