首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
计算机
CDMA for cellular systems can be described as follows.As with FDMA,each cell is allocated a frequency (71),which is split into
CDMA for cellular systems can be described as follows.As with FDMA,each cell is allocated a frequency (71),which is split into
admin
2019-05-15
57
问题
CDMA for cellular systems can be described as follows.As with FDMA,each cell is allocated a frequency (71),which is split into two parts,half for reverse(mobile unit to base station)and half for (72) (base station to mobile uni0.For full—duplex (73) ,a mobile unit uses both reverse and forward channels.Transmission is in the form of direct—sequence spread (74),which uses a chipping code to increase the data rate of the transmission,resulting in an increased signal bandwidth.Multiple access is provided by assigning (75) chipping codes to multiple users,SO that the receiver can recover the transmission of an individual unit from multiple transmissions.
(74)
选项
A、structure
B、spectrum
C、stream
D、strategy
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/nFDZ777K
本试题收录于:
网络工程师上午基础知识考试题库软考中级分类
0
网络工程师上午基础知识考试
软考中级
相关试题推荐
ItshouldgowithoutsayingthatthefocusofUMLismodeling.However,whatthatmeans,exactly,canbeanopen-endedquestion.
(71)analysisemphasizesthedrawingofpictorialsystemmodelstodocumentandvalidatebothexistingand/orproposedsystems.U
PPP(Point-to-PointProtocol)是SLIP(SerialLineIPprotocol)的继承者,它提供了跨过同步和异步电路实现路由器到路由器(router-to-router)和主机到网络(host-to-network)的连
阅读以下说明,回答问题1~4,将解答填入对应栏内。虚拟专用网是虚拟私有网络(VirtualPrivateNetwork,VPN)的简称,它是一种利用公共网络来构建的私有专用网络。对于构建VPN来说,网络隧道(Tunneling)技术是个关键技术
CDMAforcellularsystemscanbedescribedasfollows.AswithFDMA,eachcellisallocatedafrequency(71),whichissplitinto
(71)analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. U
In the open systems interconnection(OSI)reference model, "layer" means one of seven conceptually complete,(71)arranged groups
In the open systems interconnection(OSI)reference model, "layer" means one of seven conceptually complete,(71)arranged groups
In the open systems interconnection(OSI)reference model, "layer" means one of seven conceptually complete,(71)arranged groups
In the open systems interconnection(OSI)reference model, "layer" means one of seven conceptually complete,(71)arranged groups
随机试题
甲公司与乙公司签订借款合同,有权进行公证管辖的有()
下列哪一项不是促胰液素的作用
具有泻下攻积、润燥软坚、清热消肿功效的药物是
主动脉狭窄的体征除外
某甲自有城市房屋1间,2006年3月1日其与乙签订一份为期3年的房屋租赁合同由乙承租该房。同年8月6日丙向甲提出愿意购买该房屋,甲即将要出卖该房屋的情况告知乙。到了11月7日乙没有任何答复,甲与丙协商以50万元的价格将该房卖给丙,双方签订了房屋买卖合同,丙
注册咨询工程师(投资)的应用知识熟练程度主要强调()。
()不需要设置为数量金额式。
丽晶公司(系增值税一般纳税人)是一家股份公司,2010年度发生了以下部分事项:(1)公司自成立后,尚未发生一笔销售业务,没有收入,且属于国家批准的高新技术企业,享有国家免税政策,因此没有办理纳税申报。(2)3月16日,丽晶公司采用托收承付方式销售一批产
经营杠杆较高的行业()
一块平行四边形菜地,如果只把底增加8米,或只把高增加5米,它的面积都增加40平方米。那么这块平行四边形地原来的面积是多少?()
最新回复
(
0
)