公开(公告)号：JP2001177447A

公开(公告)日：2001-06-29

申请号：JP2000289844

申请日：2000-09-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PAUL DAVID HENDRICKS ,  DONALD RAYMOND RATORERU ,  RENE A SMITH ,  STEVEN BROOKE WITTMER

IPC: H04L25/03 ,  H04B3/04 ,  H04M1/68 ,  H04M11/00

Abstract: PROBLEM TO BE SOLVED: To provide a configuration/method by which the dynamic range of a transmitted signal can be made flat so as to minimize return loss. SOLUTION: The above task can be solved by providing a digital pre- distorted filter in a data access device DAA in a MODEM chip set. Placing the pre-distorted filter at the outside of the DAA attains digital processing such as digital emulation of the impedance of a central station, thereby avoiding the effect by giving pre-distortion to a transmission signal. In the case of a digital emulation filter, placing the pre-distorted filter to the outside of an (A/D) loop/(D/A) loop can minimize noise.