Broadcast transmission system with correction for distortion caused by amplifying and signal conditioning components at a different rate

The present invention relates to broadcast transmission systems and is particularly directed to compensation of distortion within a digital transmission system, such as a digital TV ("DTV") transmission system. A transmission system () broadcasts a signal. Within the system (), a power amplifier () causes non-linear distortion. A pre-amp component, such as a band-pass filter (), causes linear distortion. A high power filter () is located downstream of the power amplifier () and causes linear distortion. A linear equalizer () compensates for the distortion caused by the high power filter (). A non-linear corrector () compensates for the distortion caused by the power amplifier (), and is located downstream of the linear equalizer (). A linear equalizer () compensates for the distortion caused by the pre-amp components (e.g., ). The compensating components () are located upstream of the distorting, pre-amp component (e.g., ). A interpolation component () is located between the three compensating components () and the distortion causing components (, and ) to increase a rate of the signal, such that the compensation occurs at a lower rate of the signal. Signal sampling points () are located downstream of each distorting component (, and ). Sampling selectively occurs at one of the sample points () for use to update compensation.