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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。
Coded Orthogonal Frequency Division Multiplexing (COFDM) is a multi-carrier digital communication modulation technology, which has the characteristics of high spectral efficiency and anti-multipath delay spread and so on, so it is generally considered as a super-3rd generation mobile communication system Core Technology. The basic principle is to divide a wideband channel in the frequency domain into multiple overlapping sub-channels for narrowband transmission. At the receiving end, although the spectra overlap each other, the signals on each channel can be correctly separated as long as the orthogonality of signals on each sub-channel is guaranteed. Focus on COFDM communication system encoding technology.