摘要
提出一种基于时域信道的快速LMMSE信道估计算法,该算法对时域信道能量和信噪比进行信道估计,避免传统的LMMSE信道估计算法中求解自相关矩阵及其逆矩阵的过程,有效降低运算的复杂度。与LS算法相比,该算法可以有效地降低噪声对信道特性的影响。理论分析和仿真结果显示:提出的快速LMMSE算法的性能接近LMMSE算法,但算法复杂度却远低于LMMSE算法。
A fast LMMSE channel estimation algorithm based on time-domain channel was presented based on time-domain channel energy and signal-to-noise ratio to perform channel estimation, which avoids solving the autocorrelation matrix and its inverse matrix of the traditional LMMSE channel estimation algorithm and reduces the computation complexity effectively. Compared with the LS algorithm, the algorithm can reduce the influence of noise on the channel characteristic. Theoretical analysis and simulation results show that the performance of the fast LMMSE algorithm proposed in this paper is close to the LMMSE algorithm, but the algorithm complexity is much lower than LMMSE algorithm.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第12期4218-4223,共6页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(61162004)~~
关键词
正交频分复用
导频辅助信道估计
信道的状态信息
信道能量
噪声方差
orthogonal frequency division multiplexing
pilot aided channel estimation（PSAM）
channel state information（CSI）
channel energy
noise variance
