LTE System-Level Simulation

Application Context: The simulator enables comprehensive performance evaluation of downlink shared channels in LTE systems for both SISO and MIMO configurations. It supports assessment of open-loop spatial multiplexing and transmit diversity transmission modes. The model is based on physical-layer post-equalization SINR and provides functionality for simulating pre-computed fading parameters that represent individual interference components. This architecture allows fading parameters to be pre-generated offline, significantly reducing computational complexity and improving runtime efficiency through optimized parameter caching. Key Technologies: The primary file for LTE link-level simulation is lte_sim_main.m, which contains the core simulation algorithm including channel modeling, signal processing, and performance metrics calculation. Simulations are typically executed through batch files such as lte_sim_launcher.m, which performs the following tasks: - Loads selected configuration files (refer to configuration parameters listed in Section 3), implementing a flexible parameter initialization system using MATLAB's configuration parsing capabilities. - Executes the main simulation file lte_sim_main.m, which contains the core simulation loop, channel modeling functions, and performance evaluation algorithms including SINR calculation and throughput measurement modules. The simulation architecture employs modular design with separate functions for channel generation, signal transmission, reception processing, and results analysis, ensuring maintainable and extensible code structure.