• 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=271x146]18032d684575db8.jpg[/img]
    A: [img=246x25]18032d685125929.jpg[/img]
    B: [img=275x25]18032d685cf2303.jpg[/img]
    C: [img=293x25]18032d686786c17.jpg[/img]
    D: [img=410x24]18032d6871cee4d.jpg[/img]