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若信号通路中有用信号的功率Ps=10mW,噪声功率PN=0.1mW ,则该信号通路中的信噪比为( )
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若信号通路中有用信号的功率Ps=10mW,噪声功率PN=0.1mW ,则该信号通路中的信噪比为( )
A、20dB
B、10dB
C、1dB
D、100dB
时间:2021-07-17 23:28
关键词:
机械制造与自动化
高起专
测试与传感技术
2020年第二学期期末考试
答案解析
A
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