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Diffstat (limited to 'gnuradio-examples/python/digital/simple_qam.py')
-rw-r--r-- | gnuradio-examples/python/digital/simple_qam.py | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/gnuradio-examples/python/digital/simple_qam.py b/gnuradio-examples/python/digital/simple_qam.py deleted file mode 100644 index 947d7faad..000000000 --- a/gnuradio-examples/python/digital/simple_qam.py +++ /dev/null @@ -1,76 +0,0 @@ - -from gnuradio import gr, blks2, packet_utils - -# Some constants -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(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, - pad_for_usrp=True) -# Channel -channel = gr.channel_model(NOISE_VOLTAGE, FREQUENCY_OFFSET, TIMING_OFFSET) -# Receiver Blocks -chan_coeffs = gr.firdes.low_pass(GAIN, SW_DECIM * SAMPLES_PER_SYMBOL, - BAND_MIDPOINT, BAND_WIDTH, gr.firdes.WIN_HANN) -channel_filter = gr.fft_filter_ccc(SW_DECIM, chan_coeffs) -packet_receiver = blks2.demod_pkts(demodulator, access_code=None, callback=None, - threshold=-1) -# Put it all together and start it up (although nothing will be done -# until we send some packets). -tb = gr.top_block() -tb.connect(packet_transmitter, channel, channel_filter, - packet_receiver) -tb.start() - -# The queue into which recieved packets are placed -pkq = packet_receiver._rcvd_pktq - -# The function to create a packet and place it in a queue to be sent. -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') -sender('hello4') -sender('hello5') -sender('hello6') -sender('hello7') -sender('hello8') -sender('hello9') -sender('hello10') -sender('hello11') -sender('hello12') -sender('world') -sender(eof=True) - -# Wait for all the packets to get sent and received. -tb.wait() - -# Check how many messages have been received and print them. -cnt = pkq.count() -print('There are %s messages' % cnt) -for a in range(0, cnt): - msg = pkq.delete_head() - ok, payload = packet_utils.unmake_packet(msg.to_string(), int(msg.arg1())) - print("Message %s is %s" % (a, payload)) - |