CDMA 计算题

[chenchangjun430]

1.一个采用CDMA方法的数字蜂窝无线电系统，有4个站点 ( A、B、C、D ) 的Chip Sequence如下：
A： (–1 –1 –1 +1 +1 –1 +1 +1 )
B： (–1 –1 +1 –1 +1 +1 +1 –1)
C： (–1 +1 –1 +1 +1 +1 –1 –1)
D： (–1 +1 –1 –1 –1 –1 +1 –1)
假定 A、C、D发送比特1，B发送比特0，问以上四站同时发送的Chip Sequence和是( )
a. –2 –2 +4 –2 +1 –2 0 0
b. –2 +2 –4 +2 0 –2 0 0
c. –2 +4 +1 0 +2 +1 0 0
d. –2 +1 –4 +2 0 +2 0 0

2.四个站点 ( A、B、C、D ) 的Chip Sequence同上，某个接收方收到一条Chip Sequence和为：(–1 +1 –3 +1 –1 –3 +1 +1)，C、D站发送的二进制位是( )
a. C、D站均发1； b. C未发、D发1；
b. C发1、D未发； d. C发0、 D发1。

[eeyyllehs]

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