• 2022-06-15
    双边带调制信号uDSB的频谱如图所示,其时域表达式为()。[img=248x136]1803d581fa8ca2a.png[/img]
    A: uDSB = 2cos2p ´ (106 + 103)t V
    B: uDSB = cos2p ´ 103tcos2p ´ 106t V
    C: uDSB = cos2p ´ 103t + cos2p ´ 106t V
    D: uDSB = cos2p ´ (106 + 103)t + cos2p ´ (106 - 103)t V