import numpy as np import scipy as sp import matplotlib.pyplot as plt f_c = 100E+6 f_m = 1E3 T_c = 1/f_c f_s = 1E9 T_s = 1/f_s A_c = 500 D_p = 100 D_f = 1E+6 omega_m = 2*np.pi*f_m omega_c = 2*np.pi*f_c # Time samples to 10 seconds at a samplig frequency of 8kHz t = np.arange(0,10*T_c,T_s) m_p = 0.2*np.cos(omega_m * t) m_f = -2E-5*omega_m*np.sin(omega_m * t) M_f = 2E-5*np.cos(omega_m*t) theta = D_f * M_f # The phase modulated signal s_p = A_c*np.cos(omega_c*t + D_p*m_p) s_f = A_c*np.cos(omega_c*t + theta) c = A_c*np.cos(omega_c *t) plt.plot(t, s_p, label="Phase Modulated Signal") plt.plot(t, s_p-c) #plt.plot(t, s_f, label="Frequency Modulated Signal") plt.show()