文档介绍：
基于软件无线电平台的 OFDM 系统的研究
甘辉,罗涛**
(北京邮电大学通信与信息工程学院,北京 100876)
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摘要:最近三十多年来,无线移动通信领域发展迅速,从模拟无线电、数字无线电(窄带)、
数字无线电(宽带),现在已经进入了第四代软件无线电时代。目前使用最广泛的软件无线
电平台是 GNURadio 和 USRP 的组合。正交频分复用 OFDM 是一种特殊的多载波调制方式。
早在 20 世纪 50 年代,OFDM 的思想就已经被提出了,但是由于硬件难以实现才一直没有
发展起来,直到 90 年代才有了足够成熟的标准。现在 OFDM 已经是 4G 标准的核心技术,
在移动通信系统的应用势在必行。本文在 GNURadio 和 USRP 平台上实现 OFDM 收发系统,
并对实际测量结果进行分析。
关键词:软件无线电;GNURadio;USRP;正交频分复用
中图分类号:
15
Research on OFDM System Based on Software Defined
Radio
GAN Hui, LUO Tao
(School of Information munication Engineering,Beijing University of Posts and
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munications,Beijing 100876)
Abstract: In the last thirty years, wireless munications have gone through rapid
development, from analog radio to digital radio (narrowband) and digital radio (broadband) .
Now we've entered the fourth generation of software-defined radio(SDR) era. Currently, the most
widely used software radio platform is bination of GNURadio and
frequency division multiplexing (OFDM) is a special multi-carrier modulation. OFDM has been
proposed in the 1950s , but it has not been developed due to hardware's difficulties. Until the
1990s, there are relevant standards. OFDM is already the core technology in 4G standard and it's
application in munication system is paper used GNURadio and USRP
platform to realize an OFDM transceiver syste