大工至善|大学至真分享 http://blog.sciencenet.cn/u/lcj2212916

博文

[转载]【电信学】【2018.07】毫米波大规模MIMO波束形成通信模拟器的系统设计方法

已有 339 次阅读 2019-11-8 19:46 |系统分类:科研笔记|文章来源:转载

本文为美国东北大学(作者:Zhengnan Li)的硕士论文,共40页。

 

随着数据流量需求的增长,使用传统低于6 GHz频段的无线网络体系结构正在逐渐逼近其传输容量极限。毫米波(mmWave)通信是一种变革的模式,因为它有可能获得超过每秒几千兆位的吞吐量,带宽可达到2 - 4GHz。然而,它也会引起高水平的信号衰减,这就给距离增大的连接带来了挑战。相对较高的路径损耗可以通过波束形成技术来减轻,在波束形成技术中,信号能量通过适当地加权到天线元件的相位,从而能够定向到特定的用户或目标。此外,相对较小的毫米波波长也使得在较小的表面积内使用大规模天线单元成为可能。因此,所谓的“大规模”天线单元集群已经是可能的。

 

本文提出了一种基于毫米波网络结构的系统模拟器设计,满足下一代电信(5G)的要求。本文提出了一种基于多输入多输出(MIMO)的大规模物理层(PHY)模拟器设计方案,并在MATLAB中实现。它由符合IEEE802.11ad标准的收发器设计、3GPPTR 38.901信道模型和波束形成性能评估平台组成。模拟器有助于评估不同的波束形成算法,以及介质访问控制(MAC)层设计过程。此外,还提出了一种调制编码方案(MCS)选择机制,以保证上层对时间和吞吐量的要求。利用TR 38.901提出的不同的集群延迟线(CDL)配置文件,模拟了收发信机的包误码率(PER)结果。

 

With the growth of data traffic demands,wireless network architectures that use traditional sub-6 GHz frequency bandsare now reaching their capacities. Millimeter wave (mmWave) communication is atransformative paradigm given its potential to attain throughput that goesbeyond several gigabits per second, with over 2-4GHz of bandwidth. However, italso incurs high levels of signal attenuation that raises challenges inconnectivity with increasing distance. The relatively high pathloss can bemitigated via beamforming technique, where signal energy is directed towards aspecific user or target by appropriately weighting the phases of the antennaelements. In addition, the comparatively small millimeter wavelength alsoallows practicability of employing massive antenna elements within a smallsurface area. Thus, so called ‘massive’ clusters of antenna elements are nowpossible. This thesis presents a systematic simulator design for mmWave-basednetwork architectures, fulfilling the requirements of next generation oftelecommunication (5G). In this thesis, a beamforming enabled massive multipleinput multiple output (MIMO) based physical (PHY) layer simulator design isproposed and implemented in MATLAB. It consists of IEEE 802.11ad standardcompliant transceiver design, 3GPP TR 38.901 channel model, and beamformingperformance evaluation platform. The simulator facilitates assessment ofdifferent beamforming algorithms, as well as Medium Access Control (MAC) layerdesign process. Along with the transceiver, a Modulation and Coding Scheme(MCS) selection mechanism is also proposed to guarantee timing and throughputrequirements from upper layer. Packet Error Rate (PER) results of thetransceiver is simulated with different Clustered Delay Line (CDL) profilessuggested by TR 38.901.

 

 

1. 引言

2. 802.11ad物理层简介

3. 3GPP技术报告38.901信道模型简介

4. 802.11ad接收机参考设计与性能分析

5. 波束形成简介

6. 基于波束形成的大规模MIMO物理层仿真

7. 结论


更多精彩文章请关注公众号:qrcode_for_gh_60b944f6c215_258.jpg



http://blog.sciencenet.cn/blog-69686-1205398.html

上一篇:[转载]【电力电子】【2012.07】三相升压整流器设计
下一篇:[转载]【无人机】【2005.12】低雷诺数无人机的螺旋桨性能测量

0

该博文允许注册用户评论 请点击登录 评论 (0 个评论)

数据加载中...

Archiver|手机版|科学网 ( 京ICP备14006957 )

GMT+8, 2019-12-14 10:06

Powered by ScienceNet.cn

Copyright © 2007- 中国科学报社

返回顶部