迭代KALMAN 信道估计算法在MIMO-OFDM 系统 - 河北科技大学学报.PDF

31 6 Vol. 31, No . 6 20 10 12 Journal of Hebei University of Science and T echnolo y Dec. 20 10 : 1008- 1542( 2010)06-0550- 03 KALM AN M IMO-OFDM 李 媚, 王 向, 郭立炜 ( 河北科技大学信息科学与工程学院, 河北石家庄 050018) : 讨论了M IMO-OFDM 通信系统中时变信道估计的KA LM AN 滤波算 为了提高传统 KA LM AN 信道估计算 的性能, 提出了一种迭代KALM AN 滤波算 , 将整 个子载波分为2 部 分: 一部分用于发送导频, 另一部分用于发送信号在一个OFDM 符号块中, 对导频子载波和信号 子载波处的无线信道进行循环估计, 从而提高信道估计的精度仿真结果表明, 迭代 KALM AN 滤波算 的性能好于传统KA LM AN 滤波算 : 多输入多输出; 正交频分复用; 信道估计; 卡尔曼滤波算 : T N911 : A Research in performance of iterative KAL MAN channel estimation al orithm in M IM O- OFDM system LI Mei, WANG Xian , GU O L-i w ei ( Colle e of Informat ion Science and En ineerin , H ebei University of Science and T echnolo y, Shijiazhuan H ebei 050018, China) Abstract: This paper discussed the KA LMA N filterin al orithm in MIMO-OFDM system. T o improve the al orithm per- formance, it proposed an iterative KALMA N strate y . By dividin all of the subcarriers into tw o parts, i. e. , is pilot sub-carri- er and si nal sub-carrier, the channels on pilot sub-carrier and si nal sub-carrier are estimated iteratively in one OFDM symbol block. Simulat ion result show s that the performance of the iterat ive al orit hm is better than eneral KALMA N al orithm. Key words: multiple-input multiple-output; ortho onal f requency division multiplex in ; channel est imation; KALMA N filte- rin al orithm [ 1] MIM O( ) OFDM ( ) 2 M IMO- OFDM , 2 : [ 2-4] [ 5] , LS( ) M MSE( ) ; , ( SOS) 2 , , , , ; , KA L