摘要
针对频率选择性衰落信道下MIMO—OFDM的系统,基于瑞利衰落信道的模型,利用m序列的自相关性,提出了一种基于m序列做梳状导频的多输入多输出正交频分复用最小二乘算法,该算法可以避免对大矩阵求伪逆,以减少计算复杂度,从而提高了信道估计的计算性能。通过对该算法的误码率性能分析和计算复杂度分析,结果表明,相比传统经典最小二乘算法,所提出信道估计算法在中低信噪比下,有效提高了信道估计性能,适合于在实际应用中实现。
Aiming at MIMO-OFDM channel model and autocorrelation multiplexing least-square algorithm, system under frequency selective fading channel, and based on Rayleigh fading of m sequence, a multi input multi-output orthogonal frequency division with m sequence as the comb pilot is proposed. This algorithm can avoid big pseudo-inverse matrix, thus to reduce the computational complexity and improve the calculation performance of channel estimation. Simulation result and analysis of BER performance and computational complexity of channel estimation indicate that the proposed algorithm could achieve good channel estimation in low channel SNR as compared with classical least squares algorithm, and is quite suitable for actual application
出处
《通信技术》
2011年第4期43-44,47,共3页
Communications Technology
基金
山西高校科技研究开发基金资助项目(编号:20091023)
关键词
信道估计
M序列
最小二乘法
计算复杂度
channel estimation
m sequence
least square（LS）
computational complexity
