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We treat the LDPC code design for relay channels in this paper. The capacity of relay channels has been analyzed in current literature. How to approach such capacity with the aid of good codes is, however, a challenging problem. An efficient structure is proposed to decouple the factor graph (FG) of a B-block transmission into successive partial FGs, and then, the code design can be performed over...
We propose a simple pulse-amplitude modulation (PAM)-based coded modulation scheme that overcomes two major constraints of power line channels, viz., severe insertion-loss and impulsive noise. The scheme combines low-density parity-check (LDPC) codes, along with cyclic random-error and burst-error correction codes to achieve high-spectral efficiency, low decoding complexity, and a high degree of immunity...
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