An Iterative Interference Cancellation Algorithm for Large Intelligent Surfaces
An Iterative Interference Cancellation Algorithm for Large Intelligent Surfaces
复制标题
大型智能表面的迭代干扰消除算法
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Liang Liu
中科院分区：
文献类型：
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作者：
Jesús Rodríguez Sánchez;F. Rusek;O. Edfors;Liang Liu
大型智能表面(LIS)概念是一种很有前途的技术，旨在通过最大限度地利用空间复用来彻底改变无线通信。尽管LIS具有很大的潜力，但由于LIS的大小和所涉及的大量天线单元，需要分散的体系结构和分布式算法来降低中央处理单元(CPU)的互连数据率和计算需求。本文针对LIS系统中的上行链路检测问题，提出了一种基于面板的分布式结构，完成局部的线性处理。我们还给出了这种结构的和速率容量，并推导出了一种以最大化和速率容量为目标的均衡器的算法。文中还给出了性能分析，包括与基于简化形式的匹配滤波(MF)方法的朴素方法的比较。实验结果表明了该算法的优越性。
The Large Intelligent Surface (LIS) concept is a promising technology aiming to revolutionize wireless communication by exploiting spatial multiplexing at its fullest. Despite of its potential, due to the size of the LIS and the large number of antenna elements involved there is a need of decentralized architectures together with distributed algorithms which can reduce the inter-connection data-rate and computational requirement in the Central Processing Unit (CPU). In this article we address the uplink detection problem in the LIS system and propose a decentralize architecture based on panels, which perform local linear processing. We also provide the sum-rate capacity for such architecture and derive an algorithm to obtain the equalizer, which aims to maximize the sum-rate capacity. A performance analysis is also presented, including a comparison to a naive approach based on a reduced form of the matched filter (MF) method. The results shows the superiority of the proposed algorithm.