BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to digital transmission systems and, more particularly, to a digital transmission system having a clipping and quantum effect eliminating method.

摘要

And a transmission and reception path in which the transmission system is connected to the bi-directional transmission path 18 via the hybrid circuit 16. [ The transmission path includes a DAC 14 having a given area and precision, and the transmission path signal is limited and terminated for the area and precision prior to the DAC. An echo canceller 26 may be coupled between the transmit path and the receive path and is used to generate an estimated echo response in which the difference of the transmit path signal before and after the limit and termination is subtracted from the receive path signal, All inputs may come from the transmit path following the limit and termination. The amplitude of the transmitted signal samples can be shaped by constraints. If the system uses multiple carriers, the amplitude may be scaled to reduce clipping and send the scaling value to the far destination.