摘要
在无线通信系统中,存在着严重的频率选择性衰落、快衰落和慢衰落,以及各种噪声的干扰和多径传播下的码间串扰等问题.为了解决这些问题,详细研究了正交频分复用(OFDM)技术,介绍了OFDM技术的基本原理及系统的实现方法,并结合数字通信系统的相关技术以及OFDM系统的典型模型,设计并仿真了一个基带OFDM系统,给出了仿真结果,并进行了系统性能分析.
There are some severe problems in wireless communication systems, such as frequency selective fading, fast fading and slow fading, various noise interferences and ICIs （intereode interferences） in multipath transmission channel. To resolves these problems, the OFDM technique is studied in detail, as well as its basic principle and the implementation of OFDM system. Then, a baseband OFDM system is designed and simulated on the basis of a typical model of OFDM system and relevant techniques of digital communication. The simulation results are given with an analysis made to its performance.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第2期201-204,共4页
Journal of Northeastern University(Natural Science)
基金
国家高技术研究发展计划项目(2002AA784030)
关键词
无线通信
多载波
正交频分复用
离散傅立叶变换
系统仿真
wireless communication
multi-carrier
OFDM （orthogonal frequency-dividing multiplexing）
DFT（discrete Fourier transform）
system simulation
