一种改进的DFT迭代的MIMO-OFDM系统信道估计算法  

An improved channel estimation algorithm based on DFT iteration in MIMO-OFDM systems

作　　者：王东[1] 赵宇 王秀红[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]中国移动通信集团黑龙江省有限公司大兴安岭分公司,黑龙江大兴安岭165000

出　　处：《应用科技》2009年第3期19-22,共4页Applied Science and Technology

摘　　要：针对MIMO-OFDM通信系统中的非整数采样信道,提出了一种基于DFT迭代的低复杂度信道估计算法,该算法避免了复杂的矩阵求逆运算,较好地降低了高斯白噪声的影响.与最小二乘(leastsquare,LS)估计算法相比,该算法有较大的性能改善.同时,提出的估计算法同样适用于整数采样信道,具有很好的实用价值.In view of the non- integer sampling channel in the MIMO- OFDM eommunication systems, a low eomplexity channel estimation algorithm based on DFT iteration was proposed. The proposed algorithm can reduee the Gaussian- White noise effeet and avoid the complex matrix inversion operation. Compared with the Least Square estimation algorithm, this algorithm has improved the performanees greatly. Besides, the proposed algorithm is suitable in the integer sampling channel as welk So, the proposed algorithm has a high praetieal value.

关 键 词：DFT迭代 MIMO—OFDM系统 信道估计 

分 类 号：TN929.5[电子电信—通信与信息系统]