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# Python programming about the Fourier transform signal and Amplitude modulation. alt="屏幕快照 2019-09-23 下午3.07.55.png" /> ATTACHMENT PREVIEW Download attachment 屏幕快照 2019-09-23 下午3.07.55.png Given a message consists of two triangles: m(t) = A( t + 0.01 0.01 - 4 t - 0.01 0.01 The modulation and demodulation process of the double sideband-suppressed carrier (DSB- SC) can be described in Figure 5, in which, the frequency fc of the sinusoidal carrier wave c(t) = cos(27 fet) is 500H z. The low-pass filter at the demodulator has a bandwidth of 150Hz. Use Python to sketch m(t) and the signals at point a, b and c in time domain and frequency domain. cos(27 fet) m(t) a b C LPF m' ( t ) cos(27 fet)

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