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am-dsb

于 2012-03-30 发布 文件大小:122KB
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  AM、DSB 调制及解调 用matlab产生一个频率为1Hz,功率为1的余弦信源m(t),设载波频率ωc =10 Hz, m0 = 2 ,试画出: 􀁺 AM 及DSB 调制信号的时域波形; 􀁺 采用相干解调后的 AM 及DSB 信号波形; 􀁺 AM 及DSB 已调信号的功率谱; 􀁺 调整载波频率及 m0,观察分的AM 的过调与DSB 反相点现象。 􀁺 在接收端带通后加上窄带高斯噪声,单边功率谱密度0 n = 0.1,重新解调。 (AM, DSB modulation and demodulation Matlab produce a frequency for 1 Hz, power of 1 cosine source m (t), set the carrier frequency ω c = 10 Hz, M0 = 2, try drawing out: )

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