Title :
Multilevel coding: aspects from information theory
Author :
Fischer, Robert F H ; Huber, Johannes B. ; Wachsmann, Udo
Author_Institution :
Lehrstuhl fur Nachrichtentech., Erlangen-Nurnberg Univ., Germany
Abstract :
Important issues for coded modulation in practice are derived from information theoretic parameters. Optimality of multilevel coding as well as various rules to assign rates to the individual component codes are discussed. Moreover, suitable dimensionality of the signal constellation used for coding is considered. All phenomena predicted from information theory are confirmed by simulation results. Finally, optimum combination of coding and signal shaping is derived. Noticeable shaping gains are only achievable if presented rules are taken into account
Keywords :
amplitude shift keying; block codes; channel capacity; convolutional codes; information theory; modulation coding; quadrature amplitude modulation; ASK; QAM; block codes; coded modulation; convolutional codes; equivalent channels; individual component codes; information theory; multilevel coding; optimality; random coding; rate assignment; signal constellation dimensionality; signal shaping; simulation results; Block codes; Constellation diagram; Convolutional codes; Decoding; Information theory; Modulation coding; Multidimensional systems; Predictive models; Signal mapping; World Wide Web;
Conference_Titel :
Global Telecommunications Conference, 1996. GLOBECOM '96. 'Communications: The Key to Global Prosperity
Conference_Location :
London
Print_ISBN :
0-7803-3336-5
DOI :
10.1109/GLOCOM.1996.586754
