Cell-Free Massive MIMO中没有小区,所有服务天线一致地为所有用户终端服务。 Cell-Free Massive MIMO目前只是一个新概念;它是MIMO与协作多点联合处理(Comp)的新实用且可扩展的版本。在某种程度上是基于良好传播和信道化化特性Massive MIMO技术的新应用。
摘要:本发明提供一种基于模式选择和功率分配的Cell‑FreeMassiveMIMO系统面向D2D通信的资源调度方法。步骤1:组装系统;步骤2:构建满足CFUE用户和D2D用户最小速率要求和功率要求情况下最大化整个系统传输速率的优化目标;步骤3:根据D2D用户的工作模式将其分为工作在本地路由模式的优化P1和工作在D2D直接模式下的优化P2以...
Cell-Free massive MIMO (cf-mMIMO) is an incarnation of distributed massive MIMO, which provides high spectral efficieny (SE). However, when the number of users increases, the SE of cf-mMIMO will decrease. In order to increase the SE when the number of users is large, many researchers ...
算法1的性能最好,相比较于Separate_OPT_CF,算法1对M=20,K=8的时间减少高达66%,对M=80,k=10的时间减少了64%。对比图可以看到功率和处理频率联合分配的优势,以及使用mMIMO来支持FL的好处。由于mMIMO技术,随着天线数量的增加,每一个UE的数据速率也会增加,导致一次FL迭代的执行时间减少了40%,如图2所示。 图2....
thecell-freemassiveMIMOsuffersfromenergyoverloadingcausedbyuncontrolledbackhaulpowerconsumptionforlargenumberofdistributedaccesspoints(APs)andpilotcontaminationduringchannelestimation.Inthispaper,wehavetakenintoconsiderationacell-freemassiveMIMOsystemwithAPsequippedwithmulti-pleantennasperformingtime-division-duplex(TDD)...
im 摘要 Cell-Free 大规模 MlMO(Massive Multiple-Input Multiple-Output, Massive M1MO) 通过部署成百上千个无线接入点(Access Points, APs),采用时分双工(Time Division D叩lexing,TDD)操作模式,利用同一时频资源服务于所有用户(User Equipment, UE),并连接中央处理单元(Central Processing Unit,CPU)进行上下行用...
Cell-Free Massive Multiple Input Multiple Output (M-MIMO) is a system where a large number of low-cost single antenna Access Points (APs) are distributed over a specific area. The APs are connected to a Network Controller (NC) and serve all the existing users simultaneously. This work propo...
Cell-Free 大规模 MIMO(Massive Multiple-Input Multiple-Output,Massive MIMO)通过部署成百上千个无线接入点(Access Points,APs),采用时分双工(Time Division Duplexing,TDD)操作模式,利用同一时频资源服务于所有用户(User Equipment,UE),并连接中央处理单元(Central Processing Unit,CPU)进行上下行用户传输和信号处理,...
−foldincreasein95%-likelyper-userthroughput,comparedwiththesmall-cellsystem.Furthermore,Cell-Freesystemsaremorerobusttoshadowfadingcorrelationthansmall-cellsystems.I.INTRODUCTIONInMassiveMIMO,largecollocatedordistributedantennaarraysaredeployedatwirelessbasestations[1].CollocatedMassiveMIMOarchitectures,whereallservice...
Keywords: Cell-Free massive MIMO system, caching placement, cooperative caching, content transmission delay 1 引言 随着全球移动互联网的发展,移动通信流量呈 爆发式增长.然而,现有的移动通信系统架构都以 蜂窝小区为基础,随着网络的密集化,小区间干扰 愈发严重,这将严重影响小区边缘用户的信号质量 和系统服务质量...