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Abstract
In this presentation, we extend the iterative demapping technique to observation separation (OS), which is an iterative channel estimation and symbol detection procedure. We consider a BICM-ID on a multipath channel with coded packet oriented transmission system with 16-QAM. We propose here to analyse the influence of mapping in a turbo equalization. Then we proposed an optimized binary mapping of 16-QAM constellation in order to increase coding gain which can be used for some practically important cases
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