摘要
主要研究一个中继和两个用户,用户和中继都是多天线的系统信道模型。双向中继相比于单向中继可以提高系统的频谱效率。我们在信道估计中引入了误差,然后利用梯度下降迭代算法计算基于最大和速率下的权值矩阵F。运用公式计算最大和速率和误码性能,仿真结果表明,在信道误差达到一定大的情况下,在高信噪比的时候系统的性能受到较大影响。
Abstract:This paper considers two-way relaying systems with a multiple-input multiple-output (MIMO)relay between two MIMO terminal nodes. The two-way relaying protocol can enhance the spectral efficiency compared with the one-way protocol. We introduce the channel estimation error, then use a gradient descent iteration algorithm based on the maximum rate to get the weight matrix F. Calculating the maximum rate and bit error rate, the simulation results show that when the channel estimation error reaches a certain value, the system's performance can be great influenced.
出处
《电子器件》
CAS
北大核心
2013年第4期546-549,共4页
Chinese Journal of Electron Devices
基金
国家自然科学基金项目(61271230)