OFDM多载波技术是宽带无线传输技术发展的方向,不仅在数字电视传输方面被多数国家采纳,而且已成为新一代(4G)移动通信和宽带无线局域网的主流技术。本文描述了OFDM技术的基本原理和技术特点,结合欧洲DVB-T标准,介绍了COFDM技术在地面数字电视广播中的应用。 OFDM multi-carrier technology is the development direction of broadband wireless transmission technology. It is not only adopted by most countries in the field of digital television transmission, but also has become the mainstream technology of the new generation (4G) mobile communication and broadband wireless local area network. This paper describes the basic principles and technical characteristics of OFDM technology, combined with the European DVB-T standard, introduces the COFDM technology in terrestrial digital television broadcasting applications.