802.11b WiFi Simulation

This document presents a comprehensive MATLAB simulation framework for the 802.11b WiFi standard. The simulation enables detailed performance analysis of wireless network behavior through customizable parameter configurations. Key implementation aspects include: The simulation architecture incorporates physical layer components using MATLAB's Communications Toolbox, implementing Direct Sequence Spread Spectrum (DSSS) modulation with Complementary Code Keying (CCK) for data rates up to 11 Mbps. The framework models packet transmission with CRC error detection and implements CSMA/CA protocol for medium access control. Through programmable scenarios, users can evaluate network performance under varying conditions by adjusting parameters such as transmission power, signal-to-noise ratios, and channel characteristics. The simulation includes path loss models and interference sources to analyze network robustness. Performance metrics like bit error rate (BER), packet delivery ratio, and throughput are calculated using statistical analysis functions. The code structure employs object-oriented design with separate classes for transmitter, receiver, and channel models. Key functions include waveform generation, signal processing chains, and error rate calculation algorithms. This modular approach allows easy extension to test different modulation schemes (BPSK/QPSK) and data rates (1, 2, 5.5, 11 Mbps). This simulation framework provides valuable insights for optimizing network parameters and serves as an effective tool for designing efficient WiFi deployments through quantitative performance evaluation.