| # SPDX-License-Identifier: MPL-2.0 |
| # Copyright (c) 2022 Philipp Le <philipp@philipple.de>. |
| # This Source Code Form is subject to the terms of the Mozilla Public |
| # License, v. 2.0. If a copy of the MPL was not distributed with this |
| # file, You can obtain one at https://mozilla.org/MPL/2.0/. |
| |
| from __future__ import annotations |
| |
| from tkinter import ttk, LEFT, BOTH, BOTTOM |
| from pydantic import confloat |
| from dcs.config import default_store, ConfigObject, ui_create, ConfigControlFrame |
| import numpy as np |
| import scipy.signal |
| from dcs.frames.base import BaseFrame, Window |
| from dcs.frames.groups import Ch06Group |
| from dcs.utils import swap_freq, abs_log_fft |
| from typing import List |
| from enum import Enum |
| |
| import matplotlib |
| matplotlib.use('TkAgg') |
| from matplotlib.figure import Figure |
| from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2Tk |
| |
| |
| SAMPLE_LEN = 512 |
| FFT_OVERSAMPLING = 64 |
| |
| |
| @ui_create |
| class Function(ConfigObject): |
| freq: confloat(ge=-16*SAMPLE_LEN, lt=16*SAMPLE_LEN, multiple_of=(4.0/FFT_OVERSAMPLING)) = 1.0 |
| amplitude_dB: confloat(ge=-100.0, lt=10.0, multiple_of=1) = 0.0 |
| phase: confloat(ge=-180.0, le=180.0, multiple_of=0.1) = 0.0 |
| offset: confloat(ge=-5.0, lt=5.0, multiple_of=0.01) = 0.0 |
| |
| def make_config_widget(self, parent: ttk.Widget) -> ConfigControlFrame: |
| frm = ConfigControlFrame(parent) |
| |
| ttk.Label(frm, text='Frequency:').grid(row=0, column=0) |
| w = self.ui_create_freq(frm) |
| frm.add_widget(w) |
| w.grid(row=0, column=1) |
| |
| ttk.Label(frm, text='Amplitude:').grid(row=1, column=0) |
| w = self.ui_create_amplitude_dB(frm) |
| frm.add_widget(w) |
| w.grid(row=1, column=1) |
| ttk.Label(frm, text='dB').grid(row=1, column=2) |
| |
| ttk.Label(frm, text='Phase:').grid(row=2, column=0) |
| w = self.ui_create_phase(frm) |
| frm.add_widget(w) |
| w.grid(row=2, column=1) |
| ttk.Label(frm, text='°').grid(row=2, column=2) |
| |
| ttk.Label(frm, text='Offset:').grid(row=3, column=0) |
| w = self.ui_create_offset(frm) |
| frm.add_widget(w) |
| w.grid(row=3, column=1) |
| |
| return frm |
| |
| def calc_signal(self, t: np.ndarray) -> np.ndarray: |
| phasor = np.power(10, self.amplitude_dB / 20) * np.exp(1j * self.phase * np.pi / 180) |
| phi = np.exp(1j * 2 * np.pi * self.freq * t) |
| return self.offset + (phasor * phi) |
| |
| def make_title(self): |
| return f'f={self.freq}, {self.amplitude_dB} dB, {self.phase}°' |
| |
| |
| class Direction(str, Enum): |
| UP = 'Up Conversion' |
| DOWN = 'Down Conversion' |
| |
| |
| @ui_create |
| class ConfigCh06Mixer(ConfigObject): |
| _KEY = 'ch06_mixer' |
| |
| input_funcs: List[Function] = [ |
| Function(freq=-1.0, amplitude_dB=0.0, phase=0.0), |
| Function(freq=2.0, amplitude_dB=0.0, phase=90.0), |
| ] |
| direction: Direction = Direction.UP |
| nco: Function = Function(freq=20.0, amplitude_dB=0.0) |
| |
| def make_config_widget(self, parent: ttk.Widget) -> ConfigControlFrame: |
| frm = ConfigControlFrame(parent, borderwidth=1, relief='raised') |
| |
| ttk.Label(frm, text='Input Functions:').pack() |
| w = self.ui_create_input_funcs_list(frm, lambda e: e.make_title()) |
| frm.add_widget(w) |
| w.pack() |
| |
| frm1 = ttk.Frame(frm) |
| frm1.pack() |
| ttk.Label(frm1, text='Conversion Direction:').grid(row=0, column=0) |
| w = self.ui_create_direction_dropdown(frm1) |
| frm.add_widget(w) |
| w.grid(row=0, column=1) |
| |
| frm2 = ttk.Frame(frm, borderwidth=1, relief='raised') |
| frm2.pack() |
| ttk.Label(frm2, text='Carrier:').pack() |
| carrier_frm = self.nco.make_config_widget(frm2) |
| for w in carrier_frm.ctrl_widgets: |
| frm.add_widget(w) |
| carrier_frm.pack() |
| |
| return frm |
| |
| def calc_oscillator_signal(self, t: np.ndarray) -> np.ndarray: |
| if self.direction == Direction.UP: |
| return self.nco.calc_signal(t) |
| elif self.direction == Direction.DOWN: |
| return np.conjugate(self.nco.calc_signal(t)) |
| else: |
| raise Exception('Invalid direction') |
| |
| def calc_input_signal(self, t: np.ndarray) -> np.ndarray: |
| x = np.zeros((len(self.input_funcs), len(t)), dtype='complex128') |
| for index, func in enumerate(self.input_funcs): |
| x[index, :] = func.calc_signal(t) |
| return np.sum(x, axis=0) |
| |
| def calc_output_signal(self, t: np.ndarray) -> np.ndarray: |
| inp = self.calc_input_signal(t) |
| carrier = self.calc_oscillator_signal(t) |
| re_mixed = (np.real(inp) * np.real(carrier)) - (np.imag(inp) * np.imag(carrier)) |
| im_mixed = (np.imag(inp) * np.real(carrier)) + (np.real(inp) * np.imag(carrier)) |
| return re_mixed + (1j * im_mixed) |
| |
| |
| class Ch06MixerFrame(BaseFrame): |
| def __init__(self, *args, **kwargs): |
| super().__init__(*args, **kwargs) |
| |
| self._config: ConfigCh06Mixer = default_store().get_config(ConfigCh06Mixer) |
| |
| ctrl_frm = self._create_control() |
| ctrl_frm.pack(side=LEFT) |
| |
| signal_frm = self._create_signal_tabs() |
| signal_frm.pack(expand=True, fill=BOTH) |
| |
| def _create_control(self) -> ConfigControlFrame: |
| frm = self._config.make_config_widget(self) |
| frm.widgets_on_change(self._on_change) |
| return frm |
| |
| def _on_change(self, _, __, ___): |
| default_store().save() |
| self.draw_td() |
| self.draw_fd() |
| |
| def _create_signal_tabs(self) -> ttk.Widget: |
| tabs = ttk.Notebook(self) |
| |
| td_frm = ttk.Frame(tabs) |
| tabs.add(td_frm, text='Time Domain') |
| self._td_fig = Figure(figsize=(12, 6), dpi=100) |
| self._td_canvas = FigureCanvasTkAgg(self._td_fig, td_frm) |
| self._td_canvas.get_tk_widget().pack(expand=True, fill=BOTH) |
| td_tb = NavigationToolbar2Tk(self._td_canvas, td_frm, pack_toolbar=False) |
| td_tb.pack(side=BOTTOM) |
| |
| fd_frm = ttk.Frame(tabs) |
| tabs.add(fd_frm, text='Frequency Domain') |
| self._fd_fig = Figure(figsize=(12, 6), dpi=100) |
| self._fd_canvas = FigureCanvasTkAgg(self._fd_fig, fd_frm) |
| self._fd_canvas.get_tk_widget().pack(expand=True, fill=BOTH) |
| fd_tb = NavigationToolbar2Tk(self._fd_canvas, fd_frm, pack_toolbar=False) |
| fd_tb.pack(side=BOTTOM) |
| |
| self.draw_td() |
| self.draw_fd() |
| |
| return tabs |
| |
| def draw_td(self): |
| self._td_fig.clear() |
| |
| ax_inp = self._td_fig.add_subplot(3, 1, 1) |
| ax_inp.set_xlim(0.0, 1.0) |
| ax_inp.set_xlabel('time') |
| ax_inp.set_ylabel('value') |
| ax_inp.set_title('Input Signal') |
| ax_nco = self._td_fig.add_subplot(3, 1, 2) |
| ax_nco.set_xlim(0.0, 1.0) |
| ax_nco.set_xlabel('time') |
| ax_nco.set_ylabel('value') |
| ax_nco.set_title('Numerically-Controlled Oscillator Signal') |
| ax_out = self._td_fig.add_subplot(3, 1, 3) |
| ax_out.set_xlim(0.0, 1.0) |
| ax_out.set_xlabel('time') |
| ax_out.set_ylabel('value') |
| ax_out.set_title('Output Signal') |
| |
| t = np.arange(0, SAMPLE_LEN, 1) / SAMPLE_LEN |
| |
| x_inp = self._config.calc_input_signal(t) |
| ax_inp.plot(t, np.real(x_inp), label='Input Re (I)', linestyle='solid', color='blue', linewidth=1) |
| ax_inp.plot(t, np.imag(x_inp), label='Input Im (Q)', linestyle='solid', color='red', linewidth=1) |
| ax_inp.legend() |
| |
| x_nco = self._config.calc_oscillator_signal(t) |
| ax_nco.plot(t, np.real(x_nco), label='NCO Re (I)', linestyle='solid', color='green', linewidth=1) |
| ax_nco.plot(t, np.imag(x_nco), label='NCO Im (Q)', linestyle='solid', color='orange', linewidth=1) |
| ax_nco.legend() |
| |
| x_out = self._config.calc_output_signal(t) |
| ax_out.plot(t, np.real(x_out), label='Output Re (I)', linestyle='solid', color='blue', linewidth=1) |
| ax_out.plot(t, np.imag(x_out), label='Output Im (Q)', linestyle='solid', color='red', linewidth=1) |
| ax_out.legend() |
| |
| self._td_fig.tight_layout() |
| self._td_canvas.draw() |
| |
| @classmethod |
| def _log_real(cls, x: np.ndarray) -> np.ndarray: |
| return np.real(x) |
| |
| @classmethod |
| def _log_imag(cls, x: np.ndarray) -> np.ndarray: |
| return np.imag(x) |
| |
| @classmethod |
| def _log_abs(cls, x: np.ndarray) -> np.ndarray: |
| return np.abs(x) |
| |
| def draw_fd(self): |
| self._fd_fig.clear() |
| |
| ax_inp = self._fd_fig.add_subplot(2, 1, 1) |
| ax_inp.set_xlim(-int(SAMPLE_LEN/2), int(SAMPLE_LEN/2)) |
| ax_inp.set_xlabel('frequency') |
| ax_inp.set_ylabel('value (dB)') |
| ax_inp.set_title('Input Signals') |
| ax_out = self._fd_fig.add_subplot(2, 1, 2) |
| ax_out.set_xlim(-int(SAMPLE_LEN/2), int(SAMPLE_LEN/2)) |
| ax_out.set_xlabel('frequency') |
| ax_out.set_ylabel('value (dB)') |
| ax_out.set_title('Output Signal') |
| |
| t_ovs = np.arange(0, (SAMPLE_LEN * FFT_OVERSAMPLING), 1) / SAMPLE_LEN |
| f_ovs = swap_freq(np.fft.fftfreq(t_ovs.shape[-1], 1.0/SAMPLE_LEN)) |
| |
| x_inp = self._config.calc_input_signal(t_ovs) |
| x_nco = self._config.calc_oscillator_signal(t_ovs) |
| ax_inp.plot(f_ovs, abs_log_fft(x_inp), label='Input', linestyle='solid', color='blue', linewidth=1) |
| ax_inp.plot(f_ovs, abs_log_fft(x_nco), label='NCO', linestyle='solid', color='green', linewidth=1) |
| ax_inp.legend() |
| |
| x_out = self._config.calc_output_signal(t_ovs) |
| ax_out.plot(f_ovs, abs_log_fft(x_out), label='Output', linestyle='solid', color='brown', linewidth=1) |
| ax_out.legend() |
| |
| self._fd_fig.tight_layout() |
| self._fd_canvas.draw() |
| |
| |
| class Ch06MixerWindow(Window): |
| GROUP = Ch06Group |
| TITLE = 'Digital Mixer' |
| FRAME = Ch06MixerFrame |
| |
| |
| if __name__ == '__main__': |
| Ch06MixerWindow.main() |
| |