Mean square error of s.s.b.a.m. class 4 partial response data signals due to slope, sag and ripple group delay components

An expression is derived for the minimum mean square error of an s.s.b.a.m. data signal using class 4 partial response coding when distorted by a channel with group delay slope. This result supplements previously published results which describe the effects of group delay sag and ripple. It is shown that the total minimum mean square error from a combination of all three group delay components can be determined by adding the distortion from each component independently.