From 253be52c23528544d54a59b649a60193fffb2848 Mon Sep 17 00:00:00 2001
From: andreas128 <Andreas>
Date: Thu, 28 Sep 2017 18:59:35 +0200
Subject: Cleanup

---
 dpd/src/Const.py | 81 ++++++++++++++++++++++++++++----------------------------
 1 file changed, 40 insertions(+), 41 deletions(-)

(limited to 'dpd/src/Const.py')

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
-- 
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