Overview
Français
ABSTRACT
The OFDM (Orthogonal Frequency Division Multiplex) is used in wireless and cellular networks as well as in digital television. Its function is to transmit parallel data on a significant number of subcarriers. In this article we explain how such transmission is effected simply through Fourier transforms and how orthogonality between the subcarriers is achieved. We not only review the advantages of the OFDM but also the issues it raises in radio systems as well as the techniques which allow us to address them. Finally, we briefly present the OFDM parameterization for various radio systems.
Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.
Read the articleAUTHOR
-
Xavier LAGRANGE: Professor - Télécom Bretagne
INTRODUCTION
OFDM (Orthogonal Frequency Division Multiplex) is used in wireless and cellular networks, and for digital television. It consists in transmitting data in parallel over a very large number of subcarriers. This treatise shows how such transmission is simply achieved using Fourier transforms, and how orthogonality between subcarriers is obtained. It discusses the advantages and problems of OFDM in radio systems, and techniques for compensating for them. Finally, it briefly explains how to set up OFDM for different radio systems.
The Ultimate Scientific and Technical Reference
KEYWORDS
| | | | | | | radio transmission | cellular networks | wireless networks | digital television
This article is included in
Networks and Telecommunications
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
OFDM transmission principle
OFDM in a nutshell
Bibliography
The Ultimate Scientific and Technical Reference
