📡 RTL-SDR Signal Analyzer & Jamming Detector

A real-time spectrum analyzer and signal detection tool leveraging RTL-SDR hardware for RF monitoring and jamming detection.

Features • Installation • Usage • Configuration • Contributing

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✨ Features

• 📊 Real-time Visualization: Advanced spectrum analysis with waterfall display
• 🔍 Smart Detection: Automatic signal anomaly and jamming detection
• 📈 Dynamic Analysis: Adaptive baseline calculation and threshold adjustment
• ⚙️ Flexible Configuration: Fully customizable detection parameters
• 🌐 Network Support: Built-in RTL-TCP compatibility for remote operation

🚀 Installation

Prerequisites

Before you begin, ensure you have:

• Python 3.8 or newer
• RTL-SDR hardware
• Active RTL-TCP server (docker-compose.yml)

Setup

# Clone the repository
git clone https://github.com/geeknik/rtl-sdr-analyzer.git
cd rtl-sdr-analyzer

# Install required packages
pip install -r requirements.txt

💻 Usage

1. Start the RTL-TCP server:

cd docker
docker-compose up -d

2. Launch the analyzer:

python scripts/run_analyzer.py --freq 915e6 --sample-rate 2.048e6

Command Line Options

Option	Description	Default
--config	Path to configuration file	None
--host	RTL-TCP server host	192.168.31.34
--port	RTL-TCP server port	1234
--freq	Center frequency (Hz)	915e6
--sample-rate	Sample rate (Hz)	2.048e6
--fft-size	FFT size	2048
--power-threshold	Signal power threshold (dB)	-70
--bandwidth-threshold	Minimum signal bandwidth (Hz)	100000
--z-score-threshold	Statistical deviation threshold	1.5
--detection-window	Analysis window (samples)	5
--min-duration	Minimum event duration (seconds)	0.1
--test-mode	Enable test mode	false
--waterfall-length	Waterfall display length	50
--update-interval	Display update interval (ms)	50

Configuration File

You can alternatively run it with a YAML configuration file:

python scripts/run_analyzer.py --config config.yml

Example config.yml:

rtl_tcp:
  host: "192.168.31.34"
  port: 1234

receiver:
  frequency: 98000000  # 98 MHz
  sample_rate: 2048000  # 2.048 MHz
  fft_size: 2048

detector:
  power_threshold: -70
  bandwidth_threshold: 100000  # 100 kHz
  z_score_threshold: 1.5
  detection_window: 5
  min_duration: 0.1
  test_mode: false

display:
  waterfall_length: 50
  update_interval: 50  # milliseconds

📊 Signal Analysis Examples

Walkie-Talkie Transmission (446 MHz)

Spectrogram showing distinct signal patterns during walkie-talkie transmission at 446 MHz

Common Signal Patterns

• 📱 GSM/LTE: Characteristic wide-band signals
• 📻 FM Radio: Strong, stable signals in the 88-108 MHz range
• 🛜 Wi-Fi: Periodic bursts in the 2.4/5 GHz bands
• 🎮 RF Remote Controls: Brief, narrow-band transmissions

🤝 Contributing

We welcome contributions! To contribute:

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

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Developed with ❤️ by RF enthusiasts

Report Bug • Request Feature