BPSK Communication System Simulation using MATLAB

Overview

This project demonstrates the implementation of a Binary Phase Shift Keying (BPSK) digital communication system using MATLAB.

The system performs end-to-end communication by converting a text message into binary data, modulating it using BPSK, transmitting it through a noisy channel, recovering the received signal, and evaluating system performance using Bit Error Rate (BER).

---

Features

• Text to binary conversion
• BPSK modulation
• Additive White Gaussian Noise (AWGN) channel simulation
• Signal demodulation and bit recovery
• Message reconstruction
• Bit Error Rate (BER) calculation
• BER analysis under different noise levels
• Signal visualization using MATLAB plots

---

System Flow

Text Message

↓

Binary Conversion

↓

BPSK Modulation

↓

Noise Channel (AWGN)

↓

Demodulation

↓

Recovered Bits

↓

Recovered Message

↓

BER Analysis

---

Results

BPSK Modulation and Transmission

BER Performance

Bit Recovery

Transmission Process

• Original binary data
• BPSK modulated signal
• Received noisy signal

Demodulation Results

• Comparison between original bits and recovered bits
• Error detection and BER calculation

Performance Analysis

BER is evaluated for different noise levels to study the robustness of the communication system.

---

Technologies Used

• MATLAB
• Digital Communication Concepts
• BPSK Modulation
• Signal Processing

---

Future Improvements

• QPSK implementation
• Theoretical vs simulated BER comparison
• Constellation diagrams
• GUI-based visualization
• SNR-based performance analysis

---

Author

Beema Shahana Shiyad

B.Tech Electronics and Communication Engineering