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CDMA for cellular systems can be describ
CDMA for cellular systems can be describ
资格题库
2022-08-02
53
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 (本题) (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 ( ) chipping codes to multiple users, so that the receiver can recover the transmission of an individual unit from multiple transmissions.A.forwardB.reverseC.backwardD.ahead
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答案
A
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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