Constellation Shaping, Nonlinear Precoding, and Trellis Coding for Voiceband Telephone Channel Modems »

Tretter (U. of Maryland) presents a history of the developments in signal constellation design, nonlinear pre-equalization, and trellis coding made by ITU-T Study Group XVII during its meetings to create a recommendation for a state-of-the-art voice band telephone channel modem. Topics addressed include signal constellation shaping by shell mapping, nonlinear precoding, four-dimensional trellis codes, and fast equalizer training by using periodic sequences and FFT methods. Several approaches that were considered by not accepted are also presented. A good reference for those working in the broad fields of communication theory, information theory, and modem design; also suitable as a text for an advanced graduate level course in modulation and coding. Annotation (c)2003 Book News, Inc., Portland, OR