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The possibilities of a known class of chaos‐based coded modulation (CCM) systems are expanded to address the problem of high‐power amplifier (HPA) non‐linearity. The hypothesis is that the CCM non‐linear nature can be exploited to counteract its effects on the system perfomance, avoiding the need of a predistorter. An optimisation method for the design of the CCM to prove this hypothesis is proposed. The results show that, for a given back‐off level, a non‐linear mapping function for the chaos‐based encoder and decoder can be designed to compensate the HPA effect on the error rate.

Optimisation of chaos‐based coded modulations for compensation of amplifier non‐linearities