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40kbps demo

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Roman Zeyde
2014-07-09 08:40:15 +03:00
parent 7da3ba122b
commit 2e4718e0fe
3 changed files with 4 additions and 4 deletions
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4
common.py
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@@ -7,8 +7,8 @@ log = logging.getLogger(__name__)
Fs = 32e3 Fs = 32e3
Ts = 1.0 / Fs Ts = 1.0 / Fs
frequencies = (np.arange(4) + 8) * 1e3 frequencies = (np.arange(10) + 1) * 1e3
carrier_index = len(frequencies)/2 carrier_index = 0
Fc = frequencies[carrier_index] Fc = frequencies[carrier_index]
Tc = 1.0 / Fc Tc = 1.0 / Fc

2
sigproc.py
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@@ -51,7 +51,7 @@ class QAM(object):
index = np.argmin(np.abs(s - self.points)) index = np.argmin(np.abs(s - self.points))
yield self._dec[ self.points[index] ] yield self._dec[ self.points[index] ]
modulator = QAM(bits_per_symbol=2, radii=[1.0]) modulator = QAM(bits_per_symbol=4, radii=[1.0, 0.6])
def clip(x, lims): def clip(x, lims):
return min(max(x, lims[0]), lims[1]) return min(max(x, lims[0]), lims[1])

2
test.sh
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@@ -3,7 +3,7 @@ set -u
set -x set -x
set -e set -e
dd if=/dev/urandom of=data.send bs=1024 count=8 dd if=/dev/urandom of=data.send bs=1024 count=64
python send.py python send.py
python recv.py python recv.py
python errors.py data.* #python show.py tx.int16 rx.int16 python errors.py data.* #python show.py tx.int16 rx.int16