Trellis coded schemes for ISDN transmission

Abstract

The application of trellis-coded techniques to integrated services digital network (ISDN) systems is discussed. Under the assumption that the channel can be equalized, a maximum-likelihood detector is derived for a near-end (NEXT) limited, digital subscriber loop. The proposed detector is based on the highly colored spectral characteristics of the NEXT interference. Two trellis-coded schemes are investigated in conjunction with the detector, and issues such as overall complexity versus expected performance are discussed in detail.<>