基于互信息的链路级系统级接口的研究

Wireless communication system simulation is very important in the area of modern wireless technology research. It is commonly agreed that a system level simulation is the most important way to evaluate a communication system's performance. However, the heavy computation cost of system simulation with high resolution and long duration would lead to very long simulation time. Therefore, a separate link and system level simulation are needed for network performance evaluation. Then the mapping method to interconnect the two simulators is essential and has to be defined carefully. This L2S mapping method is so important that it affects the efficiency of the system simulation.The paper firstly covers the basic principle of the MI-ESM method, shows how to map the sequence of varying SINR to a single value that is strongly correlated with the actual BLER and then how to get the prediction BLER from the effective SINR. The paper focuses on the MI-ESM application in the OFDM system and the MI-based Link Quality Model which improves the MI-ESM and simplifies the realization of the L2S interface. The paper finishes the design of the mutual information based link level to system level interface and realizes it with simulation, including the performance of the L2S interface and some corresponding simulation results.