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中文摘要：
近年来,在无线通信领域受到广泛关注的网络编码技术,允许中继节点对接收到的多路数据流进行适当处理后转发多路数据流的合成信息。MIMO双向中继通信网络中网络编码方法分为两个阶段：两信源节点分别将预发送的数据行格约简辅助（LRA）进行预编码操作,然后发送给中继节点;中继节点利用概率分布特性估计去除噪声的异或阈值区域,利用异或阈值区域对接收到的混合信号进行区域量化处理,并将结果广播给两信源节点。仿真结果表明,本文所提出的网络编码方法比经典的放大转发MIMO双向中继网络编码方法在性能上获得了较大的增益。
英文摘要：
Recently,the network coding which permitting relay node make a properly process for the received multiple information and forward to muhiple nodes has attracted a great deal of concerns. The MIMO two way relay network coding could divided into two phases： the first phase,the two sources separately use the precoding design method which based on the lattice basis reduction to precoding the transmitted signal,then transmit simultaneously to relay node,the second phase,relay node uses the means of probability analysis to get the threshold region of bit-wise exclusive-or （XOR） and realize the XOR mapping, then broadcasts the XOR data to the two source nodes. Performance evaluations confirm that the proposed method can significantly improve the bit error ratio over the straight amplify and forward multiple antenna two way relay network coding.
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