公开(公告)号：EP0672321A1

公开(公告)日：1995-09-20

申请号：EP94921369.0

申请日：1994-06-24

申请人： CODEX, INC., a subsidiary company of MOTOROLA INC.

发明人： EYUBOGLU, M., Vedat

IPC分类号： H03M5 ,  H03M13 ,  H04L25 ,  H04L27

CPC分类号： H04L25/4975 ,  H04L25/03343 ,  H04L25/497 ,  H04L27/3411

摘要： An improved precoding technique (700) and device (100) allows transmission of a signal point sequence over a channel h(D) to provide efficient data transfer in the presence of intersymbol interference and noise at data rates approaching channel capacity. This improved technique works with trelliscoded modulation and with any signal constellation (502). Thus the present invention simplifies shaping and allows signaling at fractional rates without constellation switching. A key advantage of the present invention over prior art is its ability to achieve reduced dither loss by selecting the output components of a mapper based on past components of a channel output sequence.