BBC Concurrent Codes

Two messages OR'd into one codeword, both recovered.
Author James Morrison
Category gr-bbc
Blocks 16
Connections 10
File gr-bbc/bbc_concurrent_codes.grc
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Blocks used

Block	Module	Used
Variable	`GNU Radio`	5
BBC Encoder	`gr-bbc`	2
Vector Source	`GNU Radio`	2
Vector to Stream	`GNU Radio`	2
BBC Decoder	`gr-bbc`	1
Message Debug	`GNU Radio`	1
Null Sink	`GNU Radio`	1
Or	`GNU Radio`	1
Stream to Vector	`GNU Radio`	1
Flowgraph source

gr-bbc/bbc_concurrent_codes.grc
options:
  parameters:
    author: James Morrison
    catch_exceptions: 'True'
    category: '[GRC Hier Blocks]'
    cmake_opt: ''
    comment: ''
    copyright: ''
    description: Two messages OR'd into one codeword, both recovered.
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: no_gui
    hier_block_src_path: '.:'
    id: bbc_concurrent_codes
    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: BBC Concurrent Codes
    window_size: ''
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [10, 10]
    rotation: 0
    state: enabled

blocks:
- name: CHECKSUM_BITS
  id: variable
  parameters:
    comment: ''
    value: '32'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [600, 10]
    rotation: 0
    state: enabled
- name: CODEWORD_LENGTH
  id: variable
  parameters:
    comment: ''
    value: '8192'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [820, 10]
    rotation: 0
    state: enabled
- name: MESSAGE_LENGTH
  id: variable
  parameters:
    comment: ''
    value: '16'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1070, 10]
    rotation: 0
    state: enabled
- name: message1
  id: variable
  parameters:
    comment: Hex bytes, matching Message Debug's display.
    value: '[0x66, 0x69, 0x72, 0x73, 0x74, 0x20, 0x73, 0x65, 0x6e, 0x64, 0x65, 0x72, 0x2e, 0x2e, 0x2e, 0x00]'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1300, 10]
    rotation: 0
    state: enabled
- name: message2
  id: variable
  parameters:
    comment: Hex bytes, matching Message Debug's display.
    value: '[0x73, 0x65, 0x63, 0x6f, 0x6e, 0x64, 0x20, 0x73, 0x65, 0x6e, 0x64, 0x65, 0x72, 0x2e, 0x2e, 0x00]'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [10, 170]
    rotation: 0
    state: enabled
- name: blocks_vector_source_x_0
  id: blocks_vector_source_x
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    repeat: 'False'
    tags: '[]'
    type: byte
    vector: message1
    vlen: MESSAGE_LENGTH
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [10, 270]
    rotation: 0
    state: enabled
- name: blocks_vector_source_x_1
  id: blocks_vector_source_x
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    repeat: 'False'
    tags: '[]'
    type: byte
    vector: message2
    vlen: MESSAGE_LENGTH
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [10, 410]
    rotation: 0
    state: enabled
- name: bbc_bbc_encoder_0
  id: bbc_bbc_encoder
  parameters:
    affinity: ''
    alias: ''
    checksum_length: CHECKSUM_BITS
    codeword_length: CODEWORD_LENGTH
    comment: ''
    maxoutbuf: '0'
    message_length: MESSAGE_LENGTH
    minoutbuf: '0'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [370, 270]
    rotation: 0
    state: enabled
- name: bbc_bbc_encoder_1
  id: bbc_bbc_encoder
  parameters:
    affinity: ''
    alias: ''
    checksum_length: CHECKSUM_BITS
    codeword_length: CODEWORD_LENGTH
    comment: ''
    maxoutbuf: '0'
    message_length: MESSAGE_LENGTH
    minoutbuf: '0'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [370, 410]
    rotation: 0
    state: enabled
- name: blocks_vector_to_stream_0
  id: blocks_vector_to_stream
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    num_items: CODEWORD_LENGTH
    type: byte
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [810, 290]
    rotation: 0
    state: enabled
- name: blocks_vector_to_stream_1
  id: blocks_vector_to_stream
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    num_items: CODEWORD_LENGTH
    type: byte
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [810, 430]
    rotation: 0
    state: enabled
- name: blocks_or_xx_0
  id: blocks_or_xx
  parameters:
    affinity: ''
    alias: ''
    comment: Both senders share one codeword. Marks are only ever added, so
      neither message is destroyed.
    maxoutbuf: '0'
    minoutbuf: '0'
    num_inputs: '2'
    type: byte
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1110, 290]
    rotation: 0
    state: enabled
- name: blocks_stream_to_vector_0
  id: blocks_stream_to_vector
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    num_items: CODEWORD_LENGTH
    type: byte
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1350, 300]
    rotation: 0
    state: enabled
- name: bbc_bbc_decoder_0
  id: bbc_bbc_decoder
  parameters:
    affinity: ''
    alias: ''
    checksum_length: CHECKSUM_BITS
    codeword_length: CODEWORD_LENGTH
    comment: Emits both messages.
    max_candidates: '256'
    max_steps: '5000000'
    maxoutbuf: '0'
    message_length: MESSAGE_LENGTH
    minoutbuf: '0'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [80, 570]
    rotation: 0
    state: enabled
- name: blocks_message_debug_0
  id: blocks_message_debug
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    en_uvec: 'True'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [610, 680]
    rotation: 0
    state: enabled
- name: blocks_null_sink_0
  id: blocks_null_sink
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    type: byte
    vlen: MESSAGE_LENGTH
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [610, 580]
    rotation: 0
    state: enabled

connections:
- [bbc_bbc_decoder_0, '0', blocks_null_sink_0, '0']
- [bbc_bbc_decoder_0, decoded, blocks_message_debug_0, print]
- [bbc_bbc_encoder_0, '0', blocks_vector_to_stream_0, '0']
- [bbc_bbc_encoder_1, '0', blocks_vector_to_stream_1, '0']
- [blocks_or_xx_0, '0', blocks_stream_to_vector_0, '0']
- [blocks_stream_to_vector_0, '0', bbc_bbc_decoder_0, '0']
- [blocks_vector_source_x_0, '0', bbc_bbc_encoder_0, '0']
- [blocks_vector_source_x_1, '0', bbc_bbc_encoder_1, '0']
- [blocks_vector_to_stream_0, '0', blocks_or_xx_0, '0']
- [blocks_vector_to_stream_1, '0', blocks_or_xx_0, '1']

metadata:
  file_format: 1
  grc_version: 3.10.9.2