Joint correlation exploitation and network coding in two-way relaying systems.

In this paper, we focus on the encoding/decoding designing and its performance analysis for a two-way relaying system. In the two-way relaying system, two source points broadcast their information to a group of relays in different phases. The relays lightly decode the received signals from them to estimate the information of two source points. An exclusive OR (XOR)-based network coding is then performed by each relay over two estimated binary sequences even though they contain errors. Each relay re-encodes the XORed information using concatenated convolutional codes and forwards the coded information to two source points. A joint decoding scheme which utilizes the correlation knowledge among the relayed information is proposed to reduce the energy consumption and to achieve well performance. Simulation results show that the proposed scheme can signi canlly reduce the energy consumptions and can achieve full diversity order. [ABSTRACT FROM AUTHOR]