Simulation Models for Multipath Channels, Doppler Shift, Rayleigh and Rician Channels with QPSK Modulation/Demodulation and Interleaving Coding

This repository contains comprehensive simulation materials including multipath channel modeling, Doppler shift effects, Rayleigh and Rician channel simulations, QPSK modulation/demodulation implementations, and interleaving coding techniques. The implementations feature channel modeling using tapped delay lines for multipath effects, Doppler spectrum calculations for mobility scenarios, and Rayleigh/Rician distribution generators for fading characteristics. QPSK modulation employs constellation mapping with Gray coding, while demodulation includes coherent detection with phase recovery algorithms. Interleaving implementations feature block-based data reorganization for error correction enhancement. All code has been rigorously validated through comprehensive testing protocols, with supporting test documentation and graphical simulation results showcasing BER performance, constellation diagrams, and channel response characteristics. Additional detailed explanations regarding channel model parameters, modulation techniques, and practical application scenarios in wireless communication systems are available upon request for further technical discussion.