知识与财富的链接
设计了一个由网络编码协作下的非正交用户合作系统,并引入了卷积码进行编码传输。中继用户处解码后的源用户有效数据通过线性网络编码组合在一起,传送到基站从而获得分集增益。在接收端,采用一种二重迭代多用户检测办法,并提出了新的接收机方案。采用一种码片级的算法性能评估技术＂SNR evolution＂,对系统容量进行分析。对BER和系统容量的仿真分析表明：文中所讨论的合作机制是对付信道衰落的有效办法,它能够提供可观的用户合作分集增益,减少多用户系统的误码率;整个系统具有较高的系统容量。
This paper designs a network-coded non-orthogonal multi-access user cooperative system,and convolutional code is employed to transfer messages.The source users' messages obtained in the relay where they get correctly decoded are XOR together and re-transmitted forward to the destination to obtain diversity gain.In the receiver,a dual iterative multi-user detection scheme is developed and the receiver architecture is redesigned.Besides,a novel performance evaluation technique for the chip-by-chip algorithm c...