一种信道编码与物理层网络编码的联合设计

基于正交振幅调制（QAM）设计了一种信道编码与物理层网络编码的联合实施方案，该方案巧妙的引入了一种去噪映射机制，即重新安排QAM调制的星座映射，中继节点对接收数据去噪后直接映射为对应数字比特流的异或。同时，利用卷积码和MAC-XOR网络编码（Network Coding, NC）的线性性质，使得中继节点只需直接估计网络编码的码字，因此中继节点的解调/译码的复杂度减少50%。在此基础上对该方案的误比特率性能进行分析。仿真结果表明了该方案的有效性，即与已有的物理层网络编码方法相比，在没有增加译码复杂度的基础上，该方案的信道容量有了显著提高。 

A New Joint Design of Physical Layer Network Coding and Channel Coding for Wireless Networks

In this paper we consider a two-way relaying system,where two source terminals n_1 and n_3 desire to exchange information through a relay node n_2.To decode the superimposed signal from n_1 and n_3 efficiently,we proposes a practical scheme of joint physical network coding(PNC)and channel coding for multiple-access channel based on QAM modulation in the multiple access (MAC)stage of the investigated two-way relay scenario.The proposed scheme employs a denoising-mapping plan ingeniously,where the relay node ...