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-rw-r--r--dpd/src/Dab_Util.py82
-rw-r--r--dpd/src/Measure.py42
2 files changed, 66 insertions, 58 deletions
diff --git a/dpd/src/Dab_Util.py b/dpd/src/Dab_Util.py
index e0e8fcd..31366f5 100644
--- a/dpd/src/Dab_Util.py
+++ b/dpd/src/Dab_Util.py
@@ -62,19 +62,19 @@ class Dab_Util:
l_orig = float(l) / n_up
return l_orig
- def subsample_align_upsampling(self, sig1, sig2, n_up=32):
+ def subsample_align_upsampling(self, sig_tx, sig_rx, n_up=32):
"""
- Returns an aligned version of sig1 and sig2 by cropping and subsample alignment
+ Returns an aligned version of sig_tx and sig_rx by cropping and subsample alignment
Using upsampling
"""
- assert(sig1.shape[0] == sig2.shape[0])
+ assert(sig_tx.shape[0] == sig_rx.shape[0])
- if sig1.shape[0] % 2 == 1:
- sig1 = sig1[:-1]
- sig2 = sig2[:-1]
+ if sig_tx.shape[0] % 2 == 1:
+ sig_tx = sig_tx[:-1]
+ sig_rx = sig_rx[:-1]
- sig1_up = signal.resample(sig1, sig1.shape[0] * n_up)
- sig2_up = signal.resample(sig2, sig2.shape[0] * n_up)
+ sig1_up = signal.resample(sig_tx, sig_tx.shape[0] * n_up)
+ sig2_up = signal.resample(sig_rx, sig_rx.shape[0] * n_up)
off_meas = self.lag_upsampling(sig2_up, sig1_up, n_up=1)
off = int(abs(off_meas))
@@ -86,13 +86,13 @@ class Dab_Util:
sig1_up = sig1_up[off:]
sig2_up = sig2_up[:-off]
- sig1 = signal.resample(sig1_up, sig1_up.shape[0] / n_up).astype(np.complex64)
- sig2 = signal.resample(sig2_up, sig2_up.shape[0] / n_up).astype(np.complex64)
- return sig1, sig2
+ sig_tx = signal.resample(sig1_up, sig1_up.shape[0] / n_up).astype(np.complex64)
+ sig_rx = signal.resample(sig2_up, sig2_up.shape[0] / n_up).astype(np.complex64)
+ return sig_tx, sig_rx
- def subsample_align(self, sig1, sig2):
+ def subsample_align(self, sig_tx, sig_rx):
"""
- Returns an aligned version of sig1 and sig2 by cropping and subsample alignment
+ Returns an aligned version of sig_tx and sig_rx by cropping and subsample alignment
"""
if logging.getLogger().getEffectiveLevel() == logging.DEBUG:
@@ -100,15 +100,15 @@ class Dab_Util:
fig_path = logging_path + "/" + dt + "_sync_raw.pdf"
fig, axs = plt.subplots(2)
- axs[0].plot(np.abs(sig1[:128]), label="TX Frame")
- axs[0].plot(np.abs(sig2[:128]), label="RX Frame")
+ axs[0].plot(np.abs(sig_tx[:128]), label="TX Frame")
+ axs[0].plot(np.abs(sig_rx[:128]), label="RX Frame")
axs[0].set_title("Raw Data")
axs[0].set_ylabel("Amplitude")
axs[0].set_xlabel("Samples")
axs[0].legend(loc=4)
- axs[1].plot(np.real(sig1[:128]), label="TX Frame")
- axs[1].plot(np.real(sig2[:128]), label="RX Frame")
+ axs[1].plot(np.real(sig_tx[:128]), label="TX Frame")
+ axs[1].plot(np.real(sig_rx[:128]), label="RX Frame")
axs[1].set_title("Raw Data")
axs[1].set_ylabel("Real Part")
axs[1].set_xlabel("Samples")
@@ -118,35 +118,35 @@ class Dab_Util:
fig.savefig(fig_path)
fig.clf()
- logging.debug("Sig1_orig: %d %s, Sig2_orig: %d %s" % (len(sig1), sig1.dtype, len(sig2), sig2.dtype))
- off_meas = self.lag_upsampling(sig2, sig1, n_up=1)
+ logging.debug("Sig1_orig: %d %s, Sig2_orig: %d %s" % (len(sig_tx), sig_tx.dtype, len(sig_rx), sig_rx.dtype))
+ off_meas = self.lag_upsampling(sig_rx, sig_tx, n_up=1)
off = int(abs(off_meas))
if off_meas > 0:
- sig1 = sig1[:-off]
- sig2 = sig2[off:]
+ sig_tx = sig_tx[:-off]
+ sig_rx = sig_rx[off:]
elif off_meas < 0:
- sig1 = sig1[off:]
- sig2 = sig2[:-off]
+ sig_tx = sig_tx[off:]
+ sig_rx = sig_rx[:-off]
if off % 2 == 1:
- sig1 = sig1[:-1]
- sig2 = sig2[:-1]
+ sig_tx = sig_tx[:-1]
+ sig_rx = sig_rx[:-1]
if logging.getLogger().getEffectiveLevel() == logging.DEBUG:
dt = datetime.datetime.now().isoformat()
fig_path = logging_path + "/" + dt + "_sync_sample_aligned.pdf"
fig, axs = plt.subplots(2)
- axs[0].plot(np.abs(sig1[:128]), label="TX Frame")
- axs[0].plot(np.abs(sig2[:128]), label="RX Frame")
+ axs[0].plot(np.abs(sig_tx[:128]), label="TX Frame")
+ axs[0].plot(np.abs(sig_rx[:128]), label="RX Frame")
axs[0].set_title("Sample Aligned Data")
axs[0].set_ylabel("Amplitude")
axs[0].set_xlabel("Samples")
axs[0].legend(loc=4)
- axs[1].plot(np.real(sig1[:128]), label="TX Frame")
- axs[1].plot(np.real(sig2[:128]), label="RX Frame")
+ axs[1].plot(np.real(sig_tx[:128]), label="TX Frame")
+ axs[1].plot(np.real(sig_rx[:128]), label="RX Frame")
axs[1].set_ylabel("Real Part")
axs[1].set_xlabel("Samples")
axs[1].legend(loc=4)
@@ -156,22 +156,22 @@ class Dab_Util:
fig.clf()
- sig2 = sa.subsample_align(sig2, sig1)
+ sig_rx = sa.subsample_align(sig_rx, sig_tx)
if logging.getLogger().getEffectiveLevel() == logging.DEBUG:
dt = datetime.datetime.now().isoformat()
fig_path = logging_path + "/" + dt + "_sync_subsample_aligned.pdf"
fig, axs = plt.subplots(2)
- axs[0].plot(np.abs(sig1[:128]), label="TX Frame")
- axs[0].plot(np.abs(sig2[:128]), label="RX Frame")
+ axs[0].plot(np.abs(sig_tx[:128]), label="TX Frame")
+ axs[0].plot(np.abs(sig_rx[:128]), label="RX Frame")
axs[0].set_title("Subsample Aligned")
axs[0].set_ylabel("Amplitude")
axs[0].set_xlabel("Samples")
axs[0].legend(loc=4)
- axs[1].plot(np.real(sig1[:128]), label="TX Frame")
- axs[1].plot(np.real(sig2[:128]), label="RX Frame")
+ axs[1].plot(np.real(sig_tx[:128]), label="TX Frame")
+ axs[1].plot(np.real(sig_rx[:128]), label="RX Frame")
axs[1].set_ylabel("Real Part")
axs[1].set_xlabel("Samples")
axs[1].legend(loc=4)
@@ -180,22 +180,22 @@ class Dab_Util:
fig.savefig(fig_path)
fig.clf()
- sig2 = pa.phase_align(sig2, sig1)
+ sig_rx = pa.phase_align(sig_rx, sig_tx)
if logging.getLogger().getEffectiveLevel() == logging.DEBUG:
dt = datetime.datetime.now().isoformat()
fig_path = logging_path + "/" + dt + "_sync_phase_aligned.pdf"
fig, axs = plt.subplots(2)
- axs[0].plot(np.abs(sig1[:128]), label="TX Frame")
- axs[0].plot(np.abs(sig2[:128]), label="RX Frame")
+ axs[0].plot(np.abs(sig_tx[:128]), label="TX Frame")
+ axs[0].plot(np.abs(sig_rx[:128]), label="RX Frame")
axs[0].set_title("Phase Aligned")
axs[0].set_ylabel("Amplitude")
axs[0].set_xlabel("Samples")
axs[0].legend(loc=4)
- axs[1].plot(np.real(sig1[:128]), label="TX Frame")
- axs[1].plot(np.real(sig2[:128]), label="RX Frame")
+ axs[1].plot(np.real(sig_tx[:128]), label="TX Frame")
+ axs[1].plot(np.real(sig_rx[:128]), label="RX Frame")
axs[1].set_ylabel("Real Part")
axs[1].set_xlabel("Samples")
axs[1].legend(loc=4)
@@ -204,8 +204,8 @@ class Dab_Util:
fig.savefig(fig_path)
fig.clf()
- logging.debug("Sig1_cut: %d %s, Sig2_cut: %d %s, off: %d" % (len(sig1), sig1.dtype, len(sig2), sig2.dtype, off))
- return sig1, sig2
+ logging.debug("Sig1_cut: %d %s, Sig2_cut: %d %s, off: %d" % (len(sig_tx), sig_tx.dtype, len(sig_rx), sig_rx.dtype, off))
+ return sig_tx, sig_rx
def fromfile(self, filename, offset=0, length=None):
if length is None:
diff --git a/dpd/src/Measure.py b/dpd/src/Measure.py
index f48d28f..f6644bb 100644
--- a/dpd/src/Measure.py
+++ b/dpd/src/Measure.py
@@ -40,13 +40,7 @@ class Measure:
bufs.append(b)
return b''.join(bufs)
- def get_samples(self):
- """Connect to ODR-DabMod, retrieve TX and RX samples, load
- into numpy arrays, and return a tuple
- (tx_timestamp, tx_samples, rx_timestamp, rx_samples)
- where the timestamps are doubles, and the samples are numpy
- arrays of complex floats, both having the same size
- """
+ def receive_tcp(self):
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('localhost', self.port))
@@ -78,24 +72,38 @@ class Measure:
else:
rxframe = np.array([], dtype=np.complex64)
- # Normalize received signal with sent signal
- rx_median = np.median(np.abs(rxframe))
- rxframe = rxframe / rx_median * np.median(np.abs(txframe))
-
if logging.getLogger().getEffectiveLevel() == logging.DEBUG:
logging.debug("txframe: min %f, max %f, median %f" %
- (np.min(np.abs(txframe)),
- np.max(np.abs(txframe)),
- np.median(np.abs(txframe))))
+ (np.min(np.abs(txframe)),
+ np.max(np.abs(txframe)),
+ np.median(np.abs(txframe))))
logging.debug("rxframe: min %f, max %f, median %f" %
- (np.min(np.abs(rxframe)),
- np.max(np.abs(rxframe)),
- np.median(np.abs(rxframe))))
+ (np.min(np.abs(rxframe)),
+ np.max(np.abs(rxframe)),
+ np.median(np.abs(rxframe))))
logging.debug("Disconnecting")
s.close()
+ return txframe, tx_ts, rxframe, rx_ts
+
+
+ def get_samples(self):
+ """Connect to ODR-DabMod, retrieve TX and RX samples, load
+ into numpy arrays, and return a tuple
+ (tx_timestamp, tx_samples, rx_timestamp, rx_samples)
+ where the timestamps are doubles, and the samples are numpy
+ arrays of complex floats, both having the same size
+ """
+
+ txframe, tx_ts, rxframe, rx_ts = self.receive_tcp()
+ txframe_end = txframe[-100:]
+
+ # Normalize received signal with sent signal
+ rx_median = np.median(np.abs(rxframe))
+ rxframe = rxframe / rx_median * np.median(np.abs(txframe))
+
du = DU.Dab_Util(self.samplerate)
txframe_aligned, rxframe_aligned = du.subsample_align(txframe, rxframe)
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-21 19:54:14 +0000