期刊论文

中文

长江信息通信

2096-9759

2018

1

28-30

10.3969/j.issn.1673-1131.2018.01.012

湖南省教育厅科学研究重点项目（16A181） 南华大学研究生科研创新项目（2017XCX12）

本校为第一机构

在移动通信系统中,随着信道时延扩展及多径数目的不断增加,导致在快变信道的估计中,需要估计的基扩展系数大量增加。因此,需要插入更多的导频符号来估计基扩展系数,这将会严重降低频谱利用率。为有效降低导频符号的使用量,我们首先从频域方向插入离散的导频符号,然后利用一种基于卡尔曼滤波器的循环迭代算法,估计出各导频符号间的数据符号作为虚导频。该算法相比连续的梳状导频估计方法,能够有效地降低导频符号的使用量,大大提高频谱利用率。

With the increase of the channel time delay spread and the multipath number in mobile communication system, which lead to a large number of BEM coefficients need to estimate in the time-variant channel estimation. so consequently more pilot symbols are needed, which will seriously reduce the spectrum utilization. In order to effectively decrease the insertion of pilot symbols, we inserted discrete pilot symbols in the frequency domain direction. Then a cyclic iterative algorithm based on the Kalman filter is used in this paper, the data symbols between the pilot symbols are estimated to be the...