Title :
Multilevel coded modulations based on asymmetric constellations
Author :
Sawaya, Hadi E. ; Boutros, Joseph J.
Author_Institution :
ESIB, St. Joseph Univ., Beirut, Lebanon
Abstract :
This paper deals with multilevel coded modulations (MLC) based on ASK and PSK constellations for the AWGN channel. Under multistage decoding (MSD) and when block partitioning is applied to an asymmetric constellation, we show that the capacity of the modulation can be attained using constituent codes with equal signalling rates at each level. For finite code length N, performance is derived analytically by evaluating Gallager´s coding exponent
Keywords :
AWGN channels; amplitude shift keying; decoding; modulation coding; phase shift keying; ASK constellations; AWGN channel; Gallager´s coding exponent; PSK constellations; asymmetric constellations; block partitioning; constituent codes; equal signalling rates; finite code length; multilevel coded modulation; multistage decoding; AWGN channels; Added delay; Amplitude shift keying; Constellation diagram; Decoding; Degradation; Modulation coding; Phase shift keying; Protection; Signal to noise ratio;
Conference_Titel :
Information Theory, 2001. Proceedings. 2001 IEEE International Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-7123-2
DOI :
10.1109/ISIT.2001.936144
