复杂电磁环境下IEEE802.11g系统中OFDM信号仿真

Simulation of OFDM Signal in IEEE802.11g System under Complex Electromagnetic Environment

摘要:

为了更好地研究动态多场景下传播环境对OFDM系统中信号的影响，对复杂环境下IEEE802.11g中OFDM信号进行了仿真。首先，搭建了高速移动、多径传播以及同频干扰等因素对OFDM信号传输影响的数学模型；其次，在介绍了OFDM发射信号和接收模型的基础上，分析了IEEE802.11g设备面临的复杂信号环境；最后，仿真并分析了复杂环境对OFDM通信系统性能的影响。结果表明高速移动、多径传播以及同频干扰等复杂环境会引起OFDM系统性能的恶化。模型不仅可以研究复杂环境对OFDM信号性能的影响，还可以作为下一步OFDM系统性能提升的验证平台，具有一定的实用性。

Abstract:

In order to better study the influence of propagation environment on the signal in OFDM system in dynamic multi-scenario, the OFDM signal in IEEE802.11g under complex environment is simulated. First of all, a mathematical model of the influence of high-speed mobile, multipath propagation and co-channel interference on OFDM signal transmission is set up. Secondly, based on the introduction of the OFDM transmission signal and reception model, the complex signals that IEEE802.11g equipment faces Environment. Finally, the influence of complex environment on the performance of OFDM communication system is simulated and analyzed. The results show that the complex environment of high-speed mobile, multipath propagation and co-channel interference will cause the degradation of OFDM system performance. The model not only can study the influence of complex environment on the performance of OFDM signal, but also can be used as the verification platform for the performance improvement of OFDM system in the future, which is of certain practicality.