Title :
Ring-TCM codes for QAM
Author :
López, F.J. ; Carrasco, R.A. ; Farrell, P.G.
Author_Institution :
Sch. of Eng., Staffordshire Univ., Beaconside, UK
Abstract :
Multilevel convolutional codes based on rings of integers modulo-4 suitable for rectangular QAM constellations are presented. Codes performing at similar or better coding gains than binary TCM codes which have similar or less complex decoders than these and which, in addition, are 90° phase rotationally invariant are reported in this paper. This means a significant improvement on channels subject to likely loss of phase synchronisation
Keywords :
amplitude modulation; convolutional codes; trellis codes; coding gains; integers modulo-4; multilevel convolutional codes; phase synchronisation; rectangular QAM constellations; ring-TCM;
Conference_Titel :
Satellite Communications - ECSC-3, 1993., 3rd European Conference on
Conference_Location :
Manchester
Print_ISBN :
0-85296-603-2
