OFDM中子载波分簇技术的应用与研究

简要介绍子载波权值估计采用零阶内插的子载波分簇技术。该技术应用于post-FFT时,可使计算复杂度随着簇中子载波数量的增加而大为减低,但同时系统的性能也会急剧恶化。现选每簇的第一个子载波为导频子载波,并在子载波权值估计时采用一阶内插方法,有效地改善子载波分簇技术的性能。仿真结果表明,在计算量基本维持不变的前提下,所提出的改进子载波分簇技术较原分簇技术性能得到很大的提高。

The Application and Research of Subcarrier Clustering Technology in OFDM

The subcarrier clustering technology adopting zeroorder interpolation method in the subcarrier weight estimation is introduced briefly.This technology can be used to reduce the complexity of post-FFT with the subcarrier number increasing in the cluster,but at the same time the system's performance is deteriorated dramatically.To improve its performance,The first-order interpolation method can be used when the first subcarrier in every cluster is adopted as the pilot subcarrier,It is proved by simulation that the improved subcarrier clustering technology can achieve better performance with the computation complexity remaining unchanged.