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

This book is an excellent reference for those working in the broad fields of communication theory, information theory, and modem design. It is essential for researchers in modulation and coding for voiceband telephone line modems; signal constellation design; nonlinear precoding for modems; and trellis coding.
The author presents the theory behind the new modulation and coding techniques included in ITU-T Recommendation V.34. Topics discussed include signal constellation shaping by shell mapping, nonlinear precoding, four-dimensional trellis codes, and fast equalizer training by using periodic sequences and FFT methods. In addition, several approaches that were considered but not accepted are presented including trellis shaping, trellis precoding, and modulus conversion.

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