一种智能的大规模MIMO部分导频复用调度方案

发布时间：2018-05-20 16:26

本文选题：大规模MIMO + 导频污染　；参考：《火力与指挥控制》2016年11期

【摘要】：导频污染被认为是多小区大规模MIMO通信系统的主要技术瓶颈,与以小区为单位进行导频复用方案不同,提出了一种减轻导频污染影响的优化的部分导频调度方案。该调度方案先将全部可用的正交导频序列划分为若干子集,把其中的一个导频子集设为导频复用子集,该导频子集在系统中每个小区复用,其余导频子集则在不相邻小区间复用;之后在目标小区基站对导频复用子集中的导频序列引起的小区间干扰进行测量,依次将导频复用子集中具有最小小区间干扰的导频序列分配给上行链路信道质量最差的用户,改善系统频谱利用率。分析和仿真结果显示该导频调度方案可以有效抑制导频污染,并且相比于目前已有的导频调度方案性能有所改进。
[Abstract]:Pilot pollution is regarded as the main technical bottleneck of multi-cell large-scale MIMO communication system. Different from the pilot multiplexing scheme based on cell unit, an optimized partial pilot scheduling scheme is proposed to mitigate the influence of pilot pollution. The scheduling scheme first divides all available orthogonal pilot sequences into subsets, and sets one of the pilot subsets into pilot multiplexing subsets, which are multiplexed in each cell of the system. The rest of the pilot subsets are multiplexed in non-adjacent cells, and then the inter-cell interference caused by the pilot sequences in the pilot multiplexing subsets is measured at the target cell base station. In turn, the pilot sequence with minimum inter-cell interference in the pilot multiplexing subset is assigned to the users with the worst uplink channel quality to improve the spectrum efficiency of the system. The analysis and simulation results show that the pilot scheduling scheme can effectively suppress pilot pollution, and compared with the existing pilot scheduling schemes, the performance of the pilot scheduling scheme is improved.
【作者单位】：武警工程大学;
【基金】：国家自然科学基金(61101238) 武警部队军事应用基金资助项目(WJK-201305)
【分类号】：TN919.3

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