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Now proximaldecoder is returning 'None' on decoding failure

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This commit is contained in:
Andreas Tsouchlos 2022-11-23 17:45:17 +01:00
parent d6ce89cbeb
commit 86de1638b5
1 changed files with 6 additions and 5 deletions
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11
sw/decoders/proximal.py
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@ -7,7 +7,7 @@ class ProximalDecoder:
by Tadashi Wadayama, and Satoshi Takabe. by Tadashi Wadayama, and Satoshi Takabe.
""" """
def __init__(self, H: np.array, K: int = 100, omega: float = 0.1, def __init__(self, H: np.array, K: int = 1000, omega: float = 0.0002,
gamma: float = 0.05, eta: float = 1.5): gamma: float = 0.05, eta: float = 1.5):
"""Construct a new ProximalDecoder Object. """Construct a new ProximalDecoder Object.
@ -75,7 +75,8 @@ class ProximalDecoder:
:param y: Vector of received values. (y = x + w, where 'x' is :param y: Vector of received values. (y = x + w, where 'x' is
element of [-1, 1]^n and 'w' is noise) element of [-1, 1]^n and 'w' is noise)
:return: Most probably sent codeword (element of [0, 1]^n) :return: Most probably sent codeword (element of [0, 1]^n). If
decoding fails, the returned value is 'None'
""" """
s = np.zeros(self._n) s = np.zeros(self._n)
x_hat = np.zeros(self._n) x_hat = np.zeros(self._n)
@ -86,11 +87,11 @@ class ProximalDecoder:
s = self._projection(s) # Equation (15) s = self._projection(s) # Equation (15)
x_hat = np.sign(s) x_hat = np.sign(s)
# Map the codeword from [ -1, 1]^n to [0, 1]^n # Map the codeword from [ -1, 1]^n to [0, 1]^n
x_hat = (x_hat == -1) * 1 x_hat = (x_hat == -1) * 1
if self._check_parity(x_hat): if self._check_parity(x_hat):
break return x_hat
return x_hat return None