ANALYSIS AND IMPLEMENTATION OF AN ADJUSTABLE-RATE MULTILEVEL CODED MODULATION SYSTEM

The authors describe the design of a multilevel coded modulation syste m. The main goal is to achieve a high degree of rate flexibility, with the same hardware allowing for the implementation of several coded sc hemes. This is obtained by associating a hierarchy of punctured convol utional codes with the partition chain of a square-lattice signal cons tellation. After discussing the rationale behind their design choices and implementation details, the authors analyse the system by computin g its error probabilities, and show experimental results.