MMO-Style Spectrum Analyzer

Three independently fading signals across a simulated 1 MHz RF channel demonstrate the Spectrum Analyzer's MMO Mode with received-power health bars, leveling, damage effects, enemy classes, and a strongest-signal boss.

Author GNU Radio World
Category Spectrum Analysis
Blocks 21
Connections 15
File spectrum-analysis/mmo_style_spectrum_analyzer.grc

Press Load to open this flowgraph in an editor embedded above, then ▶ to run it. Nothing is downloaded until you do.

Open in the full editor ▶ Download the .grc

Blocks used

Block	Module	Used
Variable	`GNU Radio`	4
Multiply Const	`GNU Radio`	2
Add	`GNU Radio`	1
Constellation Modulator	`GNU Radio`	1
Constellation Object	`GNU Radio`	1
GUI Layout	`GNU Radio`	1
JS Block	`GNU Radio`	1
Noise Source	`GNU Radio`	1
Note	`GNU Radio`	1
OFDM Transmitter	`GNU Radio`	1
Random Uniform Source	`GNU Radio`	1
Rotator	`GNU Radio`	1
Signal Source	`GNU Radio`	1
Spectrum Analyzer	`GNU Radio`	1
Stream to Tagged Stream	`GNU Radio`	1
Throttle	`GNU Radio`	1
Vector Source	`GNU Radio`	1

Notes in this flowgraph

A simulated 1 MHz channel centered at 915 MHz Left: narrow carrier at -300 kHz Center: pulse-shaped QPSK, 8 samples/symbol Right: QPSK OFDM at +300 kHz, 256-point FFT with 52 active carriers Each signal slowly eases toward an independent random power level every 3-7 seconds, making health changes and damage effects easy to see. Low-level receiver noise gives the automatic detector a realistic floor to learn.

Flowgraph source

spectrum-analysis/mmo_style_spectrum_analyzer.grc

options:
    parameters:
        author: GNU Radio World
        comment: ''
        copyright: ''
        description: Three independently fading signals across a simulated 1 MHz RF channel demonstrate the Spectrum Analyzer's MMO Mode with received-power health bars, leveling, damage effects, enemy classes, and a strongest-signal boss.
        generate_options: qt_gui
        id: MMO_Style_Spectrum_Analyzer
        title: MMO-Style Spectrum Analyzer
    states:
        coordinate: [10, 10]
        rotation: 0
        state: enabled
blocks:
-   name: center_freq
    id: variable
    parameters:
        comment: ''
        value: '915000000'
    states:
        coordinate: [600, 10]
        rotation: 0
        state: enabled
-   name: ofdm_offset
    id: variable
    parameters:
        comment: ''
        value: '300000'
    states:
        coordinate: [770, 10]
        rotation: 0
        state: enabled
-   name: samp_rate
    id: variable
    parameters:
        comment: ''
        value: '1000000'
    states:
        coordinate: [950, 10]
        rotation: 0
        state: enabled
-   name: tone_offset
    id: variable
    parameters:
        comment: ''
        value: '-300000'
    states:
        coordinate: [1120, 10]
        rotation: 0
        state: enabled
-   name: analyzer
    id: wasm_spectrum_analyzer_sink
    parameters:
        affinity: ''
        alias: ''
        average: '0.2'
        center_freq: center_freq
        comment: ''
        db_per_div: '10'
        fftsize: '8192'
        level_offset_db: '0'
        level_unit: dBFS
        mmo_mode: 'True'
        name: Three-Signal Spectrum
        reference_level: '0'
        samp_rate: samp_rate
        trace_mode: average
        type: complex
        update_time: '0.1'
        wintype: window.WIN_BLACKMAN_hARRIS
    states:
        coordinate: [1390, 1110]
        rotation: 0
        state: enabled
-   name: channel_sum
    id: blocks_add_xx
    parameters:
        affinity: ''
        alias: ''
        comment: ''
        maxoutbuf: '0'
        minoutbuf: '0'
        num_inputs: '4'
        type: complex
        vlen: '1'
    states:
        coordinate: [820, 1170]
        rotation: 0
        state: enabled
-   name: channel_throttle
    id: blocks_throttle2
    parameters:
        affinity: ''
        alias: ''
        comment: ''
        ignoretag: 'True'
        limit: time
        maximum: '0.02'
        maxoutbuf: '0'
        minoutbuf: '0'
        samples_per_second: samp_rate
        type: complex
        vlen: '1'
    states:
        coordinate: [1060, 1190]
        rotation: 0
        state: enabled
-   name: gui_layout
    id: wasm_gui_layout
    parameters:
        affinity: ''
        alias: ''
        columns: '12'
        comment: ''
        layout: '{"analyzer":[0,0,12,8]}'
        row_height: '60'
    states:
        coordinate: [310, 10]
        rotation: 0
        state: enabled
-   name: ofdm_frequency_shift
    id: blocks_rotator_cc
    parameters:
        affinity: ''
        alias: ''
        comment: ''
        maxoutbuf: '0'
        minoutbuf: '0'
        phase_inc: 2*math.pi*ofdm_offset/samp_rate
        tag_inc_update: 'False'
    states:
        coordinate: [100, 1410]
        rotation: 0
        state: enabled
-   name: ofdm_level
    id: blocks_multiply_const_vxx
    parameters:
        affinity: ''
        alias: ''
        comment: ''
        const: '0.2'
        maxoutbuf: '0'
        minoutbuf: '0'
        mode: scalar
        type: complex
        vlen: '1'
    states:
        coordinate: [1090, 720]
        rotation: 0
        state: enabled
-   name: ofdm_packet_tagger
    id: blocks_stream_to_tagged_stream
    parameters:
        affinity: ''
        alias: ''
        comment: ''
        len_tag_key: length
        maxoutbuf: '0'
        minoutbuf: '0'
        packet_len: '96'
        type: byte
        vlen: '1'
    states:
        coordinate: [340, 720]
        rotation: 0
        state: enabled
-   name: ofdm_payload
    id: blocks_vector_source_x
    parameters:
        affinity: ''
        alias: ''
        comment: ''
        maxoutbuf: '0'
        minoutbuf: '0'
        repeat: 'True'
        tags: '[]'
        type: byte
        vector: '[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95]'
        vlen: '1'
    states:
        coordinate: [10, 710]
        rotation: 0
        state: enabled
-   name: ofdm_transmitter
    id: digital_ofdm_tx
    parameters:
        affinity: ''
        alias: ''
        comment: ''
        cp_len: '64'
        fft_len: '256'
        header_mod: '"BPSK"'
        log: 'False'
        maxoutbuf: '0'
        minoutbuf: '0'
        occupied_carriers: ()
        packet_len_key: length
        payload_mod: '"QPSK"'
        pilot_carriers: ()
        pilot_symbols: ()
        rolloff: '0'
        scramble_bits: 'True'
        sync_word1: ()
        sync_word2: ()
    states:
        coordinate: [720, 610]
        rotation: 0
        state: enabled
-   name: overview
    id: note
    parameters:
        affinity: ''
        alias: ''
        comment: ''
        note: "A simulated 1 MHz channel centered at 915 MHz\n\nLeft: narrow carrier at -300 kHz\nCenter: pulse-shaped QPSK, 8 samples/symbol\nRight: QPSK OFDM at +300 kHz, 256-point FFT with 52 active carriers\n\nEach signal slowly eases toward an independent random power level every 3-7 seconds, making health changes and damage effects easy to see. Low-level receiver noise gives the automatic detector a realistic floor to learn."
    states:
        coordinate: [1290, 10]
        rotation: 0
        state: enabled
-   name: qpsk_constellation
    id: variable_constellation
    parameters:
        affinity: ''
        alias: ''
        comment: ''
        const_points: '[-1-1j, -1+1j, 1+1j, 1-1j]'
        dims: '1'
        normalization: digital.constellation.AMPLITUDE_NORMALIZATION
        npwr: '1'
        precision: '8'
        rot_sym: '4'
        soft_dec_lut: None
        sym_map: '[0, 1, 3, 2]'
        type: qpsk
    states:
        coordinate: [10, 370]
        rotation: 0
        state: enabled
-   name: qpsk_data
    id: analog_random_uniform_source_x
    parameters:
        affinity: ''
        alias: ''
        comment: ''
        maximum: '255'
        maxoutbuf: '0'
        minimum: '0'
        minoutbuf: '0'
        seed: '23'
        type: byte
    states:
        coordinate: [720, 930]
        rotation: 0
        state: enabled
-   name: qpsk_level
    id: blocks_multiply_const_vxx
    parameters:
        affinity: ''
        alias: ''
        comment: ''
        const: '0.22'
        maxoutbuf: '0'
        minoutbuf: '0'
        mode: scalar
        type: complex
        vlen: '1'
    states:
        coordinate: [100, 1310]
        rotation: 0
        state: enabled
-   name: qpsk_modulator
    id: digital_constellation_modulator
    parameters:
        affinity: ''
        alias: ''
        comment: ''
        constellation: qpsk_constellation
        differential: 'False'
        excess_bw: '0.35'
        log: 'False'
        maxoutbuf: '0'
        minoutbuf: '0'
        samples_per_symbol: '8'
        truncate: 'False'
        verbose: 'False'
    states:
        coordinate: [1090, 890]
        rotation: 0
        state: enabled
-   name: random_power_fades
    id: wasm_js_block
    parameters:
        _js_io: '{"decim":1,"doc":"Slow, independent random power changes for the three signals in the MMO spectrum demo.","general":false,"hasStart":true,"hasStop":false,"history":1,"inputs":[{"dtype":"complex","vlen":1},{"dtype":"complex","vlen":1},{"dtype":"complex","vlen":1}],"interp":1,"label":"Random Power Fades","numericParams":["sample_rate","min_gain","max_gain"],"outputMultiple":0,"outputs":[{"dtype":"complex","vlen":1},{"dtype":"complex","vlen":1},{"dtype":"complex","vlen":1}],"overridesForecast":false,"params":[["sample_rate",1000000],["min_gain",0.25],["max_gain",1.3]],"relativeRate":1}'
        _js_source: ''
        _source_code: "// Give each signal its own smooth, deterministic pseudo-random power envelope.\ngr.export({\n  label: 'Random Power Fades',\n  doc: 'Slow, independent random power changes for the three signals in the MMO spectrum demo.',\n  inputs: ['complex', 'complex', 'complex'],\n  outputs: ['complex', 'complex', 'complex'],\n  params: { sample_rate: 1000000, min_gain: 0.25, max_gain: 1.3 },\n\n  start() {\n    this.rng = [0x13579bdf, 0x2468ace1, 0x10203040];\n    this.gain = [1, 0.85, 1.15];\n    this.step = [0, 0, 0];\n    this.remaining = [0, 0, 0];\n  },\n\n  nextRandom(port) {\n    this.rng[port] = (Math.imul(this.rng[port], 1664525) + 1013904223) >>> 0;\n    return this.rng[port] / 4294967296;\n  },\n\n  chooseTarget(port) {\n    const low = Math.min(this.min_gain, this.max_gain);\n    const high = Math.max(this.min_gain, this.max_gain);\n    const target = low + (high - low) * this.nextRandom(port);\n    const seconds = 3 + 4 * this.nextRandom(port);\n    const samples = Math.max(1, Math.round(seconds * Math.max(1, this.sample_rate)));\n    this.step[port] = (target - this.gain[port]) / samples;\n    this.remaining[port] = samples;\n  },\n\n  work(nout, input, output) {\n    for (let port = 0; port < 3; port++) {\n      const source = input[port];\n      const destination = output[port];\n      let gain = this.gain[port];\n      let step = this.step[port];\n      let remaining = this.remaining[port];\n\n      for (let item = 0; item < nout; item++) {\n        if (remaining <= 0) {\n          this.gain[port] = gain;\n          this.chooseTarget(port);\n          step = this.step[port];\n          remaining = this.remaining[port];\n        }\n        const offset = item * 2;\n        destination[offset] = source[offset] * gain;\n        destination[offset + 1] = source[offset + 1] * gain;\n        gain += step;\n        remaining--;\n      }\n\n      this.gain[port] = gain;\n      this.step[port] = step;\n      this.remaining[port] = remaining;\n    }\n    return nout;\n  },\n});\n"
        affinity: ''
        alias: ''
        comment: ''
        max_gain: '1.3'
        min_gain: '0.25'
        sample_rate: samp_rate
    states:
        coordinate: [460, 1170]
        rotation: 0
        state: enabled
-   name: receiver_noise
    id: analog_noise_source_x
    parameters:
        affinity: ''
        alias: ''
        amp: '0.002'
        comment: ''
        maxoutbuf: '0'
        minoutbuf: '0'
        noise_type: analog.GR_GAUSSIAN
        seed: '7'
        type: complex
    states:
        coordinate: [460, 1330]
        rotation: 0
        state: enabled
-   name: tone
    id: analog_sig_source_x
    parameters:
        affinity: ''
        alias: ''
        amp: '0.3'
        comment: ''
        freq: tone_offset
        maxoutbuf: '0'
        minoutbuf: '0'
        offset: '0'
        phase: '0'
        samp_rate: samp_rate
        type: complex
        waveform: analog.GR_COS_WAVE
    states:
        coordinate: [100, 1130]
        rotation: 0
        state: enabled
connections:
- [channel_sum, '0', channel_throttle, '0']
- [channel_throttle, '0', analyzer, '0']
- [ofdm_frequency_shift, '0', random_power_fades, '2']
- [ofdm_level, '0', ofdm_frequency_shift, '0']
- [ofdm_packet_tagger, '0', ofdm_transmitter, '0']
- [ofdm_payload, '0', ofdm_packet_tagger, '0']
- [ofdm_transmitter, '0', ofdm_level, '0']
- [qpsk_data, '0', qpsk_modulator, '0']
- [qpsk_level, '0', random_power_fades, '1']
- [qpsk_modulator, '0', qpsk_level, '0']
- [random_power_fades, '0', channel_sum, '0']
- [random_power_fades, '1', channel_sum, '1']
- [random_power_fades, '2', channel_sum, '2']
- [receiver_noise, '0', channel_sum, '3']
- [tone, '0', random_power_fades, '0']
metadata:
    file_format: 1
    grc_version: 3.11.0.0