Code search for MQAM TCM on independent 2-D fading channels

Author

Cardinal, Christian ; Gagnon, Francois

Author_Institution

Dept. of Electr. Eng., Ecole de Technol. Superieure, Montreal, Que.

fYear

1994

fDate

27 Jun-1 Jul 1994

Firstpage

447

Abstract

Cut-off rate analysis of independent Rayleigh fading channels on each coordinates shows that the use of 64 signals are near optimal at 3 bits/signal for regular 2-D MQAM constellations. A method for the search of optimal MQAM TCM codes at a code rate equal to 3/6 is presented. An appropriate mapping is first constructed. In the second step we use a fast algorithm to find the optimal codes. This algorithm consists in computing the minimum distance between all coded signal sequences. Finally, the code search is completed by simulations

Keywords

channel capacity; fading; quadrature amplitude modulation; search problems; sequences; trellis coded modulation; trellis codes; 2-D MQAM constellations; MQAM TCM codes; code rate; code search; coded signal sequences; cut-off rate analysis; fast algorithm; independent 2-D fading channels; mapping; minimum distance; optimal codes; simulations; Bit error rate; Computational modeling; Constellation diagram; Convolution; Convolutional codes; Fading; Feedback; Partitioning algorithms; Quadrature amplitude modulation; Signal analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory, 1994. Proceedings., 1994 IEEE International Symposium on

Conference_Location

Trondheim

Print_ISBN

0-7803-2015-8

Type

conf

DOI

10.1109/ISIT.1994.395062

Filename

395062