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In this paper a low complexity network coding scheme in TWRC is proposed. This scheme is based on soft information and employs Soft-Input Hard-Output (SIHO) channel decoding and designs detailed structures in source node, relay node and destination node. In design of SIHO decoder, Lloyd-Max quantizer and equal probability quantizer are compared. Furthermore, theoretical end-to-end BER bounds of proposed scheme through both AWGN and Rayleigh channels are given. Simulation results show that compared with existing network coding schemes in TWRC, proposed scheme has better BER performance and lower complexity.
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