ITU-R对4G标准的要求是能够提供基于IP的高速语音、数据和流式多媒体服务，支持的数据速率至少是（ ），选定的多路复用技术是（ ）。
问题1选项
A.10Mb/s
B.100Mb/s
C.20Mb/s
D.1Gb/s
问题2选项
A.OFDM
B.QPSK
C.MIMO
D.64-QAM
正确答案及解析
正确答案
解析
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