Abstract
This letter considers a code design for an asymmetric Slepian-Wolf multiple-access relay channel, in which the users and relay have different channel conditions. In this case, the conventional parity approach distributed source coding is no longer applicable. Hence, a new distributed joint source-channel superposition coding (DJSC-SC) is proposed. The proposed DJSC-SC matches the asymmetric channels, and makes full use of the good channel to obtain a better performance. Simulation results show that, compared with the conventional PA, the performance of the DJSC-SC scheme has a significant improvement and is within 1.4 dB from the capacity limit.
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