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Diffstat (limited to 'python/dpd/src/Heuristics.py')
| -rw-r--r-- | python/dpd/src/Heuristics.py | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/python/dpd/src/Heuristics.py b/python/dpd/src/Heuristics.py new file mode 100644 index 0000000..21d400b --- /dev/null +++ b/python/dpd/src/Heuristics.py @@ -0,0 +1,56 @@ +# -*- coding: utf-8 -*- +# +# DPD Computation Engine, heuristics we use to tune the parameters. +# +# http://www.opendigitalradio.org +# Licence: The MIT License, see notice at the end of this file + +import numpy as np + + +def get_learning_rate(idx_run): + """Gradually reduce learning rate from lr_max to lr_min within + idx_max steps, then keep the learning rate at lr_min""" + idx_max = 10.0 + lr_min = 0.05 + lr_max = 0.4 + lr_delta = lr_max - lr_min + idx_run = min(idx_run, idx_max) + learning_rate = lr_max - lr_delta * idx_run / idx_max + return learning_rate + + +def get_n_meas(idx_run): + """Gradually increase number of measurements used to extract + a statistic from n_meas_min to n_meas_max within idx_max steps, + then keep number of measurements at n_meas_max""" + idx_max = 10.0 + n_meas_min = 10 + n_meas_max = 20 + n_meas_delta = n_meas_max - n_meas_min + idx_run = min(idx_run, idx_max) + learning_rate = n_meas_delta * idx_run / idx_max + n_meas_min + return int(np.round(learning_rate)) + +# The MIT License (MIT) +# +# Copyright (c) 2017 Andreas Steger +# Copyright (c) 2017 Matthias P. Braendli +# +# Permission is hereby granted, free of charge, to any person obtaining a copy +# of this software and associated documentation files (the "Software"), to deal +# in the Software without restriction, including without limitation the rights +# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +# copies of the Software, and to permit persons to whom the Software is +# furnished to do so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be included in all +# copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. |