摘要
编码正交频分复用(COFDM)是一种多载波数字通信调制技术,它具有频谱利用率高和可对抗多径时延扩展等特点,因此通常被认为是超3代移动通信系统中的核心技术。其基本原理是将频域中的一个宽带信道划分成多个重叠的子信道进行窄带传输。在接收端,虽然频谱相互重叠,但是只要保证各子信道上信号的正交性,就可以将各信道上的信号正确分离。重点研究COFDM通信系统中的编码技术。
Code orthogonal frequency division multiplexing (COFDM) is a promising candidate modulation technique for B3G systems. It is a multi-carrier modulation method which provides efficient bandwidth utilization and the robustness against Multi-path delay spread. The basic principle of COFDM is to divide a wideband frequency channel into several overlapping subchannels. Despite spectral overlap, the subchannels can be perfectly separated at the receiver as long as the subchannels are orthogonal. This dissertation researches on the coding technology in the COFDM communication systems.
出处
《舰船电子工程》
2007年第4期86-89,共4页
Ship Electronic Engineering
