Title :
Performance evaluation of concatenated coding schemes on multilevel QAM signalling in non-Gaussian products environment
Author :
Dimakis, C.E. ; Kouris, S.S. ; Avramis, S.K.
Author_Institution :
Fac. of Eng., Aristotelian Univ. of Thessaloniki, Greece
Abstract :
The performance of a concatenated coding scheme is studied over nonlinear channels when additive white Gaussian noise is considered in both the up and downlink. Bandwidth-efficient trellis codes using a 32-QAM signal set are used as inner codes and 3/4 rate convolutional codes as outer codes to achieve an overall bandwidth efficiency of 3 bit/s/Hz. Simulation results show that this coding system compared with an uncoded 8-PSK scheme, 3/4 convolutionally encoded 16-QAM systems and some TCM techniques, provides significant coding gains over linear and nonlinear channels.<>
Keywords :
amplitude modulation; convolutional codes; encoding; telecommunication channels; telecommunication signalling; trellis codes; 3/4 rate convolutional codes; 32-QAM signal set; TCM; additive white Gaussian noise; bandwidth efficiency; coding gains; coding system; concatenated coding; downlink; inner codes; linear channels; multilevel QAM signalling; nonGaussian products environment; nonlinear channels; outer codes; performance evaluation; simulation results; trellis codes;
Journal_Title :
Communications, Speech and Vision, IEE Proceedings I
