Abstract:

Based on the amplify and forward-cylic delay codes-orthogonal frequency division multiplexing (AF-CDC-OFDM) technology, a differential network coding method with multi-relay cooperation is proposed over the multi-carrier and frequency selective two-way relay channel. The two-way terminals can obtain the maximum cooperation diversity gains and frequency diversity gains through the distributed relay cyclic delay coding and power amplification processing. However, the two terminals need to eliminate the self-interference component among received  signals before detecting the transmit symbol. Therefore, a self-interference elimination method is proposed with correlation statistical processing. The simulation results demonstrate that the proposed differential network encoding method can obtain the full diversity gain, and the proposed self-interference component eliminating method only has 0.5 dB SNR loss compared with the Genie-aided method over the slow fading channel.