Multidimensional trellis-coded communication system

摘要: A trellis-coded modulation system is provided in which the output of trellis encoder used to select a subset multidimensional QAM constellation. The selection process performed such that a) minimum square Euclidean distance between valid sequences successive selected subsets maximized, b) resulting code rotationally invariant, and c) corresponding transition from present state i different next j corresponds i.