frequency division multiplexing频分多路复用
frequency division multiplexing频分多路复用
相关考题：
LTE室外同频组网下的频率规划演变成基于『____』的ICIC。(The frequency plan evolved into the ICIC based『____』in LTE network with the same frequency.)
在LTE系统中，为了支持成对的和不成对的频谱，支持频分双工(Frequency Division Duplex，FDD)模式和时分双工(Time Division Duplex，TDD)模式。LTE支持两种类型的无线帧结构：类型1，适应于全双工和半双工的FDD模式，类型2适应于TDD模式。()
在通信专业中，WDM的英文全称是（），吞吐量英文通常翻译为（）。A．Wierless Digital Modulation B．Wave Division Multiplexing C．Wavelength Division Multiplexing D．Wireless Data Modulation A．traffic flow B．rate C．throughout D．throughput
ZPPOSNetMAX-TLPersonal支持哪几种频率规划模式_A、BasedonSame_Frequency:同频组网B、BasedonSFR(NonExclusiveIC):模式3组网C、BasedonSFR(ExclusiveIC):模式4组网D、BasedonDiffer_Frequency:异频组网
对于LTE物理层的多址方案，在下行方向上采用基于循环前缀(Cyclic Prefix，CP)的正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)，在上行方向上采用基于循环前缀的单载波频分多址(Single Carrrier-Frequency Division Multiplexing Access，SC-FDMA)。()
关于FDD(Frequency Division Duplex，频分全双工)描述正确的是(23)。A．FDD是一种允许专用通信的频分技术B．FDD是一种允许动态介质分配的频分技术C．FDD是一种允许有保证的信息投递的频分技术D．FDD是一种允许双向或全双工通信的频分技术
OFDM的英文是()A.OverloadFrequencyDivisionMultiplexingB.Orthogonal?Frequency?Division?MultiplexingC.Overwhelming?Frequency?DivisionMultiplexingD.Outstanding?Frequency?Division?Multiplexing
You are the Cisco Network Designer in Cisco.com. Which of these is a Layer 2 transport architecture that provides packet－based transmission optimized for data based on a dual ring topology?() A. DynamicTrunking ProtocolB. Resilient Packet RingC. Synchronous Digital HierarchyD. Coarse Wave Division Multiplexing
The traditional way of allocating a single channel among multiple competing users is to chop up its ( ) by using one of the multiplexing schemes such as FDM (Frequency Division Multiplexing). If there are N users, the bandwidth is divided into N equal-sized portions, with each user being assigned one portion. Since each user has a private frequency ( ), there is no interference among users.When there is only a small and constant number of users, each of which has a steady stream or a heavy load of ( 本 题 ), this division is a simple and efficient allocation mechanism. A wireless example is FM radio stations. Each station gets a portion of the FM band and uses it most of the time to broadcast its signal.However, when the number of senders is large and varying or the traffic is ( ), FDM presents some problems. If the spectrum is cut up into N regions while fewer than N users are currently interested in communicating, a large piece of valuable spectrum will be wasted. If more than N users want to communicate, some of them will be denied ( ) for lack of bandwidth.?A. traffic B. dateC. burstyD. flow
Which two statements are true about optical networks?（）A、SONET and SDH both use time-division multiplexing.B、An optical transport network system uses time-division multiplexing.C、SONET and SDH both use wavelength-division multiplexing.D、An optical transport network system uses wavelength-division multiplexing.
对于LTE物理层的多址方案，在下行方向上采用基于循环前缀（Cyclic Prefix，CP）的正交频分复用（Orthogonal Frequency Division Multiplexing，OFDM），在上行方向上采用基于循环前缀的单载波频分多址（Single Carrrier-Frequency Division Multiplexing Access，SC-FDMA）。在上行方向上采用基于循环前缀的单载波频分多址（Single Carrrier-Frequency Division Multiplexing Access，SC-FDMA）。
FDM的英文是（）A、Overload Frequency Division Multiplexing B、Orthogonal Frequency Division Multiplexing C、Overwhelming Frequency Division Multiplexing D、Outstanding Frequency Division Multiplexing
EUTRA频内频间基于覆盖的切换由后台（）参数分别来控制频内、频间是基于事件的切换算法还是基于周期的切换算法。A、IntraF Handover MethodB、InterF Handover MethodC、Intra-frequency Handover StrategyD、Inter-frequency Handover Strategy
OFDM的英文全称是（）A、Orthogonal Frequency Division MultiplexingB、Outstanding Frequency Division MultiplexingC、Overwhelming Frequency Division MultiplexingD、Orthogonal Frequency Division Modulation
You are the Cisco Network Designer in Cisco.com. Which of these is a Layer 2 transport architecture that provides packet-based transmission optimized for data based on a dual ring topology?（）A、DynamicTrunking ProtocolB、Resilient Packet RingC、Synchronous Digital HierarchyD、Coarse Wave Division Multiplexing
WDM与（）本质是相同的。A、OFDM(optical frequency division multiplexing)B、OTDM(optical time division multiplexing)C、CDM(code division multiplexing)D、EDFA(erbium doped fiber amplifier)
多选题Which two statements are true about optical networks?（）ASONET and SDH both use time-division multiplexing.BAn optical transport network system uses time-division multiplexing.CSONET and SDH both use wavelength-division multiplexing.DAn optical transport network system uses wavelength-division multiplexing.
单选题You are the Cisco Network Designer in Cisco.com. Which of these is a Layer 2 transport architecture that provides packet-based transmission optimized for data based on a dual ringtopology？（）A Dynamic Trunking ProtocolB Resilient Packet RingC Synchronous Digital HierarchyD Coarse Wave Division Multiplexing
名词解释题Time division multiplexing时分多路复用