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Diffstat (limited to 'python/dpd/GlobalConfig.py')
| -rw-r--r-- | python/dpd/GlobalConfig.py | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/python/dpd/GlobalConfig.py b/python/dpd/GlobalConfig.py new file mode 100644 index 0000000..abd7442 --- /dev/null +++ b/python/dpd/GlobalConfig.py @@ -0,0 +1,103 @@ +# -*- coding: utf-8 -*- +# +# DPD Computation Engine, constants and global configuration +# +# Source for DAB standard: etsi_EN_300_401_v010401p p145 +# +# http://www.opendigitalradio.org +# Licence: The MIT License, see notice at the end of this file + +import numpy as np + +class GlobalConfig: + def __init__(self, args, plot_location: str): + self.sample_rate = args['samplerate'] + assert self.sample_rate == 8192000 # By now only constants for 8192000 + + self.plot_location = plot_location + plot = len(plot_location) > 0 + + # DAB frame + # Time domain + oversample = int(self.sample_rate / 2048000) + self.T_F = oversample * 196608 # Transmission frame duration + self.T_NULL = oversample * 2656 # Null symbol duration + self.T_S = oversample * 2552 # Duration of OFDM symbols of indices l = 1, 2, 3,... L; + self.T_U = oversample * 2048 # Inverse of carrier spacing + self.T_C = oversample * 504 # Duration of cyclic prefix + + # Frequency Domain + # example: np.delete(fft[3328:4865], 768) + self.FFT_delta = 1536 # Number of carrier frequencies + self.FFT_delete = 768 + self.FFT_start = 3328 + self.FFT_end = 4865 + + # Calculate sample offset from phase rotation + # time per sample = 1 / sample_rate + # frequency per bin = 1kHz + # phase difference per sample offset = delta_t * 2 * pi * delta_freq + self.phase_offset_per_sample = 1. / self.sample_rate * 2 * np.pi * 1000 + + # Constants for ExtractStatistic + self.ES_plot = plot + self.ES_start = 0.0 + self.ES_end = 1.0 + self.ES_n_bins = 64 # Number of bins between ES_start and ES_end + self.ES_n_per_bin = 128 # Number of measurements pre bin + + # Constants for Measure_Shoulder + self.MS_enable = False + self.MS_plot = plot + + meas_offset = 976 # Offset from center frequency to measure shoulder [kHz] + meas_width = 100 # Size of frequency delta to measure shoulder [kHz] + shoulder_offset_edge = np.abs(meas_offset - self.FFT_delta) + self.MS_shoulder_left_start = self.FFT_start - shoulder_offset_edge - meas_width / 2 + self.MS_shoulder_left_end = self.FFT_start - shoulder_offset_edge + meas_width / 2 + self.MS_shoulder_right_start = self.FFT_end + shoulder_offset_edge - meas_width / 2 + self.MS_shoulder_right_end = self.FFT_end + shoulder_offset_edge + meas_width / 2 + self.MS_peak_start = self.FFT_start + 100 # Ignore region near edges + self.MS_peak_end = self.FFT_end - 100 + + self.MS_FFT_size = 8192 + self.MS_averaging_size = 4 * self.MS_FFT_size + self.MS_n_averaging = 40 + self.MS_n_proc = 4 + + # Constants for MER + self.MER_plot = plot + + # Constants for Model + self.MDL_plot = plot + + # Constants for Model_PM + # Set all phase offsets to zero for TX amplitude < MPM_tx_min + self.MPM_tx_min = 0.1 + + # Constants for RX_AGC + self.RAGC_min_rxgain = 25 # USRP B200 specific + self.RAGC_rx_median_target = 0.05 + +# 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. |