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.
出处
《应用科技》
CAS
2009年第3期19-22,共4页
Applied Science and Technology
关键词
DFT迭代
MIMO—OFDM系统
信道估计
diserete Fourier transform （ DFT ） iteration
MIMO- OFDM systems
ehannel estimation
