基于SRS遍历容量的下行波束赋形性能研究
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摘要
波束赋形传输技术包括下行波束赋形和上行波束赋形。下行链路波束赋形是通过基于估算信道信息加权多天线的发射信号来实现的,从而增强在目标用户方向上的部分功率增益。上行链路波束赋形本质上是对来自不同天线单元信号进行加权和求和计算,以优化所需信号的质量并抵制干扰。简要描述下行链路波束赋形系统模型构建方案和最优获得空间相关矩阵值算法。在此基础上,详细阐述移动通信系统中下行链路波束赋形应用的基本原理,重点研究SRS遍历容量改进优势,分析波束赋形基准性能和多滴仿真性能的特点。结合链路层单一EBB衰落算法的结果,通过对短期和长期以及混合波束赋形技术的比较,得出了一些重要结论。
Beamforming transmission technology includes downlink and uplink beamforming.Downlink beamforming is achieved by weighting the transmit signals of multiple antennas based on estimating channel information,thereby enhancing partial power gain in the direction of target user.Uplink beamforming is essentially a weighted sum calculation of signals from different antenna units,optimizing the quality of the required signals and resisting interference.This paper gave a brief description of construction scheme for the downlink beamforming system model and the optimal spatial correlation matrix algorithm.On that basis,we elaborated the basic principle of downlink beamforming application in mobile communication system,emphatically studied the advantage of SRS ergodic capacity improvement,and analyzed the benchmark performance of beamforming and characteristics of more drops simulation performance.Combined with the result of the link layer single EBB decline algorithm,we compared the short-term and long-term and the hybrid beamforming technology and drew some important conclusions.
Beamforming transmission technology includes downlink and uplink beamforming.Downlink beamforming is achieved by weighting the transmit signals of multiple antennas based on estimating channel information,thereby enhancing partial power gain in the direction of target user.Uplink beamforming is essentially a weighted sum calculation of signals from different antenna units,optimizing the quality of the required signals and resisting interference.This paper gave a brief description of construction scheme for the downlink beamforming system model and the optimal spatial correlation matrix algorithm.On that basis,we elaborated the basic principle of downlink beamforming application in mobile communication system,emphatically studied the advantage of SRS ergodic capacity improvement,and analyzed the benchmark performance of beamforming and characteristics of more drops simulation performance.Combined with the result of the link layer single EBB decline algorithm,we compared the short-term and long-term and the hybrid beamforming technology and drew some important conclusions.
引文
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[2]郑占旗,阎跃,张立军,等.增加副瓣抑制机制的阵列天线波束赋形遗传算法研究[J].电子与信息学报,2017,39(3):690-696.
[3]国辛纯.基于波束赋形的星载自适应调零技术[J].无线电通信技术,2016,13(4):42-45.
[4]马晓峰,冯丹萍,吴玉清,等.一种星载阵列天线的高效波束赋形算法[J].电波科学学报,2016,31(3):479-485.
[5]李章义,万国宾,张静,等.抛物面天线小形变赋形及波束重构方法[J].系统工程与电子技术,2015,37(10):2217-2221.
[6]赵普,俞晖,罗汉文. MU-MISO场景下最优化和速率的波束赋形[J].上海师范大学学报(自然科学版),2015,44(1):60-64.
[7]王毅,钱叶旺,林艳,等.时间相关信道下分布式大规模MIMO系统频谱效率分析[J].信号处理,2016,32(11):1269-1282.
[8]陶成,李亚鹏,刘留,等.莱斯信道下大规模MIMO系统上行资源分配研究[J].北京交通大学学报,2016,40(5):50-55.
[9]冯文,周斌,郑敏,等.大规模MIMO系统的信道估计研究[J].计算机应用与软件,2016,33(12):89-92.