摘要
传统的信道估计算法只在单个域上进行,为了降低LTE下行系统中信道估计的复杂度,并提高信道估计器的性能,可以利用LTE下行的多载波OFDM系统的二维结构,对不同的算法在时域和频域分别进行估计。由此可以对传统信道估计算法先在频域上进行信道估计,然后再在时域上进行信道估计,这样的信道估计方式可以大大降低算法的复杂度,并优化估计器的性能。另外,经过时频二维信道估计后,不需要再进行插值计算。仿真结果表明,该算法性能优于传统的只在频域上进行信道估计的性能。
The traditional channel estimation algorithm in a single domain, in order to reduce the complexity of channel estima- tion in the LTE downlink system and improve the performance of the channel estimated, LTE downlink of multi-carrier OFDM system because of its two-dimensional structure for the different algorithms can be estimated in the time domain and frequency domain respectively, which can be the traditional channel estimation algorithm to the frequency domain channel estimation, and then in the time domain channel estimation, this channel estimation can greatly reduce the complexity of the algorithm and opti- mize the performance of the estimator. In addition, after a time-frequency two-dimensional channel estimation does not require interpolation. The simulation results show that the time-frequency domain channel estimation algorithm outperforms the tradi- tional only in the frequency domain channel estimation performance.
出处
《计算机工程与设计》
CSCD
北大核心
2013年第4期1162-1166,1176,共6页
Computer Engineering and Design
基金
国家自然科学基金项目(11062002)
