摘要
针对在多普勒环境下LTE-A(改进的长期演进)系统时频域二维稀疏信道的特性,根据导频在时频域的分布以及二者之间的相关性,通过将搜索空间分解为时域上OFDM(正交频分复用)符号间和频域上子载波间范围,提出了一种基于OMP(正交匹配追踪)算法改进压缩感知的信道估计。仿真结果表明,改进的OMP算法较原始算法具有更低的MSE(均方误差)。
In view of the characteristics of the two-dimensional sparse channel of the time and frequency domains of the LTE-A systems in Doppler environment and in line with the distribution of pilot in the time and frequency domains and its correlation with them,this paper presents an Orthogonal Matching Pursuit （OMP）algorithm-based improved compressed sensing channel estimation by decomposing the search space into ranges between OFDM symbols in time domain and between subcarriers in fre-quency domain.Simulation results show that the improved OMP algorithm has still lower Mean Square Error （MSE）than the original one.
出处
《光通信研究》
北大核心
2015年第1期72-74,共3页
Study on Optical Communications
