正交频分复用技术系统仿真及其应用

正交频分复用（OFDM）技术能够有效地克服频率选择性衰落，因此目前在宽带无线通信中被广泛地应用。该文首先介绍了正交频分复用技术的基本原理，分别对其发射机和接收机的具体结构进行了详细描述。通过对正交频分系统结构的分析，建立了正交频分复用全系统的数学仿真模型，并采用Matlab对系统进行了计算机仿真运算，分析了该系统在不同的信道条件和调制体制下，系统的误码率对比特性，并以具体图像作为实例，以更加直观的角度，反映出正交频分复用系统在不同条件下的性能差异。

System Simulation and Application of Orthogonal Frequency Division Multiplex

Orthogonal Frequency Division Multiplex(OFDM) has been applied broadly in wideband wireless communication systems because it has ability in anti frequency selective shading.The basic principles of OFDM are described and then the schemes of transmitter and receiver are given in detail.According to the system architecture analyzsis,it builds the OFDM system model and simulations model through Matlab tools.The different computer simulation results and BER can be got at different channel conditions and modulation modes.A specific example is given and a more intuitionistic result can be got from this example.The simulation results show that OFDM system has a good quality in anti channel interference.