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This commit is contained in:
Andreas Tsouchlos 2022-11-07 11:55:25 +01:00
parent 2c620a77df
commit cc855b8941
2 changed files with 5 additions and 6 deletions
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3
sw/decoders/__init__.py
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@ -1,2 +1 @@
"""This package contains a number of different decoder implementations for LDPC codes """This package contains a number of different decoder implementations for LDPC codes."""
"""

8
sw/decoders/utility.py
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@ -20,8 +20,8 @@ def _get_noise_amp_from_SNR(SNR: float, signal_amp: float = 1) -> float:
def add_awgn(c: np.array, SNR: float, signal_amp: float = 1) -> np.array: def add_awgn(c: np.array, SNR: float, signal_amp: float = 1) -> np.array:
"""Add Additive White Gaussian Noise to a data vector. As this function adds random noise to the input, """Add Additive White Gaussian Noise to a data vector. As this function adds random noise to
the output changes, even if it is called multiple times with the same input. the input, the output changes, even if it is called multiple times with the same input.
:param c: Binary vector representing the data to be transmitted :param c: Binary vector representing the data to be transmitted
:param SNR: Signal-to-Noise-Ratio in dB :param SNR: Signal-to-Noise-Ratio in dB
@ -78,8 +78,8 @@ def test_decoder(encoder: typing.Any,
leave=False, leave=False,
bar_format="{l_bar}{bar}| {n_fmt}/{total_fmt}"): bar_format="{l_bar}{bar}| {n_fmt}/{total_fmt}"):
# TODO: Is this a valid simulation? Can we just add AWGN to the codeword, ignoring and modulation and ( # TODO: Is this a valid simulation? Can we just add AWGN to the codeword,
# e.g. matched) filtering? # ignoring and modulation and (e.g. matched) filtering?
y = add_awgn(x, SNR, signal_amp=np.sqrt(2)) y = add_awgn(x, SNR, signal_amp=np.sqrt(2))
y_hat = decoder.decode(y) y_hat = decoder.decode(y)