Slide 6
Slide 6 text
ݕճ࿏
৴߸͔ΒแབྷઢΛͱΓͩ͢
߭ੴμΠΦʔυ͕ϑΟϧλͱͳͬ
͍ͯΔ
࣮ḊͼͨΧϛιϦͷਕͱΤϯϐπ
ͷਊͰΠέΔ
͍ΘΏΔ foxhole radioʢᆠߺϥ
δΦʣ
import numpy as np
from scipy.signal import hilbert
t = np.linspace(0,1,2048)
E0 = 1
fc = 20
phi_c = 0
fm = 2
m = 0.9
phi_m = 0
E = E0*np.cos(fc*2*np.pi*t + phi_c)
x = m*np.sin(fm*2*np.pi*t + phi_m)
E_m = E0*np.cos(fc*2*np.pi*t + phi_c) \
*(1 - (m/2)*(1-np.sin(fm*2*np.pi*t+phi_m)
signal = hilbert(E_m)
envelope = np.abs(signal)
6 / 18