Explore MATLAB source code curated for "DS-CDMA" with clean implementations, documentation, and examples.
Simulation of a DS-CDMA multi-user communication system using QPSK modulation in MATLAB, featuring multipath Rayleigh fading channels, additive white Gaussian noise (AWGN) channels, root raised cosine filtering, and detailed bit error rate (BER) performance analysis.
Implementation of MMSE algorithm for DS-CDMA systems featuring BER performance simulation curves across different SNR values, including code structure and signal processing workflows.
This project contains a functional MATLAB simulation of a RAKE receiver for Direct Sequence Code Division Multiple Access (DS-CDMA) systems, including executable source code (.m files) that has been successfully tested.
(1) Design a specific code division pilot-assisted channel estimation method for DS-CDMA systems. Implement both Equal Gain Combining (EGC) and Maximum Ratio Combining (MRC) techniques at the receiver. Perform Simulink simulations to measure BPSK bit error rate performance. Plot the relationship curves between bit SNR vs. channel estimation mean square error and bit SNR vs. BER. Explain the distinct physical implications of both combining schemes when BER reaches 0.01, including implementation considerations for pilot signal generation, correlation-based channel estimation, and combining weight calculations.
Comprehensive exploration of DS-CDMA fading channel functions, including multipath fading channels and fast fading channel implementations with MATLAB-based simulation insights.
5. In a three-path Rayleigh channel for Direct Sequence Spread Spectrum: (1) Design a specific code-division pilot-assisted channel estimation method for DS-CDMA with receivers employing Equal Gain Combining and Maximal Ratio Combining. Implement Simulink simulations to measure BPSK bit error rate performance, plot bit-to-noise ratio vs. channel estimation MSE curves, and plot bit SNR vs. BER curves. Explain the physical significance of the two combining schemes at BER=0.01. (2) Assuming frequency synchronization is achieved, design a specific single-dwell sliding correlation timing synchronization method for DS-CDMA. Implement Simulink simulation using custom S-Function code to analyze timing synchronization accuracy and plot bit SNR vs. acquisition probability curves. (3) Assuming timing synchronization is achieved, design a specific frequency synchronization method for DS-CDMA. Implement Simulink simulation using custom S-Function code to plot bit SNR vs. frequency synchronization error curves.
Design of a specific DS-CDMA code division pilot-assisted channel estimation method with receivers employing Equal Gain Combining and Maximum Ratio Combining. Simulink-based simulation implementation measuring BPSK bit error rate performance, plotting relationships between bit SNR and channel estimation mean square error, and between bit SNR and bit error rate.
Simulink Simulation Model of RAKE Receiver for DS-CDMA Systems featuring multipath signal processing and performance analysis capabilities