CDMA (Code Division Multiple Access)
第1题:
Circuit-switching technology is used in Publish Switched Telephone Network(PSTN), Global System for Mobile Communications(GSM) and code Division Multiple Access (CMDA) .It is a ( ) information transfer mode.
A.connection oriented
B.connectionless
C.high bandwidth utilization
D.poor real-time
第2题:
A. optical technology for transmitting up to 32 channels over multiple fiber strands
B. optical technology for transmitting up to 16 channels over multiple fiber strands
C. a WDM system that is compatible with EDFA technology
D. a technology for transmitting more closely packed optical signals using more sophisticated transceiver designs than CWDM .
第3题:
第4题:
根据《2GHzTD-SCDMA数字蜂窝移动通信网工程验收暂行规定》,WCDMA(Wideband Division Multiple Access)意思是()。
第5题:
Dense Wavelength Division Multiplexing (DWDM) is an important innovation in optical networks.Which two descriptions best define DWDM?()
第6题:
CDMA中用到的扩频序列是()
第7题:
OFDM的英文全称是()
第8题:
WDM与()本质是相同的。
第9题:
transfer control protocol
time division duplex
time division synchronous CDMA
time division multiple access
第10题:
第11题:
第12题:
第13题:
CDMA for cellular system can be described as follows. As with FDMA, each cell is allocated a frequency (71) , when is split into two parts, half for reverse (mobile unit to base station) and half for (72) (base station to mobile unit). For full-duplex (73) , a mobile unit both reverse and forward channels. Transmission is in the form. of direct-sequence spread (74) , which used a chipping code to increase the data rate of the transmission, resulting is 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.
A.ware
B.signal
C.bandwidth
D.domain
第14题:
第15题:
WCDMA英文全称是Wideband Code Division Multiple Access,其系统带宽、码片速率分别是(),()。
第16题:
码分复用(Code Division Multiplexing,CDM)中,各路信号码元在频谱上和时间上都是()的,但是不同用户传输的信号是靠各自不同的(正交)编码序列来区分的。
第17题:
FDM的英文是()
第18题:
CDMA移动通信系统中,Sych信道使用Walsh code(),其用于()
第19题:
Acceptance of deliverables to multiple locations requires which type of sign off?()
第20题:
connection oriented
connectionless
high bandwidth utilization
poor real-time
第21题:
I/O rate
bandwidth
signal loss
Dense Wavelength Division Multiplexing (DWDM)
第22题:
1.2288Mbps
1.28Mbps
3.84Mbps
第23题: