正交频分复用通信系统设计及性能研究

Design and performance research of orthogonal frequency division multiplexing communication system

正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)属于一类多载波宽带数字调制技术,它抵御多径干预的实力较强,并且具有频宽使用比率较高等优势,故适用于快速传播的无线通信体系。解析OFDM这一技术的完成机理,以MATLAB软件为实验平台,对OFDM的输送特性实施模拟,并对相关结论进行解析。由于其频谱使用比率较高、成本较低等因素受到大家的普遍重视。与此同时,OFDM还属于第4代移动通信的关键技术。研究OFDM系统的性能,以MATLAB软件为平台进行仿真,可以更好地判断设计系统的性能,为构建新系统提供合理的解决方案。利用MATLAB语言来实现OFDM传输系统中的计算机仿真参考设计程序,使用了3种调制方式(BPSK,QPSK,16QAM)对OFDM系统的性能进行仿真,并对仿真结果进行分析。

Orthogonal F requency Division Multiplexing(OFDM)belongs to a class of multi-carrier broadband digital modulation technology.It has strong resistance to multipath interference and has the advantage of high bandwidth utilization ratio,making it suitable for fast propagation wireless communication systems.Analyze the completion mechanism of OFDM technology,simulate the conveying characteristics of OFDM using MATLAB software as the experimental platform,and analyze the relevant conclusions.Due to its high spectral utilization ratio and low cost,it has received widespread attention.At the same time,OFDM is also a key technology in 4th generation mobile communica tion.Studying the performance of OFDM systems and simulating them using MATLAB sof tware can better evaluate the performance of the designed system and provide reasona ble solutions for building new systems.Using MATLAB language to implement a computer simulation reference design program for OFDM transmission systems,three mod ulation methods(BPSK,QPSK,16QAM)were used to simulate the performance of the OF DM system,and the simulation results were analyzed.