一种新的MIMO-OFDM系统自适应快时变信道估计算法  

A Novel Adaptive Channel Estimation Algorithm for MIMO-OFDM Systems in Fast Time-varying Channels

作　　者：龚汉东[1] 王瑞春[1] 

机构地区：[1]深圳信息职业技术学院,广东深圳518172

出　　处：《电讯技术》2013年第7期922-926,共5页Telecommunication Engineering

基　　金：广东省科技厅产学研结合项目(2011B090400233)~~

摘　　要：为了能够获得较精确的快时变信道估计,利用模糊模型拟合快时变信道,提出了一种新的信道估计算法。算法采用自适应技术进行导频子载波频域传输函数模型参数的识别,然后通过插值拟合全部信道的频域传输函数。仿真结果表明,在系统多普勒频移小于0.1的情况下,信道估计的MSE性能得到改善。In order to obtain accurate channel estimation in fast time-varying channels, a novel channel estimation algorithm is proposed by using the fuzzy model to track the fast time-varying charmels. Based on the adap tire technique, the identification for the frequency transmission function model of pilot subcarriers is carried out The fitting for the frequency channel transmission function of all subcarriers can be obtained by interpolation According to the simulation results, when the Doppler shift of the systems is less than 0. 1, the algorithm effec tively improves the MSE of the channel estimation.

关 键 词：MIMO-OFDM 自适应信道估计 快时变信道 模糊识别 

分 类 号：TN911[电子电信—通信与信息系统]