Efficient Computation of EXIT Functions for Nonbinary Iterative Decoding |
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Authors: | Kliewer J. Ng S. X. Hanzo L. |
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Affiliation: | Commun. Res. Group, Southampton Univ.; |
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Abstract: | The calculation of nonbinary extrinsic information transfer charts for the iterative decoding of concatenated index-based codes is addressed. We show that the extrinsic information at the output of a constituent a posteriori probability decoder can be calculated with very low complexity, where expensive histogram measurements are not required any more. An example for turbo trellis-coded modulation demonstrates the capabilities of the proposed approach |
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