Added channel impulse response. Try shifting the one around in the response in channel.py, it's pretty cool

channel.py

@@ -1,12 +1,14 @@
 import numpy as np
 
-channel_response = np.array([1, 0, 1 - 1j])
+channel_response = np.array([0, 0, 0, 1, 0, 0, 0])
 
 def sim(in_data):
     out_data = np.ndarray((len(in_data), len(in_data[0])), dtype=np.csingle)
 
     for i in range(len(in_data)):
-        convolved = np.convolve(channel_response, in_data[i])
-
+        convolved = np.convolve(channel_response, in_data[i], mode='same')
+        out_data[i] = convolved
+
+    return out_data
 
 

data.txt

@@ -1 +1,5 @@
 The quick brown fox jumped over the lazy dog.
+
+I can transmit arbitrary data as it stands, and it gets correctly decoded,
+obviously assuming there is no error. Adding and then correcting for that error
+is my next step.

main.py

@@ -54,11 +54,13 @@ if __name__ == '__main__':
 
     ofdm_time = np.fft.ifft(modulated)
 
-    ofdm_prefixed = cp_add(ofdm_time, 4)
+    tx = cp_add(ofdm_time, 4)
+
+    rx = channel.sim(tx)
 
     # Put the channel simulator stuff here
 
-    ofdm_cp_removed = cp_remove(ofdm_prefixed, 4)
+    ofdm_cp_removed = cp_remove(rx, 4)
 
     to_decode = np.fft.fft(ofdm_cp_removed)