Title :
Trellis Coded Modulation with partially overlapped signal subsets
Author :
Tran, Van Khan ; Dinh, Cuong ; Hashimoto, Takeshi
Author_Institution :
Dept. of Radio-Electron. Eng., Le Qui Don Tech. Univ., Hanoi
Abstract :
We present a simple yet effective scheme of trellis coded modulation (TCM) codes using partially overlapped signal subsets as a shaping technique. The optimum enlargement of the QAM signal constellation is reported. We show that 2-state TCM with 4 partially overlapped signal subsets has a coding gain of 2.5 dB in comparison with uncoded transmission, which is about 0.5 dB higher than the Ungerboeck TCM code with the same number of states. The construction is then extended to any number of trellis states using 4-, 8-, 16-way partitions of the QAM constellation.
Keywords :
trellis coded modulation; QAM signal constellation; Ungerboeck TCM code; gain 2.5 dB; overlapped signal subsets; trellis coded modulation; AWGN; Communications technology; Constellation diagram; Gain; Lattices; Modulation coding; Peak to average power ratio; Quadrature amplitude modulation; Signal design; Signal mapping; TCM codes; overlapping; shaping the constellation;
Conference_Titel :
Advanced Technologies for Communications, 2008. ATC 2008. International Conference on
Conference_Location :
Hanoi
Print_ISBN :
978-1-4244-2680-5
Electronic_ISBN :
978-1-4244-2681-2
DOI :
10.1109/ATC.2008.4760549
