MATLAB Simulation of CDMA Communication Systems
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Conducting CDMA simulations using MATLAB enables comprehensive analysis of Bit Error Rate (BER) performance under different Signal-to-Noise Ratio (SNR) conditions. The simulation models the complete CDMA communication chain, including signal generation using PN sequences, Walsh code spreading for multiple access, AWGN channel modeling with adjustable SNR parameters, and BER calculation through correlation-based detection. By systematically varying SNR values and observing corresponding BER changes, researchers can quantitatively evaluate CDMA system robustness. The MATLAB implementation typically employs key functions like walshcode() for orthogonal spreading, awgn() for channel noise injection, and biterr() for error rate computation. Further extensions can investigate additional performance factors such as near-far effects, power control algorithms, and multi-path fading scenarios through modified code structures.
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