Abstract
We compute closed-form transfer characteristics for EXIT chart of short rate 1 block codes for binary erasure channel. These functions closely approximate the measurements over additive white Gaussian noise (AWGN) channel. Optimum irregular inner codes are derived for serial concatenated coding over AWGN channel. In addition, we apply the results on bit- interleaved coded modulation (BICM) and introduce signal set capacity on bit level. It is pointed out that capacity approaching performance with BICM requires new modulation schemes. Index Terms—BICM, EXIT chart, transfer characteristic, irregular code
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