Implementation of QPSK Modulation and Demodulation on MATLAB Platform
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Resource Overview
Implementation of QPSK modulation and demodulation on MATLAB platform with graphical visualization of the working process and calculation of corresponding bit error rate performance metrics.
Detailed Documentation
This project implements Quadrature Phase Shift Keying (QPSK) modulation and demodulation technology on the MATLAB platform. The implementation includes graphical visualization of the entire signal processing workflow, from input bit stream generation to modulated signal transmission, channel simulation, demodulation process, and final bit error rate calculation. The system demonstrates constellation diagrams for both transmitted and received signals, allowing visual analysis of signal integrity and noise effects. Key MATLAB functions utilized include pskmod() and pskdemod() for core modulation/demodulation operations, awgn() for channel noise simulation, and berawgn() for theoretical bit error rate calculations. Performance metrics are computed by comparing original and recovered bit sequences, providing quantitative analysis of system reliability under various signal-to-noise ratio conditions.
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