diff options
Diffstat (limited to 'dpd/src/Const.py')
| -rw-r--r-- | dpd/src/Const.py | 81 |
1 files changed, 40 insertions, 41 deletions
diff --git a/dpd/src/Const.py b/dpd/src/Const.py index ebdfeb2..390dfbb 100644 --- a/dpd/src/Const.py +++ b/dpd/src/Const.py @@ -1,16 +1,21 @@ -# DAB Frame constants -# Sources: -# - etsi_EN_300_401_v010401p p145 -# - Measured with USRP B200 +# -*- coding: utf-8 -*- +# +# DPD Calculation Engine, constants +# +# 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 Const: def __init__(self, sample_rate, target_median, plot): + assert sample_rate == 8192000 # By now only constants for 8192000 self.sample_rate = sample_rate - self.tx_gain_max = 89 - + # DAB frame # Time domain self.T_F = sample_rate / 2048000 * 196608 # Transmission frame duration self.T_NULL = sample_rate / 2048000 * 2656 # Null symbol duration @@ -20,18 +25,10 @@ class Const: # Frequency Domain # example: np.delete(fft[3328:4865], 768) - self.FFT_delete = 768 self.FFT_delta = 1536 # Number of carrier frequencies - if sample_rate == 2048000: - self.FFT_start = 256 - self.FFT_end = 1793 - elif sample_rate == 8192000: - self.FFT_start = 3328 - self.FFT_end = 4865 - else: - raise RuntimeError("Sample Rate '{}' not supported".format( - sample_rate - )) + self.FFT_delete = 768 + self.FFT_start = 3328 + self.FFT_end = 4865 # Calculate sample offset from phase rotation # time per sample = 1 / sample_rate @@ -43,42 +40,44 @@ class Const: self.ES_plot = plot self.ES_start = 0.0 self.ES_end = 1.0 - self.ES_n_bins = 64 - self.ES_n_per_bin = 128 - - # Constants for TX_Agc - self.TAGC_max_txgain = 89 - self.TAGC_tx_median_target = target_median - self.TAGC_tx_median_max = self.TAGC_tx_median_target*1.4 - self.TAGC_tx_median_min = self.TAGC_tx_median_target/1.4 - - self.RAGC_min_rxgain = 25 - self.RAGC_rx_median_target = self.TAGC_tx_median_target - - # Constants for Model - self.MDL_plot = True or plot # Override default - - # Constants for MER - self.MER_plot = plot - - # Constants for Model_PM - self.MPM_tx_min = 0.1 + 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 - assert sample_rate==8192000 - meas_offset = 976 # Offset from center frequency to measure shoulder [kHz] - meas_width = 100 # Size of frequency delta to measure shoulder [kHz] + + 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_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 = True or plot # Override default + + # Constants for Model_PM + # Set all phase offsets to zero for TX amplitude < MPM_tx_min + self.MPM_tx_min = 0.1 + + # Constants for TX_Agc + self.TAGC_max_txgain = 89 # USRP specific + self.TAGC_tx_median_target = target_median + self.TAGC_tx_median_max = self.TAGC_tx_median_target * 1.4 + self.TAGC_tx_median_min = self.TAGC_tx_median_target / 1.4 + + # Constants for RX_AGC + self.RAGC_min_rxgain = 25 # USRP specific + self.RAGC_rx_median_target = self.TAGC_tx_median_target |