OFDM系统的迭代联合信道估计与符号检测算法  

An iterative joint channel estimation and symbol detection algorithm for OFDM systems

作　　者：韩冰[1] 王建明[1] 高西奇[1] 尤肖虎[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《通信学报》2003年第8期58-64,共7页Journal on Communications

基　　金：国家"863"计划基金资助项目(2001AA123015)

摘　　要：提出了通过降低导频功率来提高OFDM传输效率,同时采用迭代的联合信道估计和符号检测算法来保证较好误码性能的接收方案。理论分析与仿真结果表明,当数据信息与导频信息的功率比不高于10dB时,本文提出的算法能够有效地降低系统误码率,同时该方法还具有算法简单,收敛速度快的特点。An iterative joint channel estimation and symbol detection algorithm is proposed to improve the BER performance of OFDM systems of which the power of pilots is reduced to enhance the OFDM system efficiency. Both theoretical analysis and simulation results show that when the data to pilot power ratio is not more than 10 dB,the proposed algorithm reduces the BER effectively and has simple steps and fast convergence speed as well.

关 键 词：正交频分复用 导频辅助信道估计 迭代 频率选择性时变衰落信道 

分 类 号：TN911.5[电子电信—通信与信息系统]