Title :
Optimal discrete bit loading for DMT based constrained multicarrier systems
Author :
Fasano, A. ; Di Blasio, G. ; Baccarelli, E. ; Biagi, M.
Author_Institution :
Dept. Inf. Comput., Univ. di Roma, Italy
Abstract :
We present the solution for the optimal discrete bit loading in multicarrier systems employing discrete multitone (DMT) modulation, when additional constraints on either the maximum allowable energy for each subchannel or the maximal cardinality of the QAM constellations to be used are given. Conditions for the optimality of greedy algorithms in this context are also provided. The solution is based on some results in matroid theory about combinatorial optimization.
Keywords :
combinatorial mathematics; optimisation; quadrature amplitude modulation; DMT based constrained multicarrier systems; QAM constellations; combinatorial optimization; discrete multitone modulation; greedy algorithms; margin maximization; matroid theory; maximal cardinality; maximum allowable energy; modulation/coding; optimal discrete bit loading; rate maximization; subchannel; Algorithm design and analysis; DSL; Digital modulation; Greedy algorithms; OFDM modulation; Quadrature amplitude modulation;
Conference_Titel :
Information Theory, 2002. Proceedings. 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7501-7
DOI :
10.1109/ISIT.2002.1023515
