diff options
Diffstat (limited to 'gnuradio-examples')
| -rw-r--r-- | gnuradio-examples/python/digital/simple_qam.py | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/gnuradio-examples/python/digital/simple_qam.py b/gnuradio-examples/python/digital/simple_qam.py index dee57baeb..947d7faad 100644 --- a/gnuradio-examples/python/digital/simple_qam.py +++ b/gnuradio-examples/python/digital/simple_qam.py @@ -2,18 +2,20 @@ from gnuradio import gr, blks2, packet_utils # Some constants -NOISE_VOLTAGE = 0 -FREQUENCY_OFFSET = 0 +NOISE_VOLTAGE = 0.1 +FREQUENCY_OFFSET = 0.0000 TIMING_OFFSET = 1.0 SAMPLES_PER_SYMBOL = 2 GAIN = 1.0 SW_DECIM = 1 BAND_MIDPOINT = 1.0 BAND_WIDTH = 0.5 +FREQ_ALPHA = 0.005 +EXCESS_BW = 0.35 # Modulation/Demodulation methods -modulator = blks2.qam_mod(4, SAMPLES_PER_SYMBOL) -demodulator = blks2.qam_demod(4, SAMPLES_PER_SYMBOL) +modulator = blks2.qam_mod(16, SAMPLES_PER_SYMBOL) +demodulator = blks2.qam_demod(16, SAMPLES_PER_SYMBOL, freq_alpha=FREQ_ALPHA) #Transmission Blocks packet_transmitter = blks2.mod_pkts(modulator, access_code=None, msgq_limit=4, @@ -41,6 +43,11 @@ sender = packet_transmitter.send_pkt # Some some packets (The second will not be recieved because it gets cut off # before it can finish. I think this occurs during modulation.) + +# Send some large messages to start off with to let things lock. +for i in range(0, int(20.0/SAMPLES_PER_SYMBOL)): + sender('a'*4000) + sender('hello1') sender('hello2') sender('hello3') @@ -48,6 +55,11 @@ sender('hello4') sender('hello5') sender('hello6') sender('hello7') +sender('hello8') +sender('hello9') +sender('hello10') +sender('hello11') +sender('hello12') sender('world') sender(eof=True) |