f0 = 2e9
tinitial = 3 / f0 / 4
# system transfer function
H = lambda f: np.exp(-f**2.0 / f0**2.0 / 2)
# Signal constellation
c = cl.pam_constellation(16, title='16-PAM')
# Plot PAM constellation
plt.close('all')
c.plot()
c.plot_map()
# set bits to be transmitted
bits = cl.random_bits(32)
# build input waveform and plot
x = cl.digital_signal(TS=TS,
samples_per_symbol=samples_per_symbol,
tinitial=tinitial,
tguard=tguard,
constellation=c,
fcarrier=f0)
x0 = cl.digital_signal(TS=TS,
samples_per_symbol=samples_per_symbol,
tinitial=tinitial,
tguard=tguard,
constellation=c,
fcarrier=0)
import commlib as cl
import matplotlib.pyplot as plt
M = 4
TS = 1e-9
samples_per_symbol = 200
f0 = 2e9
Nbits = 8
c = cl.psk_constellation( M = M )
x = cl.digital_signal( TS = TS, samples_per_symbol = samples_per_symbol,
constellation = c, fcarrier = f0 )
bits = cl.random_bits( Nbits )
x.modulate_from_bits( bits )
x.plot( close_all = True )
plt.grid()