简介:CapacityofMIMOLAS-CDMAsystemsundermulti-pathfadingchannelswithtwodifferentcorrelatingmodelswerestudiedinthepaper.Influencesofthetwomodelsparametersoncapacitywereanalyzed.Thenumericalresultspresentthat:accordingtotheVariousScatteringEnvironmentscorrelatingmodel,whentheinner-elementsdistanceofantennasarrayislargethan0.5λ,correlationalmostdoesnottakefromthesystemcapacity;fortheSalz-Wintercorrelatingmodel,thespreadangleatreceiveristheotherkeyfactor,italsoinfluencethesystemcapacitygreatly.
简介:鉴于移动台的复杂度和功率的局限,本文描述一种应用于移动台的智能天线结构,它采用自适应阵列与RAKE接收机相结合的结构,其中自适应算法使用归一化最小均分算法(N-LMS),我们结合CDMA2000系统前向链路的特点进行系统仿真,结果表明移动台使用智能天线性能比使用单极天线有所提高,且性能的提高受移动台速率的影响。