1. Matlab实现基带信号s(t)=cos(wt)的时域波形和频域结果 2. Matlab实现中频信号(基本载频+信号频率)的时域波形和频域结果 -1. Matlab baseband signal s (t) = cos (wt) time-domain waveform and frequency-domain results. Matlab intermediate frequency signal (the basic carrier frequency the+ signa