Spektrumanalysator-Software (Spectrum Analyzer Software)

Diese Software ist eine verbesserte Version des Spektrumanalysator-Software, einer Software, die ich habe zuvor entwickelt. In dieser Version habe ich mehr Steuerelemente integriert und die Benutzeroberfläche sowie das Layout der Software verbessert.

This software is an enhanced version of Spectrum Analyzer, a software I wrote previously. In this version, I incorporated more controls and improved UI and layout of the software.

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• MainClass starts the software, loads spectrum_analyzer.fxml, applies style.css, sets stage title to "Spectrum Analyzer", and displays 1200x800 scene
• SignalProcessor generates simulated spectrum data with 16384 bins, default frequency range 20 Hz to 1000 Hz
• SignalProcessor initializes SpectrumData, SignalClassifier, Demodulator, and uses ExecutorService for asynchronous data generation
• SignalProcessor sets frequency range via setFrequencyRange, updates minFreq, maxFreq, and regenerates data
• SignalProcessor sets analysis mode (FFT or Swept-Tuned) via setAnalysisMode and regenerates data
• SignalProcessor sets window function (Hanning, Blackman-Harris, Kaiser, Flat-Top, Gaussian) via setWindowFunction and regenerates data
• SignalProcessor sets demodulation type (None, AM, FM, PM, QAM, PSK, OFDM) via setDemodulationType and regenerates data
• SignalProcessor sets sweep speed via setSweepSpeed, scales amplitudes in Swept-Tuned mode, and regenerates data
• SignalProcessor generates simulated data with noise floor (-160 - 20 * log10(maxFreq/1000)) and Gaussian peaks for Wi-Fi (150 Hz, +100 dB), Bluetooth (2440 MHz, +80 dB), LTE (1800 MHz, +90 dB), 5G NR (3600 MHz, +85 dB), Zigbee (2425 MHz, +75 dB)
• SignalProcessor applies window function to amplitudes, generates random phases (0 to 2π), and demodulates if enabled
• SignalProcessor generates window function array in parallel using IntStream for Hanning, Blackman-Harris, Kaiser, Flat-Top, or Gaussian
• SignalProcessor computes modified Bessel function (besselI0) for Kaiser window
• SignalProcessor classifies signal type via SignalClassifier and provides frequency-specific classification
• SpectrumData stores amplitudes, phases, minFreq, maxFreq, and size (16384)
• SpectrumData updates data via update method and provides getters for amplitudes, phases, frequency range, and size
• Demodulator demodulates amplitudes based on type: AM (abs(amp) * cos(phase)), FM ((phase[i] - phase[i-1]) / 2π), PM (phase / 2π), QAM (sqrt(I^2 + Q^2)), PSK (quantized phase to π/4), OFDM (abs(amp) * cos(phase + random offset))
• Demodulator generates random phase offset (0 to π/8) for OFDM
• SignalClassifier identifies signal type based on peak frequency and amplitude: Bluetooth (2400–2480 MHz, >-100 dBm), Wi-Fi (100–200 Hz, >-80 dBm), LTE (700–2700 MHz, >-90 dBm), 5G NR (3500–3700 MHz, >-95 dBm), Zigbee (2400–2450 MHz, >-105 dBm), else Unknown
• SignalClassifier calculates confidence (90% if peak count < 5, else 70%) and returns signal type with percentage
• SpectrumCanvas renders spectrum plot with 1160x400 resolution, supports zoom (scroll), pan (drag), and marker addition (double-click)
• SpectrumCanvas sets dynamic range (default 160 dB), channel bandwidth (default 1000 Hz), channel count (default 1), log scale, display mode (Spectrum), grid visibility, and grid spacing
• SpectrumCanvas adds annotations at specified coordinates and clears them via clearAnnotations
• SpectrumCanvas resets zoom (zoomFactor = 1.0) and pan (offsetX = 0.0) via resetZoomPan
• SpectrumCanvas adds markers at specified frequency with amplitude and signal type, clears user-added markers
• SpectrumCanvas updates canvas by drawing spectrum or persistence plot, grid, channels, markers, and annotations
• SpectrumCanvas draws spectrum as yellow line plot, scaling x-axis (width / amplitudes.length) and y-axis (height / dynamicRange)
• SpectrumCanvas draws persistence plot as green heatmap, decaying buffer values (* 0.95) and adding amplitude contributions
• SpectrumCanvas draws grid with frequency and amplitude labels if gridVisible, using gridSpacing lines
• SpectrumCanvas draws red channel markers based on channelBandwidth and channelCount around center frequency
• SpectrumCanvas draws cyan markers with frequency and amplitude labels
• SpectrumCanvas draws white text annotations at specified coordinates
• SpectrumCanvas detects peaks (amplitude > neighbors and >-100 dBm) and adds them as Marker objects to metricsData
• SpectrumCanvas converts pixel x-coordinate to frequency based on zoom and offset
• SpectrumCanvas computes channel power as average power (dBm) within main channel bandwidth
• SpectrumCanvas computes ACPR as difference between main and adjacent channel power
• DemodCanvas renders demodulated signal as yellow waveform on 1160x150 canvas, scaling x-axis (width / amplitudes.length) and y-axis (height / 400)
• DemodCanvas draws dark gray center line
• Marker represents marker or peak with type, frequency, amplitude, and signal type
• Annotation represents text annotation with text and x, y coordinates
• SpectrumAnalyzerController initializes GUI, SignalProcessor, SpectrumCanvas, and DemodCanvas
• SpectrumAnalyzerController sets up UI listeners for frequency slider (20 Hz to 50 GHz), dynamic range slider (100–200 dB), sweep speed slider (0.1–10), display mode combo box (Spectrum), analysis mode combo box (FFT, Swept-Tuned), window combo box, demodulation combo box, channel bandwidth field, channel count field (1–5), log scale toggle, export button, reset button, zoom/pan reset button, marker buttons, grid toggle, grid spacing slider, and annotation button
• SpectrumAnalyzerController validates channel bandwidth (>0) and channel count (1–5) inputs
• SpectrumAnalyzerController updates channel power, ACPR, and signal type labels in real-time
• SpectrumAnalyzerController updates window info label with sidelobe and resolution details for selected window function
• SpectrumAnalyzerController exports channel power and ACPR to power_report.csv
• SpectrumAnalyzerController resets settings to defaults: frequency 1000 Hz, dynamic range 160 dB, sweep speed 1.0, FFT mode, Hanning window, no demodulation, channel bandwidth 1000 Hz, channel count 1, log scale off, grid on, grid spacing 10
• SpectrumAnalyzerController resets zoom and pan via resetZoomPan
• SpectrumAnalyzerController adds marker at center frequency
• SpectrumAnalyzerController clears all markers
• SpectrumAnalyzerController adds annotation at canvas center if text is provided
• SpectrumAnalyzerController displays alerts for success or error messages
• SpectrumAnalyzerController uses AnimationTimer to continuously update SpectrumCanvas, DemodCanvas, and metrics labels

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