Adding demodulator for ARGOS 4 PTT-VLD-A4 (A4-SS-TER-SP-0079-CNES)

ARGOS4VLDdemod/ByteSync.h

@@ -0,0 +1,4 @@
+#ifndef BYTESYNC_H
+#define BYTESYNC_H
+int FindSyncWords(unsigned char *bitStreamIn, double *bitStreamInTime, unsigned long nSamples,  char *syncWord, unsigned int syncWordLength, FILE *minorFrameFile);
+#endif

ARGOS4VLDdemod/RAW_Plotter.py

@@ -0,0 +1,48 @@
+# This code plots the 32-bit double data in the RAW
+# file produced by Nebarnix's ARGOS Demodulator
+
+import matplotlib
+import matplotlib.pyplot as plt
+import numpy as np
+import sys
+import struct
+
+y = []
+x = []
+count = 0
+numBytes = 8
+
+if (len(sys.argv) >= 3):
+    numBytes = int(sys.argv[2])
+
+if numBytes == 8:
+    dataType = 'd'
+if numBytes == 4:
+    dataType = 'f'
+
+with open(sys.argv[1], "rb") as reader:
+
+    reader.seek(0,2) #Jumps to the end
+    endLocation = reader.tell() #Give you the end location (characters from start)
+    reader.seek(0)   #Jump to the beginning of the file again
+
+    while True:
+        if numBytes == 1:
+            val = int.from_bytes(reader.read(numBytes), byteorder='little')
+        else:
+            val = struct.unpack(dataType,reader.read(numBytes))
+        y.append(val)
+        x.append(count)
+        count += 1
+        if reader.tell() == endLocation:
+            break
+
+fig, ax = plt.subplots()
+ax.plot(x, y, 'o-')
+
+ax.set(xlabel='sample', ylabel='signal',
+       title=sys.argv[1])
+ax.grid()
+
+#fig.savefig("test.png")
+plt.show()