Multilevel trellis coded 16QAM with partially overlapped signalsets

摘要

Multilevel trellis coded 16QAM with partially overlapped signalsets is introduced. It is shown with this scheme that one can achieve anasymptotic coding gain of 4.26 dB over QPSK with a bandwidth efficiencyof 2.5 bit/sec/Hz. This result is due to the fact that multileveltrellis coding technique is more appropriate for utilizing the increasedEuclidean distance of partially overlapped signal sets than itscounterpart, TCM scheme. We explain this coding scheme in terms ofperformance, complexity, and set partitioning of partially overlapped16QAM signals, and compare it with trellis coded 8PSK, 16QAM