Complete QPSK Modulation and Demodulation Source Code with Detailed Implementation

This repository contains detailed source code for complete QPSK modulation and demodulation implementation. The code thoroughly explains each step of the QPSK process, from baseband signal generation to demodulator implementation. We provide clear code examples with comprehensive comments, enabling readers to fully understand the complete digital communication chain. The implementation includes key components such as bit-to-symbol mapping using Gray coding, quadrature carrier modulation with cosine and sine waveforms, and coherent demodulation with phase recovery mechanisms. Whether you're a beginner exploring digital communications or an experienced developer working on wireless systems, this source code offers an in-depth opportunity to understand QPSK principles and practical implementation techniques. The code demonstrates real-world considerations including signal upsampling, pulse shaping with raised-cosine filters, and Additive White Gaussian Noise (AWGN) channel simulation. Through this implementation, you'll gain solid understanding of QPSK modulation-demodulation theory and hands-on coding approaches for building robust digital communication systems.