QAM64 x 8 = 48kpbs!

common.py

@@ -7,7 +7,7 @@ log = logging.getLogger(__name__)
 Fs = 32e3
 Ts = 1.0 / Fs
 
-frequencies = (1 + np.arange(2)) * 1e3
+frequencies = (1 + np.arange(8)) * 1e3
 carrier_index = 0
 Fc = frequencies[carrier_index]
 Tc = 1.0 / Fc

recv.py

@@ -112,7 +112,6 @@ def demodulate(symbols, filters, freqs):
     symbol_list = []
 
     generators = split(symbols, n=len(freqs))
-    print filters
     for freq, S in zip(freqs, generators):
         S = filters[freq](S)
 

test.sh

@@ -2,7 +2,7 @@
 set -u 
 set -e 
 
-dd if=/dev/urandom of=data.send bs=1024 count=1 status=none
+dd if=/dev/urandom of=data.send bs=1024 count=16 status=none
 ./send.py tx.int16
 
 killall arecord aplay || true