摘要
在正交频分复用(OFDM)系统中,研究稀疏信道估计的导频是基于与OFDM系统导频子载波相关联的测量矩阵的互相关最小化的方法。为了解决由高计算法复杂度的穷举搜索方法导致的次优方法的导频分配问题,提出了两种满足有限等距性质(RIP)的部分定性傅里叶矩阵的导频设计方案。它们分别是基于互相关的不同测量矩阵的列之间的通用随机搜索(GRS)和渐进式搜索(PS)方案。仿真结果表明,提出的两种导频分配方案是有效的,并且相对于以往的导频分配设计方案,提供了优于MSE的信道估计性能。
In OFDM(Orthogonal Frequency Division Multiplexing)system,exploration on the pilot of sparse channel estimation is based on mutual coherence minimization of the measurement matrix associated with the OFDM system pilot subcarrier.In order to solve the pilot allocation problem of suboptimal methods caused by the exhaustive search method with high computational complexity,two pilot design schemes for partially qualitative Fourier matrices satisfying finite equidistant properties(RIP)are proposed,including GRS(Generic Random Search)and PS(Progressive Search)based on bounding the mutual coherence between different columns of the measurement matrix.Simulation results indicate that these two proposed pilot allocation design schemes are effective and could offer a better channel estimation performance in terms of MSE(Mean Square Error)as compared with traditional pilot allocation design schemes.
作者
黄菊菊
HUANG Ju-ju(College of Communication&Information Engineering,Nanjing University of Posts&Telecommunications,Nanjing Jiangsu 210003,China)
出处
《通信技术》
2018年第7期1497-1504,共8页
Communications Technology
关键词
正交频分复用
有限等距性质
通用随机搜索
渐进式搜索
OFDM(Orthogonal Frequency Division Multiplexing)
restricted isometry property
GRS(Generic Random Search)
PS(Progressive Search)
