import sys
from qam import Qam
from matplotlib import pyplot as plt
if len(sys.argv) != 2:
print("Usage: %s <data-bits>" % sys.argv[0])
exit(1)
modulation = {
'00': (1, 0),
'01': (1, 90),
'10': (1, 180),
'11': (1, 270),
}
q = Qam(baud_rate=10, bits_per_baud=2, carrier_freq=50, modulation=modulation)
s = q.generate_signal(sys.argv[1])
plt.figure(1)
q.plot_constellation()
plt.figure(2)
s.plot(dB=False, phase=False, stem=False, frange=(0, 500))
import sys
from qam import Qam
from matplotlib import pyplot as plt
if len(sys.argv) != 2:
print "Usage: %s <data-bits>" % sys.argv[0]
exit(1)
modulation = {
'0' : (1,0),
'1' : (1,180),
}
q = Qam(baud_rate = 10,
bits_per_baud = 1,
carrier_freq = 50,
modulation = modulation)
s = q.generate_signal(sys.argv[1])
plt.figure(1)
q.plot_constellation()
plt.figure(2)
s.plot(dB=False, phase=False, stem=False, frange=(0,500))
'0100': (1.4142, 225.0000),
'0101': (1.1180, 243.4350),
'0110': (1.4142, 315.0000),
'0111': (1.1180, 296.5650),
'1000': (1.1180, 153.4350),
'1001': (0.7071, 135.0000),
'1010': (1.1180, 26.5650),
'1011': (0.7071, 45.0000),
'1100': (1.1180, 206.5650),
'1101': (0.7071, 225.0000),
'1110': (1.1180, 333.4350),
'1111': (0.7071, 315.0000),
}
q1 = Qam(baud_rate=10,
bits_per_baud=4,
carrier_freq=10e3,
modulation=modulation)
q2 = Qam(baud_rate=10,
bits_per_baud=4,
carrier_freq=9.9e3,
modulation=modulation)
s = q1.generate_signal(sys.argv[1]) + q2.generate_signal(sys.argv[2])
plt.figure(1)
#q.plot_constellation()
plt.figure(2)
s.plot(dB=False, phase=False, stem=False, frange=(0, 12e3))
X[m] += x[n] * np.exp(np.pi * 2j * m * n / N)
return X / N
numberSubcarriers = 64
cyclicPrefix = numberSubcarriers / 4
numberPilots = 8
pilotValue = 3 + 3j
carriers = np.arange(numberSubcarriers)
pilotCarriers = carriers[::numberSubcarriers // numberPilots]
pilotCarriers = np.hstack([pilotCarriers, np.array([carriers[-1]])])
print(pilotCarriers)
dataCarriers = np.delete(carriers, pilotCarriers)
print(dataCarriers)
bitsSymbol = 4 #16 qam...implementar modulacoes
bitsOfdmSymbol = bitsSymbol * len(dataCarriers)
"""
x = np.random.rand(1024,)
X = naive_DFT(x)
Y = naive_IDFT(X)
print(x)
print(X)
print(Y)
"""
qam2 = Qam("16_QAM")
qam2.plotConstellation()