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In this letter, we consider the bit mapping (BM) design for regular low-density parity-check (LDPC) coded bit-interleaved coded modulation (BICM) schemes. We propose a check-node type distribution and develop multi-edge type extrinsic information transfer (EXIT) functions for the regular LDPC coded BICM schemes. Based on the EXIT functions, we propose a two-phase design method to generate the optimized...
We propose a new low-density parity-check (LDPC) coded binary physical-layer network coding (PNC) scheme for Gaussian two-way relay channels. In this scheme, we introduce a bit mapper between the LDPC encoder and the modulator, which considers the unequal error protections brought by the high order PSK modulations. We add a new bipartite sub-channel graph consisting of sub-channels and variable nodes...
To improve the performance further for the bit- interleaved coded modulation with iterative decoding (BICM-ID) system, a modified extrinsic information transfer (EXIT) model is presented, in which the decoding and the demodulation are modeled as two iterative processing units. By using the binary erasure channel (BEC) approximation for the a priori AWGN channel, the analytical formulation of mutual...
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