异构网络干扰对齐技术研究

发布时间：2018-03-10 19:36

本文选题：异构网络　切入点：干扰对齐　出处：《西安电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着无线网络的迅速发展,异构网络已经成为了现在通信网络的一个重要趋势,但是异构网络带来优势的同时,也有它本身需要解决的问题,其中干扰问题是需要解决的。目前为止,已经有很多关于异构无线网络干扰方面的文章,其中干扰对齐技术是一个重要的研究方向。论文首先对范德蒙德-子空间频分多址(VFDM)技术做了几点改进。论文通过使用范德蒙德-子空间频分多址技术将小基站对宏基站产生的干扰消除,又使用一种含有扩展群分方法的干扰对齐策略将小基站间的干扰对齐到更小的维度,通过使用这种群分方法降低了所需接收天线的数量。最后,论文推导出了该算法能够实现的用户自由度,并进行了算法的仿真实现。论文接着在一种异构无线网络上进行了机会调度的改进。该网络包含一个宏基站和任意多个小基站,其中小基站中的用户数量也是任意的。论文使用前人提出的弦距最小准则,实现了宏用户的次最优调度。该用户调度算法能够在系统总速率损失不明显的基础上,大大降低计算的复杂度。最后论文对算法进行了仿真,并且跟穷举算法进行了对比分析。
[Abstract]:With the rapid development of wireless network, heterogeneous network has become an important trend of communication network, but the heterogeneity network brings advantages, but also has its own problems to be solved. The interference problem needs to be solved. Up to now, there have been a lot of articles about interference in heterogeneous wireless networks. The interference alignment technique is an important research direction. Firstly, several improvements are made to VFDM technology. The small base station is realized by using Vandermond-subspace frequency division multiple access (VFDM) technology. Elimination of interference to Acer station, An interference alignment strategy with extended group subdivision is also used to align interference between small base stations to smaller dimensions, which reduces the number of receiving antennas required. This paper deduces the user degree of freedom that the algorithm can realize, and carries on the simulation realization of the algorithm. Then, the paper improves the opportunity scheduling in a heterogeneous wireless network. The network consists of a macro base station and any number of small base stations. The number of users in the small base station is arbitrary. The suboptimal scheduling of macro users is realized by using the minimum chord distance criterion proposed by the previous authors. The user scheduling algorithm can be used on the basis that the total rate loss of the system is not obvious. The computational complexity is greatly reduced. Finally, the algorithm is simulated and compared with the exhaustive algorithm.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5;TN972

【相似文献】