Power Spectral Density and Constellation Diagrams of QPSK Modulation with Rectangular and Root Raised Cosine Pulses under Different SNR Channel Conditions

MATLAB implementation for analyzing power spectral density and constellation diagrams of QPSK modulation using rectangular and root raised cosine pulses across various signal-to-noise ratio (SNR) channels. The code includes pulse shaping techniques, modulation/demodulation algorithms, and SNR simulation modules. Simply execute the main function to generate all results.