def testSdr():
sdr = rtlsdr.RtlSdr()
radioQ = Queue.Queue()
Qout = Queue.Queue()
initRtlSdr(sdr, 105.3e6, 2.4e5, 22)
getSamplesAsync(sdr, radioQ)
p = pyaudio.PyAudio()
play_t = threading.Thread(target=play_audio, args=(Qout, p, 48000.0))
play_t.start()
dem = Demodulator(2.4e5, 80000.0, 48000.0, 16000.0)
while (True):
data = radioQ.get()
audio = dem.fm_demodulate(data)
#spectrogram(audio)
Qout.put(audio)
def main():
fs_out = 44100.0
fs_in = fs_out #48000.0
channel = 432.079e6
sync_pulse = genSyncPulse2(4000, 1200,
t=.02) # make sure t*fs < chunk size (1024)
start_stop_pulse = genSyncPulse2(2400, 1200, t=.02)
radioQ = Queue.Queue()
Qin = Queue.Queue()
Qout = Queue.Queue()
sdr = rtlsdr.RtlSdr()
initRtlSdr(sdr, channel, 2.4e5, 32)
getSamplesAsync(sdr, radioQ)
tx_data = np.random.randint(0, 2, 1000)
transmission = np.append(
tx_intro(fs_out),
tx_fsk(tx_data, fs_out, 1200, 2400, 2, .01, 200, sync_pulse,
start_stop_pulse))
#transmission = tx_fsk(data, fs_out, 1200, 2400, 2, .005, 200, sync_pulse, start_stop_pulse)
p = pyaudio.PyAudio()
din, dout, dusbin, dusbout = audioDevNumbers(p)
tx_t = threading.Thread(target=play_audio, args=(Qout, p, fs_out, dusbout))
tx_t.start()
Qout.put(transmission)
play_t = threading.Thread(target=play_audio, args=(Qin, p, fs_in, dout))
play_t.start()
dem = Demodulator(2.4e5, 16000.0, fs_in, 4000.0)
dec = Decoder(1200, 2400, 2, .01, sync_pulse, start_stop_pulse, 200, fs_in)
data = radioQ.get()
audio = dem.fm_demodulate(data)
Qin.put(audio) # play the incomming signal
while (True):
rx_signal = radioQ.get()
audio = dem.fm_demodulate(rx_signal)
#audio *= 2
Qin.put(audio) # play the incomming signal
if (dec.process(audio)):
break
rx_data = dec.rec_data
print tx_data[:20]
print rx_data[:20]
print np.sum(np.equal(tx_data, rx_data)) / 1000
for i in range(400):
if (tx_data[i] != rx_data[i]):
print(i),
p.terminate()
sdr.close()
