一种基于径向基函数网络的OFDM信道估计及跟踪方法  

A radial basis function network-based channel estimation and tracking method for OFDM systems

作　　者：王昕[1] 马杰[1] 滕建辅[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《电路与系统学报》2005年第2期126-130,共5页Journal of Circuits and Systems

摘　　要：本文提出了一种基于径向基函数网络(RBFN)的正交频分复用(OFDM)系统信道估计及跟踪算法。该方法采用分散导频,并将RBFN网络参数相应地分成子集,依次利用导频子集对网络参数子集进行训练、更新,RBFN在学习与逼近信道响应时利用了OFDM信道的时频相关性。仿真结果表明该信道跟踪方法具有良好的误码率性能,且对快衰落有很强的鲁棒性。A radial-basis-function-network-based channel estimation and tracking method is presented for OFDM systems. The scattered pilots are employed for pilot arrangement, and used for the training of RBFN parameters that have been divided into groups according to the pilot subsets. The RBFN parameters are updated by using the training pilot subsets in order, which implied that the inherent correlations in both frequency and time of channel characteristics are utilized. The simulation results show that this method has a good BER performance and is robust to fast fading channel.

关 键 词：径向基函数网络 正交频分复用 信道估计 分散导频 

分 类 号：TN957.53[电子电信—信号与信息处理]