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Performance evaluation of concatenated coding schemes on multilevel QAM signalling in non-Gaussian products environment

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3 Author(s)
C. E. Dimakis ; Fac. of Eng., Aristotelian Univ. of Thessaloniki, Greece ; S. S. Kouris ; S. K. Avramis

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.<>

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IEE Proceedings I - Communications, Speech and Vision  (Volume:140 ,  Issue: 4 )