options:
  parameters:
    author: DJ0ABR
    category: '[GRC Hier Blocks]'
    cmake_opt: ''
    comment: 'send and receive a datastream

      with 3500 bit/s via a QO-100

      SSB channel with 2700 Hz bandwidth

      works with Gnu Radio 3.8.xxx ONLY

      does not work with 3.7.x'
    copyright: ''
    description: works with Gnu Radio 3.8.xxx
    gen_cmake: 'Off'
    gen_linking: dynamic
    generate_options: no_gui
    hier_block_src_path: '.:'
    id: qpsk_rx
    max_nouts: '0'
    output_language: python
    placement: (0,0)
    qt_qss_theme: ''
    realtime_scheduling: ''
    run: 'True'
    run_command: '{python} -u {filename}'
    run_options: run
    sizing_mode: fixed
    thread_safe_setters: ''
    title: QPSK RX-Modem
    window_size: ''
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 8]
    rotation: 0
    state: enabled

blocks:
- name: mixf
  id: variable
  parameters:
    comment: 'mid frequency

      in the audio

      spectrum. Set to get

      lowest and highest

      frequency within the

      transceiver filter range.'
    value: '1500'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [328, 12.0]
    rotation: 0
    state: enabled
- name: nfilts
  id: variable
  parameters:
    comment: ''
    value: '32'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [704, 12.0]
    rotation: 0
    state: enabled
- name: outputsps
  id: variable
  parameters:
    comment: 'Samples/Symbol

      fixed value,

      do not change.

      Used to adjust

      bitrate vs. bandwidth'
    value: '7'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 212.0]
    rotation: 0
    state: enabled
- name: qpsk__constellation
  id: variable_constellation_rect
  parameters:
    comment: ''
    const_points: '[0.707+0.707j, -0.707+0.707j, -0.707-0.707j, 0.707-0.707j]'
    imag_sect: '2'
    precision: '8'
    real_sect: '2'
    rot_sym: '4'
    soft_dec_lut: '''auto'''
    sym_map: '[0, 1, 2, 3]'
    w_imag_sect: '1'
    w_real_sect: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [976, 12.0]
    rotation: 0
    state: enabled
- name: sps
  id: variable
  parameters:
    comment: 'Resampling Rate

      of the Polyphase

      Clock Sync and its filter'
    value: '4'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [568, 12.0]
    rotation: 0
    state: enabled
- name: analog_agc2_xx_0_0
  id: analog_agc2_xx
  parameters:
    affinity: ''
    alias: ''
    attack_rate: '0.01'
    comment: 'Costas loop needs AGC

      loop gain depends on input level'
    decay_rate: '0.2'
    gain: '1'
    max_gain: '3'
    maxoutbuf: '0'
    minoutbuf: '0'
    reference: '1'
    type: complex
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [544, 636.0]
    rotation: 0
    state: enabled
- name: analog_const_source_x_0
  id: analog_const_source_x
  parameters:
    affinity: ''
    alias: ''
    comment: 'Marker to find the start

      of the values'
    const: '1000'
    maxoutbuf: '0'
    minoutbuf: '0'
    type: int
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [464, 788.0]
    rotation: 180
    state: true
- name: analog_const_source_x_0_0
  id: analog_const_source_x
  parameters:
    affinity: ''
    alias: ''
    comment: 'Marker to find the start

      of the values'
    const: '1000'
    maxoutbuf: '0'
    minoutbuf: '0'
    type: int
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [536, 948.0]
    rotation: 180
    state: true
- name: analog_const_source_x_0_0_0
  id: analog_const_source_x
  parameters:
    affinity: ''
    alias: ''
    comment: 'Marker to find the start

      of the values'
    const: '0'
    maxoutbuf: '0'
    minoutbuf: '0'
    type: float
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [824, 1140.0]
    rotation: 180
    state: disabled
- name: analog_const_source_x_0_1
  id: analog_const_source_x
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    const: '16777216'
    maxoutbuf: '0'
    minoutbuf: '0'
    type: float
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [792, 916.0]
    rotation: 180
    state: true
- name: analog_sig_source_x_0_0_0
  id: analog_sig_source_x
  parameters:
    affinity: ''
    alias: ''
    amp: '1'
    comment: 'the modulator output is in the baseband at 0 Hz.

      Mix it with the required audio mid frequency.

      cos and -sin are used to combine I and Q

      into the frinal signal.

      Use it als for RX in the reverse direction'
    freq: mixf
    maxoutbuf: '0'
    minoutbuf: '0'
    offset: '0'
    phase: '0'
    samp_rate: samp_rate
    type: complex
    waveform: analog.GR_COS_WAVE
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [200, 220.0]
    rotation: 0
    state: enabled
- name: analog_sig_source_x_1
  id: analog_sig_source_x
  parameters:
    affinity: ''
    alias: ''
    amp: '1'
    comment: "Markers for the \nFrequ.Sink"
    freq: '1500'
    maxoutbuf: '0'
    minoutbuf: '0'
    offset: '0'
    phase: '0'
    samp_rate: samp_rate
    type: float
    waveform: analog.GR_COS_WAVE
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [712, 140.0]
    rotation: 0
    state: disabled
- name: analog_sig_source_x_1_0
  id: analog_sig_source_x
  parameters:
    affinity: ''
    alias: ''
    amp: '1'
    comment: ''
    freq: '3000'
    maxoutbuf: '0'
    minoutbuf: '0'
    offset: '0'
    phase: '0'
    samp_rate: samp_rate
    type: float
    waveform: analog.GR_COS_WAVE
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [704, 300.0]
    rotation: 0
    state: disabled
- name: audio_source_0
  id: audio_source
  parameters:
    affinity: ''
    alias: ''
    comment: get audio from transceiver
    device_name: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    num_outputs: '1'
    ok_to_block: 'True'
    samp_rate: samp_rate
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1328, 468.0]
    rotation: 180
    state: true
- name: blocks_complex_to_float_0
  id: blocks_complex_to_float
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [824, 1032.0]
    rotation: 180
    state: enabled
- name: blocks_complex_to_float_1
  id: blocks_complex_to_float
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [456, 248.0]
    rotation: 0
    state: enabled
- name: blocks_float_to_complex_0
  id: blocks_float_to_complex
  parameters:
    affinity: ''
    alias: ''
    comment: 'combile I and Q

      to complex signal'
    maxoutbuf: '0'
    minoutbuf: '0'
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [320, 464.0]
    rotation: 180
    state: enabled
- name: blocks_float_to_int_0
  id: blocks_float_to_int
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    scale: '16777216'
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [632, 1028.0]
    rotation: 180
    state: true
- name: blocks_float_to_int_0_0
  id: blocks_float_to_int
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    scale: '16777216'
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [632, 1076.0]
    rotation: 180
    state: true
- name: blocks_float_to_int_0_1
  id: blocks_float_to_int
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    scale: '1'
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [512, 868.0]
    rotation: 180
    state: true
- name: blocks_interleave_0
  id: blocks_interleave
  parameters:
    affinity: ''
    alias: ''
    blocksize: '1'
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    num_streams: '2'
    type: int
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [360, 872.0]
    rotation: 180
    state: true
- name: blocks_interleave_0_0
  id: blocks_interleave
  parameters:
    affinity: ''
    alias: ''
    blocksize: '1'
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    num_streams: '3'
    type: int
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [320, 1000.0]
    rotation: 180
    state: true
- name: blocks_multiply_xx_0_0_0
  id: blocks_multiply_xx
  parameters:
    affinity: ''
    alias: ''
    comment: make I
    maxoutbuf: '0'
    minoutbuf: '0'
    num_inputs: '2'
    type: float
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [520, 408.0]
    rotation: 180
    state: enabled
- name: blocks_multiply_xx_0_1
  id: blocks_multiply_xx
  parameters:
    affinity: ''
    alias: ''
    comment: make Q
    maxoutbuf: '0'
    minoutbuf: '0'
    num_inputs: '2'
    type: float
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [560, 512.0]
    rotation: 180
    state: enabled
- name: blocks_multiply_xx_0_1_0
  id: blocks_multiply_xx
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    num_inputs: '2'
    type: float
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [640, 856.0]
    rotation: 180
    state: enabled
- name: blocks_udp_sink_0
  id: blocks_udp_sink
  parameters:
    affinity: ''
    alias: ''
    comment: 'send RX data to UDP

      port 1235 on the local machine'
    eof: 'False'
    ipaddr: 127.0.0.1
    port: '40135'
    psize: '344'
    type: byte
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1240, 588.0]
    rotation: 0
    state: true
- name: blocks_udp_sink_0_0
  id: blocks_udp_sink
  parameters:
    affinity: ''
    alias: ''
    comment: 'send QPSK Constellation data to UDP

      port 1236 on the local machine'
    eof: 'False'
    ipaddr: 127.0.0.1
    port: '40136'
    psize: '120'
    type: int
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [64, 860.0]
    rotation: 180
    state: enabled
- name: blocks_udp_sink_0_0_0
  id: blocks_udp_sink
  parameters:
    affinity: ''
    alias: ''
    comment: 'send QPSK Constellation data to UDP

      port 1236 on the local machine'
    eof: 'False'
    ipaddr: 127.0.0.1
    port: '40137'
    psize: '120'
    type: int
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [64, 988.0]
    rotation: 180
    state: enabled
- name: digital_constellation_decoder_cb_0
  id: digital_constellation_decoder_cb
  parameters:
    affinity: ''
    alias: ''
    comment: 'QPSK decoding, same

      parameters as modulator'
    constellation: qpsk__constellation
    maxoutbuf: '0'
    minoutbuf: '0'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [992, 612.0]
    rotation: 0
    state: enabled
- name: digital_costas_loop_cc_0
  id: digital_costas_loop_cc
  parameters:
    affinity: ''
    alias: ''
    comment: 'locks the signal and

      converts into baseband'
    maxoutbuf: '0'
    minoutbuf: '0'
    order: '4'
    use_snr: 'False'
    w: '0.06'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [744, 616.0]
    rotation: 0
    state: enabled
- name: digital_lms_dd_equalizer_cc_0
  id: digital_lms_dd_equalizer_cc
  parameters:
    affinity: ''
    alias: ''
    cnst: qpsk__constellation
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    mu: '0.01'
    num_taps: '15'
    sps: outputsps
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [288, 628.0]
    rotation: 0
    state: enabled
- name: digital_pfb_clock_sync_xxx_0
  id: digital_pfb_clock_sync_xxx
  parameters:
    affinity: ''
    alias: ''
    comment: 'synchronize the Clock,

      works very well with drifting

      QO-100 signal'
    filter_size: nfilts
    init_phase: nfilts/2
    loop_bw: '0.1'
    max_dev: '1.5'
    maxoutbuf: '0'
    minoutbuf: '0'
    osps: outputsps
    sps: sps
    taps: firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(sps), 0.35, 11*sps*nfilts)
    type: ccf
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [64, 652.0]
    rotation: 0
    state: enabled
- name: low_pass_filter_0
  id: low_pass_filter
  parameters:
    affinity: ''
    alias: ''
    beta: '6.76'
    comment: 'Anti-Aliasing filter

      Level correction

      and decimation'
    cutoff_freq: '3500'
    decim: '1'
    gain: '8'
    interp: '1'
    maxoutbuf: '0'
    minoutbuf: '0'
    samp_rate: samp_rate
    type: fir_filter_fff
    width: '3100'
    win: firdes.WIN_HAMMING
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1048, 412.0]
    rotation: 180
    state: enabled
- name: mmse_resampler_xx_0
  id: mmse_resampler_xx
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    phase_shift: '0'
    resamp_ratio: samp_rate / 8000
    type: float
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [776, 768.0]
    rotation: 180
    state: true
- name: mmse_resampler_xx_1
  id: mmse_resampler_xx
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    phase_shift: '0'
    resamp_ratio: resamp
    type: complex
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [72, 480.0]
    rotation: 180
    state: true
- 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: '2'
    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: [768, 532.0]
    rotation: 180
    state: disabled
- name: qtgui_freq_sink_x_1
  id: qtgui_freq_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'
    average: '1.0'
    axislabels: 'True'
    bw: samp_rate
    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'
    fc: '0'
    fftsize: '4096'
    freqhalf: 'False'
    grid: 'True'
    gui_hint: ''
    label: Relative Gain
    label1: ''
    label10: ''''''
    label2: ''''''
    label3: ''''''
    label4: ''''''
    label5: ''''''
    label6: ''''''
    label7: ''''''
    label8: ''''''
    label9: ''''''
    legend: 'True'
    maxoutbuf: '0'
    minoutbuf: '0'
    name: TX / RX Spectrum
    nconnections: '3'
    showports: 'False'
    tr_chan: '0'
    tr_level: '0.0'
    tr_mode: qtgui.TRIG_MODE_FREE
    tr_tag: '""'
    type: float
    units: dB
    update_time: '.1'
    width1: '1'
    width10: '1'
    width2: '1'
    width3: '1'
    width4: '1'
    width5: '1'
    width6: '1'
    width7: '1'
    width8: '1'
    width9: '1'
    wintype: firdes.WIN_BLACKMAN_hARRIS
    ymax: '10'
    ymin: '-140'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [992, 208.0]
    rotation: 0
    state: disabled
- name: resamp
  id: parameter
  parameters:
    alias: ''
    comment: "Resampling Rate\nfrom Audio Rate\nto 8kS/s which is\nthe input of the\
      \ \nPolypashe Clock"
    hide: none
    label: resamp
    short_id: r
    type: intx
    value: '5'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [464, 12.0]
    rotation: 0
    state: true
- name: samp_rate
  id: parameter
  parameters:
    alias: ''
    comment: Audio Rate
    hide: none
    label: samp_rate
    short_id: s
    type: intx
    value: '44100'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [216, 12.0]
    rotation: 0
    state: true

connections:
- [analog_agc2_xx_0_0, '0', digital_costas_loop_cc_0, '0']
- [analog_const_source_x_0, '0', blocks_interleave_0, '0']
- [analog_const_source_x_0_0, '0', blocks_interleave_0_0, '0']
- [analog_const_source_x_0_0_0, '0', blocks_float_to_int_0_0, '0']
- [analog_const_source_x_0_1, '0', blocks_multiply_xx_0_1_0, '1']
- [analog_sig_source_x_0_0_0, '0', blocks_complex_to_float_1, '0']
- [analog_sig_source_x_1, '0', qtgui_freq_sink_x_1, '1']
- [analog_sig_source_x_1_0, '0', qtgui_freq_sink_x_1, '2']
- [audio_source_0, '0', low_pass_filter_0, '0']
- [audio_source_0, '0', mmse_resampler_xx_0, '0']
- [blocks_complex_to_float_0, '0', blocks_float_to_int_0, '0']
- [blocks_complex_to_float_0, '1', blocks_float_to_int_0_0, '0']
- [blocks_complex_to_float_1, '0', blocks_multiply_xx_0_1, '1']
- [blocks_complex_to_float_1, '1', blocks_multiply_xx_0_0_0, '1']
- [blocks_float_to_complex_0, '0', mmse_resampler_xx_1, '0']
- [blocks_float_to_int_0, '0', blocks_interleave_0_0, '1']
- [blocks_float_to_int_0_0, '0', blocks_interleave_0_0, '2']
- [blocks_float_to_int_0_1, '0', blocks_interleave_0, '1']
- [blocks_interleave_0, '0', blocks_udp_sink_0_0, '0']
- [blocks_interleave_0_0, '0', blocks_udp_sink_0_0_0, '0']
- [blocks_multiply_xx_0_0_0, '0', blocks_float_to_complex_0, '0']
- [blocks_multiply_xx_0_1, '0', blocks_float_to_complex_0, '1']
- [blocks_multiply_xx_0_1_0, '0', blocks_float_to_int_0_1, '0']
- [digital_constellation_decoder_cb_0, '0', blocks_udp_sink_0, '0']
- [digital_costas_loop_cc_0, '0', blocks_complex_to_float_0, '0']
- [digital_costas_loop_cc_0, '0', digital_constellation_decoder_cb_0, '0']
- [digital_costas_loop_cc_0, '0', qtgui_const_sink_x_0, '0']
- [digital_lms_dd_equalizer_cc_0, '0', analog_agc2_xx_0_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']
- [low_pass_filter_0, '0', blocks_multiply_xx_0_0_0, '0']
- [low_pass_filter_0, '0', blocks_multiply_xx_0_1, '0']
- [low_pass_filter_0, '0', qtgui_freq_sink_x_1, '0']
- [mmse_resampler_xx_0, '0', blocks_multiply_xx_0_1_0, '0']
- [mmse_resampler_xx_1, '0', digital_pfb_clock_sync_xxx_0, '0']

metadata:
  file_format: 1