Multi-User Spread Spectrum Communication: Transmitter and Receiver Implementation

This project provides a MATLAB implementation of multi-user spread spectrum communication systems with fully functional transmitter and receiver components. The code is executable immediately without requiring any modifications. The implementation utilizes direct-sequence spread spectrum (DSSS) techniques where each user's data is multiplied by a unique spreading code (typically PN sequences) to enable multiple access communication.

In this MATLAB simulation, we develop a comprehensive multi-user spread spectrum communication system featuring both transmission and reception capabilities. Through spread spectrum technology, the program demonstrates how multiple users can simultaneously transmit data within the same frequency bandwidth. This technique employs code division multiple access (CDMA) principles where orthogonal spreading codes separate user signals. The implementation includes key modules for data generation, spreading modulation, channel simulation, despreading demodulation, and error rate calculation.

The program is designed for immediate execution without any modifications. By running the simulation, you can observe the complete spread spectrum communication process involving multiple users, including signal transmission, channel effects, and successful data recovery. The code structure includes configurable parameters for spreading factor, number of users, signal-to-noise ratio, and modulation schemes. This practical demonstration helps deepen understanding of multi-user spread spectrum communication principles and operational mechanisms.

I encourage you to execute this program and conduct further experiments by modifying parameters like spreading code length, user count, or channel conditions to explore system performance under various scenarios. This project serves as an excellent foundation for advanced research in wireless communication systems and spread spectrum technologies.