diff --git a/pyphysim/modulators/fundamental.py b/pyphysim/modulators/fundamental.py
index 32162d0..32193fc 100644
--- a/pyphysim/modulators/fundamental.py
+++ b/pyphysim/modulators/fundamental.py
@@ -644,7 +644,7 @@ def demodulate(self, receivedData: np.ndarray) -> np.ndarray:
             The demodulated data.
         """
         # noinspection PyUnresolvedReferences
-        return (receivedData < 0).astype(int)
+        return [int(i > 0) for i in receivedData]
 
 
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