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【多选题】

LTE高铁组网所面临的挑战（）。

A.
用户使用业务丰富，容量规划困难
B.
多普勒频偏效应，影响接收端解调
C.
列车穿透损耗较大，车内覆盖效果不足
D.
速度快，小区间切换频繁
E.
覆盖场景复杂多样，从城区到郊区
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题目标签：挑战
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A.
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B.
全球能源互联网
C.
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D.
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A.
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B.
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C.
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D.
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