MATLAB Implementation of 4QPSK Encoding/Decoding with AWGN Channel Simulation
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Resource Overview
This example demonstrates 4QPSK modulation/demodulation implementation in MATLAB, including transmission through an AWGN channel. Using Monte Carlo simulation methodology, it calculates bit error rate performance and generates corresponding performance curves. Suitable for algorithm research and academic coursework, featuring practical code implementation with key functions like pskmod(), pskdemod(), and awgn().
Detailed Documentation
This example implements 4QPSK (Quadrature Phase Shift Keying) encoding and decoding with AWGN channel simulation using MATLAB. The implementation employs Monte Carlo simulation methodology to obtain bit error rate performance metrics and plot corresponding performance curves. The code structure includes signal generation using random bit streams, QPSK modulation with constellation mapping, AWGN channel impairment simulation with configurable SNR levels, and coherent demodulation with error counting. This practical example serves both algorithm research and educational purposes, providing insights into digital communication system implementation with clear modular structure separating transmitter, channel, and receiver components. Key MATLAB functions utilized include pskmod() for modulation, pskdemod() for detection, and awgn() for channel noise addition.
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