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【多选题】
若调制信号的带宽为B,则关于2ASK信号的调制解调以下说法正确的是 。A.
2ASK调制实际上是带信号的频谱搬移
B.
2ASK信号的带宽为B
C.
2ASK解调时需经过一个带通滤波器，该滤波器的带宽是2B
D.
2ASK解调时需经过一个带通滤波器，该滤波器的带宽是B
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A.
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B.
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C.
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D.
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E.
cannot make a reasonable guess from this information
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A.
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B.
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C.
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D.
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E.
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