def mod(input, modScheme, levels, encoding): bitsPerSymbol = int(math.log(levels,2)) # Fails if it is not possible to modulate the number of bits passed # given the number of bits per symbol assert (len(input) % bitsPerSymbol == 0) if modScheme == MOD_SCHEME_PSK: return PSK.mod(input, levels, encoding) if modScheme == MOD_SCHEME_QAM: return QAM.mod(input, levels, encoding)
print('A: process debug data')
print('M: QAM Modem')
print('X: Exit')
print('>> ')
while True:
if msvcrt.kbhit():
c = msvcrt.getch().decode("utf-8")
print(c)
c = c.lower()
if c == 'a': ## Qam16 modem
payload = (np.random.rand(100) * 256).astype(np.uint8)
txBaseband = QAM.modulation(payload,
QAM.Constant.ModulationType.QAM16)
#plt.plot(txBaseband.real, txBaseband.imag, 'bo')
#plt.grid()
#plt.show()
tx_upsampled = rf.UpSampling(txBaseband, 5 / 100, 100)
tx_mixer = rf.Mixer(tx_upsampled, 30 / 100, np.pi / 4)
tx_sig = tx_mixer.real + rf.WhiteNoise(tx_mixer, 50)
#sp.fftPlot(txBaseband.real, txBaseband.imag, n=2)
#sp.fftPlot(tx_upsampled.real, tx_upsampled.imag, n=2)
#sp.fftPlot(tx_mixer.real, tx_mixer.imag, n=2)
#sp.fftPlot(tx_sig.real)
rx_mixer = rf.Mixer(tx_sig, -30 / 100, -1 * np.pi / 4)
b = signal.remez(100 + 1, [0, .1, 0.2, 0.5], [1, 1e-4])
def demod(input, modScheme, levels, encoding): if modScheme == MOD_SCHEME_PSK: return PSK.demod(input, levels, encoding) if modScheme == MOD_SCHEME_QAM: return QAM.demod(input, levels, encoding)
if i < size-1:
if array[i + 1][j] != None:
connectionsChecked += 1
diffs = compareStrings(array[i][j], array[i + 1][j])
if diffs != 1:
numberThatDoNoDifferByOneBit += 1
print "Number that do not differ by a single bit: {}".format(numberThatDoNoDifferByOneBit)
print "Number of connections checked: {}".format(connectionsChecked)
print "16 QAM Linear"
array = QAM.generateSquareMatrix(4, 0)
differByOneByOnly(array)
print "\n\n"
print "16 QAM Gray"
array = QAM.generateSquareMatrix(4, 1)
differByOneByOnly(array)
print "\n\n"
print "64 QAM Linear"
array = QAM.generateSquareMatrix(6, 0)
differByOneByOnly(array)
print "\n\n"
