diff --git a/threeGPPMultipathGenerator.py b/threeGPPMultipathGenerator.py
index 1d7425d..6879eb3 100644
--- a/threeGPPMultipathGenerator.py
+++ b/threeGPPMultipathGenerator.py
@@ -812,8 +812,8 @@ def displaceMultipathChannel(self, dataframe, deltaTxPos, deltaRxPos, deltaPos,
      
 
         ############################AOD#####################3
-        deltaNRxPos = deltaRxPos - deltaTxPos
-        deltaNTxPos = deltaTxPos - deltaRxPos
+        deltaNTxPos = deltaRxPos - deltaTxPos
+        deltaNRxPos = deltaTxPos - deltaRxPos
 
         phiAoD = np.array([[-np.sin(aod)],
                         [np.cos(aod)],