公开(公告)号：CH609510A5

公开(公告)日：1979-02-28

申请号：CH780076

申请日：1976-06-18

Applicant: IBM

Inventor： CSAJKA ISTVAN ,  UNGERBOECK GOTTFRIED DR

IPC: H04L27/38 ,  H04L27/00 ,  H04L27/18 ,  H04L27/20 ,  H04B1/66 ,  H03K13/00

Abstract: A method and structure for converting a sequence of binary digits into a sequence of discrete signal values, e.g., phase values, of a modulated carrier signal for data transmission. By introducing additional redundant signal values and coding information in a state-dependent sequential manner, enlarged minimum Euclidian distance between possible signal value sequences is achieved which results in a reduced error probability when maximum-likelihood decoding is applied in the receiver.