wi-lab
/

lwm

@@ -1,295 +0,0 @@
-# -*- coding: utf-8 -*-
-"""
-Created on Fri Sep 13 16:13:29 2024
-This script generates preprocessed data from wireless communication scenarios,
-including token generation, patch creation, and data sampling for machine learning models.
-@author: salikha4
-"""
-import numpy as np
-import os
-from tqdm import tqdm
-import time
-import pickle
-import DeepMIMOv3
-#%% Scenarios List
-def scenarios_list():
-    """Returns an array of available scenarios."""
-    return np.array([
-        'city_18_denver', 'city_15_indianapolis', 'city_19_oklahoma',
-        'city_12_fortworth', 'city_11_santaclara', 'city_7_sandiego'
-    ])
-#%% Token Generation
-def tokenizer(scenario_names, gen_raw=True):
-    """
-    Generates tokens by preparing and preprocessing the dataset.
-    Args:
-        scenario_idxs (list): Indices of the scenarios.
-        patch_gen (bool): Whether to generate patches. Defaults to True.
-        patch_size (int): Size of each patch. Defaults to 16.
-        gen_deepMIMO_data (bool): Whether to generate DeepMIMO data. Defaults to False.
-        gen_raw (bool): Whether to generate raw data. Defaults to False.
-        save_data (bool): Whether to save the preprocessed data. Defaults to False.
-    Returns:
-        preprocessed_data, sequence_length, element_length: Preprocessed data and related dimensions.
-    """
-    # Patch generation or loading
-    deepmimo_data = [DeepMIMO_data_gen(scenario_name) for scenario_name in scenario_names]
-    n_scenarios = len(scenario_names)
-    patches = [patch_maker(deepmimo_data[scenario_idx]) for scenario_idx in range(n_scenarios)]
-    patches = np.vstack(patches)
-    # Define dimensions
-    patch_size = patches.shape[2]
-    n_patches = patches.shape[1]
-    n_masks_half = int(0.15 * n_patches / 2)
-    sequence_length = n_patches + 1
-    element_length = patch_size
-    word2id = {'[CLS]': 0.2 * np.ones((patch_size)), '[MASK]': 0.1 * np.ones((patch_size))}
-    # Generate preprocessed channels
-    preprocessed_data = []
-    for user_idx in tqdm(range(len(patches)), desc="Processing items"):
-        sample = make_sample(user_idx, patches, word2id, n_patches, n_masks_half, patch_size, gen_raw=gen_raw)
-        preprocessed_data.append(sample)
-    return preprocessed_data
-#%% Patch Creation
-def patch_maker(data, patch_size=16, norm_factor=1e6):
-    """
-    Creates patches from the dataset based on the scenario.
-    Args:-
-        patch_size (int): Size of each patch.
-        scenario (str): Selected scenario for data generation.
-        gen_deepMIMO_data (bool): Whether to generate DeepMIMO data.
-        norm_factor (int): Normalization factor for channels.
-    Returns:
-        patch (numpy array): Generated patches.
-    """
-    idxs = np.where(data['user']['LoS'] != -1)[0]
-    # Reshaping and normalizing channels
-    original_ch = data['user']['channel'][idxs]
-    flat_channels = original_ch.reshape((original_ch.shape[0], -1)).astype(np.csingle)
-    flat_channels_complex = np.hstack((flat_channels.real, flat_channels.imag)) * norm_factor
-    # Create patches
-    n_patches = flat_channels_complex.shape[1] // patch_size
-    patch = np.zeros((len(idxs), n_patches, patch_size))
-    for idx in range(n_patches):
-        patch[:, idx, :] = flat_channels_complex[:, idx * patch_size:(idx + 1) * patch_size]
-    return patch
-#%% Data Generation for Scenario Areas
-def DeepMIMO_data_gen(scenario):
-    """
-    Generates or loads data for a given scenario.
-    Args:
-        scenario (str): Scenario name.
-        gen_deepMIMO_data (bool): Whether to generate DeepMIMO data.
-        save_data (bool): Whether to save generated data.
-    Returns:
-        data (dict): Loaded or generated data.
-    """
-    parameters, row_column_users, n_ant_bs, n_ant_ue, n_subcarriers = get_parameters(scenario)
-    deepMIMO_dataset = DeepMIMOv3.generate_data(parameters)
-    uniform_idxs = uniform_sampling(deepMIMO_dataset, [1, 1], len(parameters['user_rows']),
-                                    users_per_row=row_column_users[scenario]['n_per_row'])
-    data = select_by_idx(deepMIMO_dataset, uniform_idxs)[0]
-    return data
-#%%%
-def get_parameters(scenario):
-    n_ant_bs = 32 #32
-    n_ant_ue = 1
-    n_subcarriers = 32 #32
-    scs = 30e3
-    row_column_users = {
-    'city_18_denver': {
-        'n_rows': 85,
-        'n_per_row': 82
-    },
-    'city_15_indianapolis': {
-        'n_rows': 80,
-        'n_per_row': 79
-    },
-    'city_19_oklahoma': {
-        'n_rows': 82,
-        'n_per_row': 75
-    },
-    'city_12_fortworth': {
-        'n_rows': 86,
-        'n_per_row': 72
-    },
-    'city_11_santaclara': {
-        'n_rows': 47,
-        'n_per_row': 114
-    },
-    'city_7_sandiego': {
-        'n_rows': 71,
-        'n_per_row': 83
-    }}
-    parameters = DeepMIMOv3.default_params()
-    parameters['dataset_folder'] = './scenarios'
-    parameters['scenario'] = scenario
-    if scenario == 'O1_3p5':
-        parameters['active_BS'] = np.array([4])
-    elif scenario in ['city_18_denver', 'city_15_indianapolis']:
-        parameters['active_BS'] = np.array([3])
-    else:
-        parameters['active_BS'] = np.array([1])
-    if scenario == 'Boston5G_3p5':
-        parameters['user_rows'] = np.arange(row_column_users[scenario]['n_rows'][0],
-                                            row_column_users[scenario]['n_rows'][1])
-    else:
-        parameters['user_rows'] = np.arange(row_column_users[scenario]['n_rows'])
-    parameters['bs_antenna']['shape'] = np.array([n_ant_bs, 1]) # Horizontal, Vertical
-    parameters['bs_antenna']['rotation'] = np.array([0,0,-135]) # (x,y,z)
-    parameters['ue_antenna']['shape'] = np.array([n_ant_ue, 1])
-    parameters['enable_BS2BS'] = False
-    parameters['OFDM']['subcarriers'] = n_subcarriers
-    parameters['OFDM']['selected_subcarriers'] = np.arange(n_subcarriers)
-    parameters['OFDM']['bandwidth'] = scs * n_subcarriers / 1e9
-    parameters['num_paths'] = 20
-    return parameters, row_column_users, n_ant_bs, n_ant_ue, n_subcarriers
-#%% Sample Generation
-def make_sample(user_idx, patch, word2id, n_patches, n_masks, patch_size, gen_raw=False):
-    """
-    Generates a sample for each user, including masking and tokenizing.
-    Args:
-        user_idx (int): Index of the user.
-        patch (numpy array): Patches data.
-        word2id (dict): Dictionary for special tokens.
-        n_patches (int): Number of patches.
-        n_masks (int): Number of masks.
-        patch_size (int): Size of each patch.
-        gen_raw (bool): Whether to generate raw tokens.
-    Returns:
-        sample (list): Generated sample for the user.
-    """
-    tokens = patch[user_idx]
-    input_ids = np.vstack((word2id['[CLS]'], tokens))
-    real_tokens_size = int(n_patches / 2)
-    masks_pos_real = np.random.choice(range(0, real_tokens_size), size=n_masks, replace=False)
-    masks_pos_imag = masks_pos_real + real_tokens_size
-    masked_pos = np.hstack((masks_pos_real, masks_pos_imag)) + 1
-    masked_tokens = []
-    for pos in masked_pos:
-        original_masked_tokens = input_ids[pos].copy()
-        masked_tokens.append(original_masked_tokens)
-        if not gen_raw:
-            rnd_num = np.random.rand()
-            if rnd_num < 0.1:
-                input_ids[pos] = np.random.rand(patch_size)
-            elif rnd_num < 0.9:
-                input_ids[pos] = word2id['[MASK]']
-    return [input_ids, masked_tokens, masked_pos]
-#%% Sampling and Data Selection
-def uniform_sampling(dataset, sampling_div, n_rows, users_per_row):
-    """
-    Performs uniform sampling on the dataset.
-    Args:
-        dataset (dict): DeepMIMO dataset.
-        sampling_div (list): Step sizes along [x, y] dimensions.
-        n_rows (int): Number of rows for user selection.
-        users_per_row (int): Number of users per row.
-    Returns:
-        uniform_idxs (numpy array): Indices of the selected samples.
-    """
-    cols = np.arange(users_per_row, step=sampling_div[0])
-    rows = np.arange(n_rows, step=sampling_div[1])
-    uniform_idxs = np.array([j + i * users_per_row for i in rows for j in cols])
-    return uniform_idxs
-def select_by_idx(dataset, idxs):
-    """
-    Selects a subset of the dataset based on the provided indices.
-    Args:
-        dataset (dict): Dataset to trim.
-        idxs (numpy array): Indices of users to select.
-    Returns:
-        dataset_t (list): Trimmed dataset based on selected indices.
-    """
-    dataset_t = []  # Trimmed dataset
-    for bs_idx in range(len(dataset)):
-        dataset_t.append({})
-        for key in dataset[bs_idx].keys():
-            dataset_t[bs_idx]['location'] = dataset[bs_idx]['location']
-            dataset_t[bs_idx]['user'] = {k: dataset[bs_idx]['user'][k][idxs] for k in dataset[bs_idx]['user']}
-    return dataset_t
-#%% Save and Load Utilities
-def save_var(var, path):
-    """
-    Saves a variable to a pickle file.
-    Args:
-        var (object): Variable to be saved.
-        path (str): Path to save the file.
-    Returns:
-        None
-    """
-    path_full = path if path.endswith('.p') else (path + '.pickle')
-    with open(path_full, 'wb') as handle:
-        pickle.dump(var, handle)
-def load_var(path):
-    """
-    Loads a variable from a pickle file.
-    Args:
-        path (str): Path of the file to load.
-    Returns:
-        var (object): Loaded variable.
-    """
-    path_full = path if path.endswith('.p') else (path + '.pickle')
-    with open(path_full, 'rb') as handle:
-        var = pickle.load(handle)
-    return var
-#%%