Title :
A comparison analysis of two multilevel QAM systems
Author :
Engdahl, Karin ; Zigangirov, Kamil Sh
Author_Institution :
Dept. of Inf. Technol., Lund Univ., Sweden
Abstract :
Two multilevel modulation systems are compared in terms of capacity, under the condition that the average energy per channel use is the same for the two systems. We consider the suboptimal multistage receiver for the Gaussian channel. We conclude that, under these conditions, the capacity for the hexagonal system is close to 1 dB better than the capacity for the rectangular system
Keywords :
Gaussian channels; quadrature amplitude modulation; receivers; Gaussian channel; average energy per channel use; capacity; hexagonal system; multilevel QAM systems; multilevel modulation systems; rectangular system; suboptimal multistage receiver; Constellation diagram; Decoding; Error probability; Euclidean distance; Gaussian channels; Information technology; Lattices; Modulation coding; Quadrature amplitude modulation; Upper bound;
Conference_Titel :
Information Theory, 1998. Proceedings. 1998 IEEE International Symposium on
Conference_Location :
Cambridge, MA
Print_ISBN :
0-7803-5000-6
DOI :
10.1109/ISIT.1998.708810
