CDMA for cellular systems can be describ

题库2022-08-02 85

问题 CDMA for cellular systems can be described as follows.As with FDMA，each cell is allocated a frequency（），which is split into two parts,half for reverse（mobile unit to base station）and half for（）（base station to mobile unit）.For full-duplex（）.a mobile unit uses both reverse and forwardchannels.Transmission is in the form of direct-sequence spread（）,which uses a chipping code to increase the data rate of the transmission,resulting inan increased signal bandwidth.Multiple access is provided by assigning（本题）chipping codes to multiple users,so that the receiver can recover the transmission of an individual unit from multiple transmissions.A.concurrentB.orthogonalC.higherD.lower

选项 A.concurrent
B.orthogonal
C.higher
D.lower

答案 B

解析

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本试题收录于：中级网络工程师题库软件水平考试初中高级分类

中级网络工程师

软件水平考试初中高级

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