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Cooperative communication is a well known technique to yield transmit diversity in the case of fading channels and to increase the spectral efficiency in the case of Gaussian channels. Error-correcting codes have to be carefully designed to achieve the promised gains. Good LDPC codes are known for fading channels and for Gaussian channels, but an LDPC code ensemble that performs well on both channels...
In this paper we study LDPC code design in block-fading (BF) channels. Our main purpose is to introduce a new Root Check (RC)-LDPC code design which obtains full diversity whilst delivering improved coding gain relative the other LDPC code designs. More specifically, we show that when our codes are combined with the check splitting method for the ARQ BF channels, we obtain the highest coding gain...
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