A low complex sub-carrier grouping algorithm based on specified error of channel side information is proposed. The algorithm dynamically groups the sub-carrier of the OFDM system into several sub-bands with little loss of spectral efficiency. 提出了一种基于信道信息误差准则的子载波分组算法,在保证系统频谱效率的同时,根据信道信息误差准则对OFDM系统的子载波进行动态分组。