VHDL + MATLAB: I/Q Signal Reader/Writer Testbench

This repository provides a practical testbench setup to simulate I/Q (In-phase and Quadrature) signal handling between VHDL and MATLAB.
It includes:

• 📂 VHDL: File-based I/Q signal reader and writer with generic configurability.
• 📂 Matlab: Scripts to load and save I/Q data as complex arrays compatible with the VHDL format.

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📁 Folder Structure

/VHDL
├── file_reader.vhd -- Reads I/Q from text (I0, Q0, I1, Q1...)
├── file_writer.vhd -- Writes I/Q to text (one value per line)
└── tb_reader_writer.vhd -- Testbench connecting reader & writer

/Matlab
├── read_complex_from_txt.m -- Load text file into complex array
└── write_complex_to_txt.m -- Save complex array to text file

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🔄 Workflow Overview

1. Write I/Q data in MATLAB using write_complex_to_txt.m
2. Read it in VHDL with file_reader.vhd
3. Process it or loop it through your DUT
4. Write back in VHDL using file_writer.vhd
5. Read results in MATLAB using read_complex_from_txt.m

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⚙️ Features

• Generic DATA_WIDTH and file paths in VHDL
• Fully synthesizable VHDL (suitable for simulation)
• Interval-based reading (e.g., read every N clock cycles)
• MATLAB-compatible text format (I followed by Q line-by-line)

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📌 Example Format (text file)

100
-50
200
-25

→ Represents:

[100 - 50i, 200 - 25i]  

📬 Contact

Questions, improvements, or contributions are welcome! This setup is ideal for DSP testbenches, RF simulations, or I/Q streaming verification.

Let me know if you want to add:

• License
• Screenshots (e.g., waveform or MATLAB plots)
• A badge for simulator/tool support

This version keeps it simple but highly useful for engineers and students alike 🚀.

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👤 Authors

• Milad Mohammadi.B – VHDL and MATLAB design, simulation setup
• ChatGPT (OpenAI) – Assisted with code generation, explanation, and documentation