Bit-Interleaved Coded Modulation
Foundations and Trends in Communications and Information Theory
Design of repeat-accumulate codes for iterative detection and decoding
IEEE Transactions on Signal Processing
Analysis and design of symbol mappers for iteratively decoded BICM
IEEE Transactions on Wireless Communications
IEEE Transactions on Information Theory
Bit-interleaved coded modulation
IEEE Transactions on Information Theory
Extrinsic information transfer functions: model and erasure channel properties
IEEE Transactions on Information Theory
IEEE Journal on Selected Areas in Communications
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We propose an approach using the parameterization of extrinsic information transfer (EXIT) functions for symbol mapping design in bit-interleaved coded modulation (BICMID). The EXIT function of demapper is parameterized by a weighed sum of binomial functions. The set of binomial functions is then transformed to an orthonormal basis. Based on the parametric approach, the flatness criterion, aiming at achieving a faster convergence rate in term of number of iterations, can be formulated and symbol mappings can be found by a searching method. Simulation results confirm that good performances can be achieved in terms of convergence rate for fast fading channels when a good (near capacity-achieving) code is employed.