无线网络中基于MPSK的物理层网络编码  

Physical-layer network coding based on MPSK in wireless networks

作　　者：王静[1] 刘向阳[2] 王新梅[1] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室西安710071 [2]西安通信学院军事综合信息网教研室西安710106

出　　处：《高技术通讯》2009年第2期147-150,共4页Chinese High Technology Letters

基　　金：863计划(2007AA01Z215);国家自然科学基金(60502046,90604009,60573034)资助项目

摘　　要：提出了一种新的物理层网络编码方法,将无线网络中物理层网络编码采用的调制方法推广到八进制相移键控(8PSK)以及多进制相移键控(MPSK)。该方法在中继节点采用星座映射,将MPSK和信号星座映射到MPSK信号星座。接收节点收到MPSK信号后进行解调,借助已有信息进行译码(异或)操作,得到对方节点信息,完成信息交换。仿真验证了该方法的有效性,与已有的物理层网络编码方法相比,该方法在中继节点节约了50%的能量消耗,进一步提高了信息传输速率。This paper presents a new physical-layer network coding （PNC） method, which extends the modulation method in PNC to 8 phase-shift keying （8PSK） and M-ary phase-shift keying （MPSK）. The method adopts constellation mapping in the relay node, and the constellation of MPSK sum-signals should be mapped into the original MPSK constellation. To obtain the other receiver＇s information and implement information exchange, each receiver demodulates the corresponding MPSK signal obtained and decodes （XOR） the bit information from the demodulator with its own. The simulation results show that the new method is effective, and compared with the original PNC method, this method can reduce 50% energy consumption in the relay node, and improve the information transmission rate.

关 键 词：网络编码 物理层 信息交换 多进制相移键控(MPSK) 

分 类 号：TN92[电子电信—通信与信息系统]