From 73ff6e87fac98783b9d83864d8fed70fedb8afcd Mon Sep 17 00:00:00 2001
From: Nao Pross <np@0hm.ch>
Date: Sat, 11 Dec 2021 19:02:25 +0100
Subject: Create flowgraph for QAM simulation

---
 flowgraphs/qam_sim.grc | 932 +++++++++++++++++++++++++++++++++++++++++++++++++
 flowgraphs/qam_sim.py  | 352 +++++++++++++++++++
 2 files changed, 1284 insertions(+)
 create mode 100644 flowgraphs/qam_sim.grc
 create mode 100755 flowgraphs/qam_sim.py

(limited to 'flowgraphs')

diff --git a/flowgraphs/qam_sim.grc b/flowgraphs/qam_sim.grc
new file mode 100644
index 0000000..c5f407b
--- /dev/null
+++ b/flowgraphs/qam_sim.grc
@@ -0,0 +1,932 @@
+options:
+  parameters:
+    author: Naoki Sean Pross, Sara Cinzia Halter
+    category: '[GRC Hier Blocks]'
+    cmake_opt: ''
+    comment: ''
+    copyright: ''
+    description: ''
+    gen_cmake: 'On'
+    gen_linking: dynamic
+    generate_options: qt_gui
+    hier_block_src_path: '.:'
+    id: qam_sim
+    max_nouts: '0'
+    output_language: python
+    placement: (0,0)
+    qt_qss_theme: ''
+    realtime_scheduling: '1'
+    run: 'True'
+    run_command: '{python} -u {filename}'
+    run_options: run
+    sizing_mode: fixed
+    thread_safe_setters: ''
+    title: QAM Sim
+    window_size: ''
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [24, 12.0]
+    rotation: 0
+    state: enabled
+
+blocks:
+- name: access_code_symbols
+  id: variable
+  parameters:
+    comment: ''
+    value: '[(-0.31622776601683794-0.31622776601683794j), (-0.31622776601683794+0.31622776601683794j),
+      (-0.9486832980505138-0.9486832980505138j), (-0.9486832980505138-0.31622776601683794j)]'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [792, 1092.0]
+    rotation: 0
+    state: true
+- name: carrier_freq
+  id: variable
+  parameters:
+    comment: ''
+    value: 2.4e9
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [472, 572.0]
+    rotation: 0
+    state: true
+- name: excess_bw
+  id: variable
+  parameters:
+    comment: ''
+    value: '0.35'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [336, 1156.0]
+    rotation: 0
+    state: true
+- name: frame
+  id: fadingui_frame_obj
+  parameters:
+    alias: ''
+    comment: ''
+    payload_len: '4096'
+    preamble: '[0xbe, 0xef]'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [48, 612.0]
+    rotation: 0
+    state: disabled
+- name: frame_len
+  id: variable
+  parameters:
+    comment: ''
+    value: len(testvec) +4
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [184, 252.0]
+    rotation: 0
+    state: true
+- name: nfilts
+  id: variable
+  parameters:
+    comment: ''
+    value: '32'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [256, 1156.0]
+    rotation: 0
+    state: true
+- name: qam_const
+  id: variable_constellation
+  parameters:
+    comment: ''
+    const_points: '[-1-1j, -1+1j, 1+1j, 1-1j]'
+    dims: '1'
+    precision: '8'
+    rot_sym: '4'
+    soft_dec_lut: None
+    sym_map: '[0, 1, 3, 2]'
+    type: 16qam
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [472, 356.0]
+    rotation: 0
+    state: true
+- name: rrc_taps
+  id: variable
+  parameters:
+    comment: ''
+    value: firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(sps), excess_bw, 45*nfilts)
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [432, 1156.0]
+    rotation: 0
+    state: true
+- name: samp_rate
+  id: variable
+  parameters:
+    comment: ''
+    value: 1e6
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [24, 148.0]
+    rotation: 0
+    state: enabled
+- name: sps
+  id: variable
+  parameters:
+    comment: ''
+    value: '4'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [144, 148.0]
+    rotation: 0
+    state: true
+- name: testvec
+  id: variable
+  parameters:
+    comment: ''
+    value: '[0x1f, 0x35] + [0x12, 0x48] '
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [48, 252.0]
+    rotation: 0
+    state: true
+- name: analog_random_source_x_0
+  id: analog_random_source_x
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    max: '255'
+    maxoutbuf: '0'
+    min: '0'
+    minoutbuf: '0'
+    num_samps: '400'
+    repeat: 'True'
+    type: byte
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [48, 420.0]
+    rotation: 0
+    state: true
+- name: blocks_complex_to_mag_0
+  id: blocks_complex_to_mag
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1088, 1080.0]
+    rotation: 0
+    state: true
+- name: blocks_null_source_0
+  id: blocks_null_source
+  parameters:
+    affinity: ''
+    alias: ''
+    bus_structure_source: '[[0,],]'
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    num_outputs: '1'
+    type: byte
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [48, 528.0]
+    rotation: 0
+    state: true
+- name: blocks_repack_bits_bb_0
+  id: blocks_repack_bits_bb
+  parameters:
+    affinity: ''
+    alias: ''
+    align_output: 'False'
+    comment: ''
+    endianness: gr.GR_LSB_FIRST
+    k: '2'
+    l: '8'
+    len_tag_key: '""'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [768, 1300.0]
+    rotation: 0
+    state: true
+- name: blocks_stream_mux_0
+  id: blocks_stream_mux
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    lengths: '[len(testvec), 4, 0]'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    num_inputs: '3'
+    type: byte
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [272, 416.0]
+    rotation: 0
+    state: true
+- name: blocks_stream_to_vector_0
+  id: blocks_stream_to_vector
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    num_items: frame_len
+    type: byte
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [992, 1312.0]
+    rotation: 0
+    state: true
+- name: blocks_tagged_stream_align_0
+  id: blocks_tagged_stream_align
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    lengthtagname: frame_start
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    type: byte
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [496, 1308.0]
+    rotation: 0
+    state: true
+- name: blocks_throttle_0
+  id: blocks_throttle
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    ignoretag: 'True'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    samples_per_second: samp_rate
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [744, 444.0]
+    rotation: 0
+    state: true
+- name: blocks_vector_source_x_0
+  id: blocks_vector_source_x
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    repeat: 'True'
+    tags: '[]'
+    type: byte
+    vector: testvec
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [48, 324.0]
+    rotation: 0
+    state: true
+- name: channels_channel_model_0
+  id: channels_channel_model
+  parameters:
+    affinity: ''
+    alias: ''
+    block_tags: 'False'
+    comment: ''
+    epsilon: '1.0'
+    freq_offset: '0'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    noise_voltage: 100e-3
+    seed: '243'
+    taps: np.exp(1j * 30 / 180 * np.pi)
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [312, 716.0]
+    rotation: 0
+    state: enabled
+- name: channels_selective_fading_model_0
+  id: channels_selective_fading_model
+  parameters:
+    K: '4.0'
+    LOS: 'False'
+    N: '8'
+    affinity: ''
+    alias: ''
+    comment: ''
+    delays: (0,1.8)
+    fDTs: ((4*carrier_freq)/(3*10e8))/samp_rate
+    mags: (1,0.12)
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    ntaps: '8'
+    seed: '21'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [600, 572.0]
+    rotation: 0
+    state: disabled
+- name: digital_constellation_decoder_cb_0
+  id: digital_constellation_decoder_cb
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    constellation: qam_const
+    maxoutbuf: '0'
+    minoutbuf: '0'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [256, 1308.0]
+    rotation: 0
+    state: true
+- name: digital_constellation_modulator_0
+  id: digital_constellation_modulator
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    constellation: qam_const
+    differential: 'False'
+    excess_bw: excess_bw
+    log: 'False'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    samples_per_symbol: sps
+    verbose: 'False'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [472, 420.0]
+    rotation: 0
+    state: true
+- name: digital_corr_est_cc_0
+  id: digital_corr_est_cc
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    mark_delay: len(access_code_symbols) // 2
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    sps: '1'
+    symbols: access_code_symbols
+    threshold: '0.9'
+    threshold_method: digital.THRESHOLD_ABSOLUTE
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [792, 972.0]
+    rotation: 0
+    state: true
+- name: digital_lms_dd_equalizer_cc_0
+  id: digital_lms_dd_equalizer_cc
+  parameters:
+    affinity: ''
+    alias: ''
+    cnst: qam_const
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    mu: 5e-3
+    num_taps: '2'
+    sps: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [520, 980.0]
+    rotation: 0
+    state: true
+- name: digital_pfb_clock_sync_xxx_0
+  id: digital_pfb_clock_sync_xxx
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    filter_size: '32'
+    init_phase: '16'
+    loop_bw: 2 * np.pi / 100
+    max_dev: '1.5'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    osps: '1'
+    sps: sps
+    taps: rrc_taps
+    type: ccf
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [248, 1004.0]
+    rotation: 0
+    state: true
+- name: fadingui_ber_0
+  id: fadingui_ber
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    vgl: testvec + list(np.zeros(4))
+    vlen: frame_len
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1184, 1300.0]
+    rotation: 0
+    state: true
+- name: fadingui_datasource_0
+  id: fadingui_datasource
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    fname: ''
+    frame_obj: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [208, 612.0]
+    rotation: 0
+    state: disabled
+- name: fadingui_multipath_fading_0
+  id: fadingui_multipath_fading
+  parameters:
+    affinity: ''
+    alias: ''
+    amplitudes: '[0.12]'
+    comment: ''
+    delays: '[1.8]'
+    los: 'True'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [648, 740.0]
+    rotation: 0
+    state: enabled
+- name: fadingui_netsink_0
+  id: fadingui_netsink
+  parameters:
+    address: udp://localhost:31415
+    affinity: ''
+    alias: ''
+    comment: ''
+    type: complex
+    veclen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [704, 316.0]
+    rotation: 0
+    state: disabled
+- name: fadingui_netsink_1
+  id: fadingui_netsink
+  parameters:
+    address: udp://localhost:31415
+    affinity: ''
+    alias: ''
+    comment: ''
+    type: complex
+    veclen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [768, 916.0]
+    rotation: 0
+    state: disabled
+- name: fadingui_netsink_3
+  id: fadingui_netsink
+  parameters:
+    address: udp://localhost:31415
+    affinity: ''
+    alias: ''
+    comment: ''
+    type: complex
+    veclen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1280, 916.0]
+    rotation: 0
+    state: disabled
+- name: fadingui_netsink_4
+  id: fadingui_netsink
+  parameters:
+    address: udp://localhost:31415
+    affinity: ''
+    alias: ''
+    comment: ''
+    type: complex
+    veclen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [528, 916.0]
+    rotation: 0
+    state: disabled
+- name: fadingui_phasecorrection_0
+  id: fadingui_phasecorrection
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    frame_len: frame_len
+    maxoutbuf: '0'
+    minoutbuf: '0'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1032, 988.0]
+    rotation: 0
+    state: enabled
+- name: import_0
+  id: import
+  parameters:
+    alias: ''
+    comment: ''
+    imports: import numpy as np
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [224, 12.0]
+    rotation: 0
+    state: enabled
+- name: qtgui_const_sink_x_0
+  id: qtgui_const_sink_x
+  parameters:
+    affinity: ''
+    alias: ''
+    alpha1: '1.0'
+    alpha10: '1.0'
+    alpha2: '1.0'
+    alpha3: '1.0'
+    alpha4: '1.0'
+    alpha5: '1.0'
+    alpha6: '1.0'
+    alpha7: '1.0'
+    alpha8: '1.0'
+    alpha9: '1.0'
+    autoscale: 'False'
+    axislabels: 'True'
+    color1: '"blue"'
+    color10: '"red"'
+    color2: '"red"'
+    color3: '"red"'
+    color4: '"red"'
+    color5: '"red"'
+    color6: '"red"'
+    color7: '"red"'
+    color8: '"red"'
+    color9: '"red"'
+    comment: ''
+    grid: 'False'
+    gui_hint: ''
+    label1: ''
+    label10: ''
+    label2: ''
+    label3: ''
+    label4: ''
+    label5: ''
+    label6: ''
+    label7: ''
+    label8: ''
+    label9: ''
+    legend: 'True'
+    marker1: '0'
+    marker10: '0'
+    marker2: '0'
+    marker3: '0'
+    marker4: '0'
+    marker5: '0'
+    marker6: '0'
+    marker7: '0'
+    marker8: '0'
+    marker9: '0'
+    name: '""'
+    nconnections: '3'
+    size: '1024'
+    style1: '0'
+    style10: '0'
+    style2: '0'
+    style3: '0'
+    style4: '0'
+    style5: '0'
+    style6: '0'
+    style7: '0'
+    style8: '0'
+    style9: '0'
+    tr_chan: '0'
+    tr_level: '0.0'
+    tr_mode: qtgui.TRIG_MODE_FREE
+    tr_slope: qtgui.TRIG_SLOPE_POS
+    tr_tag: '""'
+    type: complex
+    update_time: '0.10'
+    width1: '1'
+    width10: '1'
+    width2: '1'
+    width3: '1'
+    width4: '1'
+    width5: '1'
+    width6: '1'
+    width7: '1'
+    width8: '1'
+    width9: '1'
+    xmax: '2'
+    xmin: '-2'
+    ymax: '2'
+    ymin: '-2'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1304, 800.0]
+    rotation: 0
+    state: true
+- name: qtgui_time_sink_x_0
+  id: qtgui_time_sink_x
+  parameters:
+    affinity: ''
+    alias: ''
+    alpha1: '1.0'
+    alpha10: '1.0'
+    alpha2: '1.0'
+    alpha3: '1.0'
+    alpha4: '1.0'
+    alpha5: '1.0'
+    alpha6: '1.0'
+    alpha7: '1.0'
+    alpha8: '1.0'
+    alpha9: '1.0'
+    autoscale: 'False'
+    axislabels: 'True'
+    color1: blue
+    color10: dark blue
+    color2: red
+    color3: green
+    color4: black
+    color5: cyan
+    color6: magenta
+    color7: yellow
+    color8: dark red
+    color9: dark green
+    comment: ''
+    ctrlpanel: 'False'
+    entags: 'True'
+    grid: 'False'
+    gui_hint: ''
+    label1: Signal 1
+    label10: Signal 10
+    label2: Signal 2
+    label3: Signal 3
+    label4: Signal 4
+    label5: Signal 5
+    label6: Signal 6
+    label7: Signal 7
+    label8: Signal 8
+    label9: Signal 9
+    legend: 'True'
+    marker1: '-1'
+    marker10: '-1'
+    marker2: '-1'
+    marker3: '-1'
+    marker4: '-1'
+    marker5: '-1'
+    marker6: '-1'
+    marker7: '-1'
+    marker8: '-1'
+    marker9: '-1'
+    name: '""'
+    nconnections: '1'
+    size: '1024'
+    srate: samp_rate / sps
+    stemplot: 'False'
+    style1: '1'
+    style10: '1'
+    style2: '1'
+    style3: '1'
+    style4: '1'
+    style5: '1'
+    style6: '1'
+    style7: '1'
+    style8: '1'
+    style9: '1'
+    tr_chan: '0'
+    tr_delay: '0'
+    tr_level: '0.0'
+    tr_mode: qtgui.TRIG_MODE_FREE
+    tr_slope: qtgui.TRIG_SLOPE_POS
+    tr_tag: '""'
+    type: float
+    update_time: '0.10'
+    width1: '1'
+    width10: '1'
+    width2: '1'
+    width3: '1'
+    width4: '1'
+    width5: '1'
+    width6: '1'
+    width7: '1'
+    width8: '1'
+    width9: '1'
+    ylabel: Amplitude
+    ymax: '10'
+    ymin: '0'
+    yunit: '""'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1272, 1060.0]
+    rotation: 0
+    state: true
+- name: virtual_sink_0
+  id: virtual_sink
+  parameters:
+    alias: ''
+    comment: ''
+    stream_id: modulated
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [952, 444.0]
+    rotation: 0
+    state: true
+- name: virtual_sink_1
+  id: virtual_sink
+  parameters:
+    alias: ''
+    comment: ''
+    stream_id: envelope
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1000, 756.0]
+    rotation: 0
+    state: true
+- name: virtual_sink_2
+  id: virtual_sink
+  parameters:
+    alias: ''
+    comment: ''
+    stream_id: symbols
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1336, 988.0]
+    rotation: 0
+    state: true
+- name: virtual_source_0
+  id: virtual_source
+  parameters:
+    alias: ''
+    comment: ''
+    stream_id: symbols
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [48, 1308.0]
+    rotation: 0
+    state: true
+- name: virtual_source_1
+  id: virtual_source
+  parameters:
+    alias: ''
+    comment: ''
+    stream_id: envelope
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [48, 1052.0]
+    rotation: 0
+    state: true
+- name: virtual_source_2
+  id: virtual_source
+  parameters:
+    alias: ''
+    comment: ''
+    stream_id: modulated
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [56, 756.0]
+    rotation: 0
+    state: true
+
+connections:
+- [analog_random_source_x_0, '0', blocks_stream_mux_0, '1']
+- [blocks_complex_to_mag_0, '0', qtgui_time_sink_x_0, '0']
+- [blocks_null_source_0, '0', blocks_stream_mux_0, '2']
+- [blocks_repack_bits_bb_0, '0', blocks_stream_to_vector_0, '0']
+- [blocks_stream_mux_0, '0', digital_constellation_modulator_0, '0']
+- [blocks_stream_to_vector_0, '0', fadingui_ber_0, '0']
+- [blocks_tagged_stream_align_0, '0', blocks_repack_bits_bb_0, '0']
+- [blocks_throttle_0, '0', virtual_sink_0, '0']
+- [blocks_vector_source_x_0, '0', blocks_stream_mux_0, '0']
+- [channels_channel_model_0, '0', channels_selective_fading_model_0, '0']
+- [channels_channel_model_0, '0', fadingui_multipath_fading_0, '0']
+- [channels_selective_fading_model_0, '0', virtual_sink_1, '0']
+- [digital_constellation_decoder_cb_0, '0', blocks_tagged_stream_align_0, '0']
+- [digital_constellation_modulator_0, '0', blocks_throttle_0, '0']
+- [digital_constellation_modulator_0, '0', fadingui_netsink_0, '0']
+- [digital_corr_est_cc_0, '0', fadingui_phasecorrection_0, '0']
+- [digital_corr_est_cc_0, '1', blocks_complex_to_mag_0, '0']
+- [digital_lms_dd_equalizer_cc_0, '0', digital_corr_est_cc_0, '0']
+- [digital_lms_dd_equalizer_cc_0, '0', qtgui_const_sink_x_0, '1']
+- [digital_pfb_clock_sync_xxx_0, '0', digital_lms_dd_equalizer_cc_0, '0']
+- [digital_pfb_clock_sync_xxx_0, '0', fadingui_netsink_4, '0']
+- [digital_pfb_clock_sync_xxx_0, '0', qtgui_const_sink_x_0, '0']
+- [fadingui_datasource_0, '0', digital_constellation_modulator_0, '0']
+- [fadingui_multipath_fading_0, '0', virtual_sink_1, '0']
+- [fadingui_phasecorrection_0, '0', fadingui_netsink_3, '0']
+- [fadingui_phasecorrection_0, '0', qtgui_const_sink_x_0, '2']
+- [fadingui_phasecorrection_0, '0', virtual_sink_2, '0']
+- [virtual_source_0, '0', digital_constellation_decoder_cb_0, '0']
+- [virtual_source_1, '0', digital_pfb_clock_sync_xxx_0, '0']
+- [virtual_source_2, '0', channels_channel_model_0, '0']
+
+metadata:
+  file_format: 1
diff --git a/flowgraphs/qam_sim.py b/flowgraphs/qam_sim.py
new file mode 100755
index 0000000..9f22572
--- /dev/null
+++ b/flowgraphs/qam_sim.py
@@ -0,0 +1,352 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+#
+# SPDX-License-Identifier: GPL-3.0
+#
+# GNU Radio Python Flow Graph
+# Title: QAM Sim
+# Author: Naoki Sean Pross, Sara Cinzia Halter
+# GNU Radio version: 3.8.2.0
+
+from distutils.version import StrictVersion
+
+if __name__ == '__main__':
+    import ctypes
+    import sys
+    if sys.platform.startswith('linux'):
+        try:
+            x11 = ctypes.cdll.LoadLibrary('libX11.so')
+            x11.XInitThreads()
+        except:
+            print("Warning: failed to XInitThreads()")
+
+from PyQt5 import Qt
+from gnuradio import qtgui
+from gnuradio.filter import firdes
+import sip
+from gnuradio import blocks
+import numpy
+from gnuradio import channels
+from gnuradio import digital
+from gnuradio import gr
+import sys
+import signal
+from argparse import ArgumentParser
+from gnuradio.eng_arg import eng_float, intx
+from gnuradio import eng_notation
+import fadingui
+import numpy as np
+
+from gnuradio import qtgui
+
+class qam_sim(gr.top_block, Qt.QWidget):
+
+    def __init__(self):
+        gr.top_block.__init__(self, "QAM Sim")
+        Qt.QWidget.__init__(self)
+        self.setWindowTitle("QAM Sim")
+        qtgui.util.check_set_qss()
+        try:
+            self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
+        except:
+            pass
+        self.top_scroll_layout = Qt.QVBoxLayout()
+        self.setLayout(self.top_scroll_layout)
+        self.top_scroll = Qt.QScrollArea()
+        self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
+        self.top_scroll_layout.addWidget(self.top_scroll)
+        self.top_scroll.setWidgetResizable(True)
+        self.top_widget = Qt.QWidget()
+        self.top_scroll.setWidget(self.top_widget)
+        self.top_layout = Qt.QVBoxLayout(self.top_widget)
+        self.top_grid_layout = Qt.QGridLayout()
+        self.top_layout.addLayout(self.top_grid_layout)
+
+        self.settings = Qt.QSettings("GNU Radio", "qam_sim")
+
+        try:
+            if StrictVersion(Qt.qVersion()) < StrictVersion("5.0.0"):
+                self.restoreGeometry(self.settings.value("geometry").toByteArray())
+            else:
+                self.restoreGeometry(self.settings.value("geometry"))
+        except:
+            pass
+
+        ##################################################
+        # Variables
+        ##################################################
+        self.testvec = testvec = [0x1f, 0x35] + [0x12, 0x48]
+        self.sps = sps = 4
+        self.nfilts = nfilts = 32
+        self.excess_bw = excess_bw = 0.35
+        self.samp_rate = samp_rate = 1e6
+        self.rrc_taps = rrc_taps = firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(sps), excess_bw, 45*nfilts)
+        self.qam_const = qam_const = digital.constellation_16qam().base()
+        self.frame_len = frame_len = len(testvec) +4
+        self.carrier_freq = carrier_freq = 2.4e9
+        self.access_code_symbols = access_code_symbols = [(-0.31622776601683794-0.31622776601683794j), (-0.31622776601683794+0.31622776601683794j), (-0.9486832980505138-0.9486832980505138j), (-0.9486832980505138-0.31622776601683794j)]
+
+        ##################################################
+        # Blocks
+        ##################################################
+        self.qtgui_time_sink_x_0 = qtgui.time_sink_f(
+            1024, #size
+            samp_rate / sps, #samp_rate
+            "", #name
+            1 #number of inputs
+        )
+        self.qtgui_time_sink_x_0.set_update_time(0.10)
+        self.qtgui_time_sink_x_0.set_y_axis(0, 10)
+
+        self.qtgui_time_sink_x_0.set_y_label('Amplitude', "")
+
+        self.qtgui_time_sink_x_0.enable_tags(True)
+        self.qtgui_time_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, 0, "")
+        self.qtgui_time_sink_x_0.enable_autoscale(False)
+        self.qtgui_time_sink_x_0.enable_grid(False)
+        self.qtgui_time_sink_x_0.enable_axis_labels(True)
+        self.qtgui_time_sink_x_0.enable_control_panel(False)
+        self.qtgui_time_sink_x_0.enable_stem_plot(False)
+
+
+        labels = ['Signal 1', 'Signal 2', 'Signal 3', 'Signal 4', 'Signal 5',
+            'Signal 6', 'Signal 7', 'Signal 8', 'Signal 9', 'Signal 10']
+        widths = [1, 1, 1, 1, 1,
+            1, 1, 1, 1, 1]
+        colors = ['blue', 'red', 'green', 'black', 'cyan',
+            'magenta', 'yellow', 'dark red', 'dark green', 'dark blue']
+        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
+            1.0, 1.0, 1.0, 1.0, 1.0]
+        styles = [1, 1, 1, 1, 1,
+            1, 1, 1, 1, 1]
+        markers = [-1, -1, -1, -1, -1,
+            -1, -1, -1, -1, -1]
+
+
+        for i in range(1):
+            if len(labels[i]) == 0:
+                self.qtgui_time_sink_x_0.set_line_label(i, "Data {0}".format(i))
+            else:
+                self.qtgui_time_sink_x_0.set_line_label(i, labels[i])
+            self.qtgui_time_sink_x_0.set_line_width(i, widths[i])
+            self.qtgui_time_sink_x_0.set_line_color(i, colors[i])
+            self.qtgui_time_sink_x_0.set_line_style(i, styles[i])
+            self.qtgui_time_sink_x_0.set_line_marker(i, markers[i])
+            self.qtgui_time_sink_x_0.set_line_alpha(i, alphas[i])
+
+        self._qtgui_time_sink_x_0_win = sip.wrapinstance(self.qtgui_time_sink_x_0.pyqwidget(), Qt.QWidget)
+        self.top_grid_layout.addWidget(self._qtgui_time_sink_x_0_win)
+        self.qtgui_const_sink_x_0 = qtgui.const_sink_c(
+            1024, #size
+            "", #name
+            3 #number of inputs
+        )
+        self.qtgui_const_sink_x_0.set_update_time(0.10)
+        self.qtgui_const_sink_x_0.set_y_axis(-2, 2)
+        self.qtgui_const_sink_x_0.set_x_axis(-2, 2)
+        self.qtgui_const_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, "")
+        self.qtgui_const_sink_x_0.enable_autoscale(False)
+        self.qtgui_const_sink_x_0.enable_grid(False)
+        self.qtgui_const_sink_x_0.enable_axis_labels(True)
+
+
+        labels = ['', '', '', '', '',
+            '', '', '', '', '']
+        widths = [1, 1, 1, 1, 1,
+            1, 1, 1, 1, 1]
+        colors = ["blue", "red", "red", "red", "red",
+            "red", "red", "red", "red", "red"]
+        styles = [0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0]
+        markers = [0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0]
+        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
+            1.0, 1.0, 1.0, 1.0, 1.0]
+
+        for i in range(3):
+            if len(labels[i]) == 0:
+                self.qtgui_const_sink_x_0.set_line_label(i, "Data {0}".format(i))
+            else:
+                self.qtgui_const_sink_x_0.set_line_label(i, labels[i])
+            self.qtgui_const_sink_x_0.set_line_width(i, widths[i])
+            self.qtgui_const_sink_x_0.set_line_color(i, colors[i])
+            self.qtgui_const_sink_x_0.set_line_style(i, styles[i])
+            self.qtgui_const_sink_x_0.set_line_marker(i, markers[i])
+            self.qtgui_const_sink_x_0.set_line_alpha(i, alphas[i])
+
+        self._qtgui_const_sink_x_0_win = sip.wrapinstance(self.qtgui_const_sink_x_0.pyqwidget(), Qt.QWidget)
+        self.top_grid_layout.addWidget(self._qtgui_const_sink_x_0_win)
+        self.fadingui_phasecorrection_0 = fadingui.phasecorrection(frame_len)
+        self.fadingui_multipath_fading_0 = fadingui.multipath_fading(amplitudes=[0.12], delays=[1.8], los =True)
+        self.fadingui_ber_0 = fadingui.ber(vgl=testvec + list(np.zeros(4)), vlen=frame_len)
+        self.digital_pfb_clock_sync_xxx_0 = digital.pfb_clock_sync_ccf(sps, 2 * np.pi / 100, rrc_taps, 32, 16, 1.5, 1)
+        self.digital_lms_dd_equalizer_cc_0 = digital.lms_dd_equalizer_cc(2, 5e-3, 1, qam_const)
+        self.digital_corr_est_cc_0 = digital.corr_est_cc(access_code_symbols, 1, len(access_code_symbols) // 2, 0.9, digital.THRESHOLD_ABSOLUTE)
+        self.digital_constellation_modulator_0 = digital.generic_mod(
+            constellation=qam_const,
+            differential=False,
+            samples_per_symbol=sps,
+            pre_diff_code=True,
+            excess_bw=excess_bw,
+            verbose=False,
+            log=False)
+        self.digital_constellation_decoder_cb_0 = digital.constellation_decoder_cb(qam_const)
+        self.channels_channel_model_0 = channels.channel_model(
+            noise_voltage=100e-3,
+            frequency_offset=0,
+            epsilon=1.0,
+            taps=[np.exp(1j * 30 / 180 * np.pi)],
+            noise_seed=243,
+            block_tags=False)
+        self.blocks_vector_source_x_0 = blocks.vector_source_b(testvec, True, 1, [])
+        self.blocks_throttle_0 = blocks.throttle(gr.sizeof_gr_complex*1, samp_rate,True)
+        self.blocks_tagged_stream_align_0 = blocks.tagged_stream_align(gr.sizeof_char*1, 'frame_start')
+        self.blocks_stream_to_vector_0 = blocks.stream_to_vector(gr.sizeof_char*1, frame_len)
+        self.blocks_stream_mux_0 = blocks.stream_mux(gr.sizeof_char*1, [len(testvec), 4, 0])
+        self.blocks_repack_bits_bb_0 = blocks.repack_bits_bb(2, 8, "", False, gr.GR_LSB_FIRST)
+        self.blocks_null_source_0 = blocks.null_source(gr.sizeof_char*1)
+        self.blocks_complex_to_mag_0 = blocks.complex_to_mag(1)
+        self.analog_random_source_x_0 = blocks.vector_source_b(list(map(int, numpy.random.randint(0, 255, 400))), True)
+
+
+
+        ##################################################
+        # Connections
+        ##################################################
+        self.connect((self.analog_random_source_x_0, 0), (self.blocks_stream_mux_0, 1))
+        self.connect((self.blocks_complex_to_mag_0, 0), (self.qtgui_time_sink_x_0, 0))
+        self.connect((self.blocks_null_source_0, 0), (self.blocks_stream_mux_0, 2))
+        self.connect((self.blocks_repack_bits_bb_0, 0), (self.blocks_stream_to_vector_0, 0))
+        self.connect((self.blocks_stream_mux_0, 0), (self.digital_constellation_modulator_0, 0))
+        self.connect((self.blocks_stream_to_vector_0, 0), (self.fadingui_ber_0, 0))
+        self.connect((self.blocks_tagged_stream_align_0, 0), (self.blocks_repack_bits_bb_0, 0))
+        self.connect((self.blocks_throttle_0, 0), (self.channels_channel_model_0, 0))
+        self.connect((self.blocks_vector_source_x_0, 0), (self.blocks_stream_mux_0, 0))
+        self.connect((self.channels_channel_model_0, 0), (self.fadingui_multipath_fading_0, 0))
+        self.connect((self.digital_constellation_decoder_cb_0, 0), (self.blocks_tagged_stream_align_0, 0))
+        self.connect((self.digital_constellation_modulator_0, 0), (self.blocks_throttle_0, 0))
+        self.connect((self.digital_corr_est_cc_0, 1), (self.blocks_complex_to_mag_0, 0))
+        self.connect((self.digital_corr_est_cc_0, 0), (self.fadingui_phasecorrection_0, 0))
+        self.connect((self.digital_lms_dd_equalizer_cc_0, 0), (self.digital_corr_est_cc_0, 0))
+        self.connect((self.digital_lms_dd_equalizer_cc_0, 0), (self.qtgui_const_sink_x_0, 1))
+        self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.digital_lms_dd_equalizer_cc_0, 0))
+        self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.qtgui_const_sink_x_0, 0))
+        self.connect((self.fadingui_multipath_fading_0, 0), (self.digital_pfb_clock_sync_xxx_0, 0))
+        self.connect((self.fadingui_phasecorrection_0, 0), (self.digital_constellation_decoder_cb_0, 0))
+        self.connect((self.fadingui_phasecorrection_0, 0), (self.qtgui_const_sink_x_0, 2))
+
+
+    def closeEvent(self, event):
+        self.settings = Qt.QSettings("GNU Radio", "qam_sim")
+        self.settings.setValue("geometry", self.saveGeometry())
+        event.accept()
+
+    def get_testvec(self):
+        return self.testvec
+
+    def set_testvec(self, testvec):
+        self.testvec = testvec
+        self.set_frame_len(len(self.testvec) +4)
+        self.blocks_vector_source_x_0.set_data(self.testvec, [])
+
+    def get_sps(self):
+        return self.sps
+
+    def set_sps(self, sps):
+        self.sps = sps
+        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
+        self.qtgui_time_sink_x_0.set_samp_rate(self.samp_rate / self.sps)
+
+    def get_nfilts(self):
+        return self.nfilts
+
+    def set_nfilts(self, nfilts):
+        self.nfilts = nfilts
+        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
+
+    def get_excess_bw(self):
+        return self.excess_bw
+
+    def set_excess_bw(self, excess_bw):
+        self.excess_bw = excess_bw
+        self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
+
+    def get_samp_rate(self):
+        return self.samp_rate
+
+    def set_samp_rate(self, samp_rate):
+        self.samp_rate = samp_rate
+        self.blocks_throttle_0.set_sample_rate(self.samp_rate)
+        self.qtgui_time_sink_x_0.set_samp_rate(self.samp_rate / self.sps)
+
+    def get_rrc_taps(self):
+        return self.rrc_taps
+
+    def set_rrc_taps(self, rrc_taps):
+        self.rrc_taps = rrc_taps
+        self.digital_pfb_clock_sync_xxx_0.update_taps(self.rrc_taps)
+
+    def get_qam_const(self):
+        return self.qam_const
+
+    def set_qam_const(self, qam_const):
+        self.qam_const = qam_const
+
+    def get_frame_len(self):
+        return self.frame_len
+
+    def set_frame_len(self, frame_len):
+        self.frame_len = frame_len
+
+    def get_carrier_freq(self):
+        return self.carrier_freq
+
+    def set_carrier_freq(self, carrier_freq):
+        self.carrier_freq = carrier_freq
+
+    def get_access_code_symbols(self):
+        return self.access_code_symbols
+
+    def set_access_code_symbols(self, access_code_symbols):
+        self.access_code_symbols = access_code_symbols
+        self.digital_corr_est_cc_0.set_mark_delay(len(self.access_code_symbols) // 2)
+
+
+
+
+
+def main(top_block_cls=qam_sim, options=None):
+    if gr.enable_realtime_scheduling() != gr.RT_OK:
+        print("Error: failed to enable real-time scheduling.")
+
+    if StrictVersion("4.5.0") <= StrictVersion(Qt.qVersion()) < StrictVersion("5.0.0"):
+        style = gr.prefs().get_string('qtgui', 'style', 'raster')
+        Qt.QApplication.setGraphicsSystem(style)
+    qapp = Qt.QApplication(sys.argv)
+
+    tb = top_block_cls()
+
+    tb.start()
+
+    tb.show()
+
+    def sig_handler(sig=None, frame=None):
+        Qt.QApplication.quit()
+
+    signal.signal(signal.SIGINT, sig_handler)
+    signal.signal(signal.SIGTERM, sig_handler)
+
+    timer = Qt.QTimer()
+    timer.start(500)
+    timer.timeout.connect(lambda: None)
+
+    def quitting():
+        tb.stop()
+        tb.wait()
+
+    qapp.aboutToQuit.connect(quitting)
+    qapp.exec_()
+
+if __name__ == '__main__':
+    main()
-- 
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