The Mean-Square Error of SSBAM Class 4 Partial Response Data Signals Distorted by Parabolic Group Delay

An expression is derived for the mean-square error of an SSBAM multilevel class 4 partial response data signal when distorted by a channel with parabolic group delay with the minimum value centered in the signal spectrum. The optimum carrier phase and sampling times are also determined. Numerically evaluated results indicate that the approximation errors made in the derivation are not significant in the regions of practical interest.