| Stiefel流形上的单边干扰对齐预编码 |
| |
| 引用本文： | 凌必祥,解培中,李汀.Stiefel流形上的单边干扰对齐预编码[J].信号处理,2018,34(1):81-88. |
| |
| 作者姓名： | 凌必祥 解培中 李汀 |
| |
| 作者单位： | 南京邮电大学通信与信息工程学院 |
| |
| 基金项目： | 国家自然科学基金(61471200,61771254)；江苏省自然科学基金(BK20140881)；南京邮电大学横向项目(2016外71)
|
| |
| 摘 要： | 干扰对齐通过在接收端重叠干扰能有效的提升干扰信道的容量。单边干扰对齐是指仅仅只有发射端参与的干扰对齐技术，它不需要接收端的参与，与双边干扰对齐技术相比可以大大的减小反馈量。本文在干扰子空间弦距离最小化的改进单边干扰对齐预编码算法方案的基础上，提出将预编码矩阵建模于Stiefel流形上，能够将有约束的最优化问题转化为无约束的最优化问题进行求解。仿真结果表明，将预编码矩阵在Stiefel流形上建模后求解与普通的最优化算法相比有更快的收敛速度和更高的和速率。
|
| 关 键 词： | 干扰对齐 Stiefel流形 和速率 预编码 |
| 收稿时间： | 2017-05-31 |
One-sided Interference Alignment Precoding on the Stiefel Manifold |
| |
| Affiliation: | School of Communication and Information Engineering,Nanjing University of Posts and? Telecommunications |
| |
| Abstract: | Interference alignment (IA) effectively improves the capacity of interference channel by overlapping the interference at the receivers.At present,most of the distributed interference alignments algorithm design precoder and receiver filter at both transmitters and receivers which causes overhead. In this paper, an improved one-side interference alignment precoding algorithm, which is based on the minimization of the chord distance of the interference subspace.we build the precoding matrix on a Stiefel manifold and make the constraint optimization problem be transformed into unconstraint optimization problem. The simulation results show that the precoding matrix build on the Stiefel manifold compared with the conventional optimization algorithm have the faster convergence rate and higher sum rate. |
| |
| Keywords: | |
|
| 点击此处可从《信号处理》浏览原始摘要信息 |
|
点击此处可从《信号处理》下载全文 |
